RIGHTS AGREEMENT between iBASIS, INC. and COMPUTERSHARE TRUST COMPANY, N.A., as Rights Agent Dated as of July 30, 2009

Exhibit 4.1

between

iBASIS, INC.

and

COMPUTERSHARE TRUST COMPANY, N.A.,
as Rights Agent

Dated as of July 30, 2009

TABLE OF CONTENTS

		Page

Section 1. Certain Definitions		1

Section 2. Appointment of the Rights Agent		6

Section 3. Issuance of Rights Certificates		6

Section 4. Form of Rights Certificates		7

Section 5. Countersignature and Registration		8

Section 6. Transfer, Split-Up, Combination, and Exchange of Rights Certificates; Mutilated, Destroyed, Lost, or Stolen Rights Certificates		8

Section 7. Exercise of Rights; Purchase Price; Expiration Date of Rights		9

Section 8. Cancellation and Destruction of Rights Certificates		11

Section 9. Reservation and Availability of Capital Stock		11

Section 10. Preferred Shares Record Date		13

Section 11. Adjustment of Purchase Price, Number and Kind of Shares, or Number of Rights		13

Section 12. Certificate of Adjusted Purchase Price or Number of Shares		20

Section 13. Consolidation, Merger, or Sale or Transfer of Assets or Earning Power.		20

Section 14. Fractional Rights and Fractional Shares		22

Section 15. Rights of Action		23

Section 16. Agreement of Rights Holders		24

Section 17. Rights Certificate Holder Not Deemed a Stockholder		24

Section 18. Concerning the Rights Agent		25

Section 19. Merger or Consolidation or Change of Name of the Rights Agent		25

Section 20. Duties of the Rights Agent		26

Section 21. Change of the Rights Agent		27

Section 22. Issuance of New Rights Certificates		28

Table of Contents
(Continued)

		Page

Section 23. Redemption and Xxxxxxxxxxx		00

Xxxxxxx 00. Exchange of Rights		29

Section 25. Notice of Certain Events		31

Section 26. Notices		31

Section 27. Supplements and Amendments		32

Section 28. Successors		32

Section 29. Determinations and Actions by the Board of Directors		33

Section 30. Benefits of this Agreement		33

Section 31. Severability		33

Section 32. Governing Law		33

Section 33. Counterparts; Facsimiles and PDFs		33

Section 34. Descriptive Headings		34

Section 35. Force Majeure		34

EXHIBITS

Exhibit A – Form of Certificate of Designation, Preferences, and Rights

Exhibit B – Form of Rights Certificate

Exhibit C – Form of Summary of Rights to Purchase Preferred Stock

RIGHTS AGREEMENT

RIGHTS AGREEMENT, dated as of July 30, 2009 (this “Agreement”), between iBasis, Inc., a Delaware corporation (the “Company”), and Computershare Trust Company, N.A. (the “Rights Agent”).

RECITALS

WHEREAS, on July 30, 2009 (the “Rights Dividend Declaration Date”), the Board of Directors of the Company authorized and declared a dividend distribution of one right (each, a “Right”) for each Common Share (as hereinafter defined) outstanding at the Close of Business on August 10, 2009 (the “Record Date”), and further authorized and directed the issuance of one Right (as such number may hereinafter be adjusted pursuant hereto) with respect to each Common Share issued between the Record Date (whether originally issued or delivered from the Company’s treasury) and, except as otherwise provided in Section 22, the earlier of the Distribution Date and the Expiration Date (as such terms are hereinafter defined), each Right initially representing the right to purchase one one-hundredth of a Preferred Share (as hereinafter defined), upon the terms and subject to the conditions hereinafter set forth.

AGREEMENT

NOW, THEREFORE, in consideration of the premises and the mutual agreements herein set forth, the parties hereby agree as follows:

Section 1. Certain Definitions. For purposes of this Agreement, the following terms have the meanings indicated:

(a) “Acquiring Person” shall mean any Person who or which, together with all Affiliates and Associates of such Person, shall be the Beneficial Owner of 15% or more of the Common Shares then outstanding, but shall not include an Exempt Person. Notwithstanding the foregoing:

(i) any Person who becomes the Beneficial Owner of 15% or more of the Common Shares then outstanding as a result of a reduction in the number of Common Shares outstanding due to the repurchase of Common Shares by the Company shall not be deemed an “Acquiring Person” unless and until such Person acquires Beneficial Ownership of any additional Common Shares (other than as a result of a stock dividend, stock split, or similar transaction effected by the Company in which all registered holders of Common Shares are treated substantially equally) while the Beneficial Owner of 15% or more of the Common Shares then outstanding;

(ii) if the Board of Directors of the Company determines in good faith that a Person who would otherwise be an Acquiring Person has become such inadvertently, and such Person divests as promptly as practicable a sufficient number of Common Shares so that such Person is no longer the Beneficial Owner of 15% or more of the Common Shares then

outstanding, then such Person shall not be deemed to be or ever to have been an “Acquiring Person” for any purposes of this Agreement as a result of such inadvertent acquisition; and

(iii) if a Person would otherwise be deemed an “Acquiring Person” upon the execution of this Agreement, such Person (herein referred to as a “Grandfathered Stockholder”) shall not be deemed an “Acquiring Person” for purposes of this Agreement unless and until, subject to Section 1(a)(i) and Section 1(a)(ii) above, such Grandfathered Stockholder acquires Beneficial Ownership of any additional Common Shares (other than as a result of a stock dividend, stock split, or similar transaction effected by the Company in which all registered holders of Common Shares are treated substantially equally) after execution of this Agreement and while the Beneficial Owner of 15% or more of the Common Shares then outstanding, in which case such Person shall no longer be deemed a Grandfathered Stockholder and shall be deemed an “Acquiring Person.”

(b) “Act” shall mean the Securities Act of 1933, as amended.

(c) “Adjustment Shares” shall have the meaning set forth in Section 11(a)(ii) hereof.

(d) “Affiliate” and “Associate” shall have the respective meanings ascribed to such terms in Rule 12b-2 of the General Rules and Regulations under the Exchange Act as in effect on the date of this Agreement.

(e) “Agreement” shall have the meaning set forth in the preamble hereto.

(f) A Person shall be deemed the “Beneficial Owner” of, shall be deemed to have “Beneficial Ownership” of, and shall be deemed to “beneficially own,” any securities:

(i) which such Person or any of such Person’s Affiliates or Associates beneficially owns, directly or indirectly (as determined pursuant to Rule 13d-3 of the General Rules and Regulations under the Exchange Act as in effect on the date of this Agreement);

(ii) which such Person or any of such Person’s Affiliates or Associates, directly or indirectly, has the right to acquire (whether such right is exercisable immediately or only after the passage of time) pursuant to any agreement, arrangement, or understanding (whether or not in writing) or upon the exercise of conversion rights, exchange rights, rights, warrants, or options, or otherwise; provided, however, that a Person shall not be deemed the “Beneficial Owner” of, to have “Beneficial Ownership” of, or to “beneficially own,” (A) securities tendered pursuant to a tender or exchange offer made by or on behalf of such Person or any of such Person’s Affiliates or Associates until such tendered securities are accepted for purchase or exchange, (B) securities issuable upon exercise of Rights at any time prior to the occurrence of a Triggering Event (as hereinafter defined), or (C) securities issuable upon exercise of Rights from and after the occurrence of a Triggering Event, which Rights were acquired by such Person or any of such Person’s Affiliates or Associates prior to the Distribution Date or pursuant to Section 3(a) or Section 22 hereof (the “Original Rights”) or pursuant to Section 11(i) or Section 11(p) hereof in connection with an adjustment made with respect to any Original Rights;

(iii) which such Person or any of such Person’s Affiliates or Associates, directly or indirectly, has the right to vote or dispose of, including pursuant to any agreement, arrangement, or understanding (whether or not in writing); provided, however, that a Person shall not be deemed the “Beneficial Owner” of, to have “Beneficial Ownership” of, or to “beneficially own,” any security as a result of an agreement, arrangement, or understanding (whether or not in writing) to vote such security if such agreement, arrangement, or understanding: (A) arises solely from a revocable proxy (as such term is defined in Regulation 14A under the Exchange Act) given in response to a public proxy or consent solicitation made pursuant to, and in accordance with, the applicable provisions of the General Rules and Regulations under the Exchange Act, including the disclosure requirements of Schedule 14A thereunder, and (B) is not also then reportable by such Person on Schedule 13D under the Exchange Act (or any comparable or successor report); or

(iv) which are beneficially owned, directly or indirectly, by any other Person (or any Affiliate or Associate thereof) with which such Person (or any of such Person’s Affiliates or Associates) has any agreement, arrangement, or understanding (whether or not in writing) for the purpose of acquiring, holding, voting (except pursuant to a revocable proxy as described in the proviso to Section 1(f)(iii)), or disposing of any voting securities of the Company;

provided, however, that nothing in this Section 1(f) shall cause a Person engaged in business as an underwriter of securities to be the “Beneficial Owner” of, to have “Beneficial Ownership” of, or to “beneficially own,” any securities acquired or which such Person has the right to acquire through such Person’s participation in good faith in a firm commitment underwriting until the expiration of 40 days after the date of such acquisition, and then only if such securities continue to be owned by such Person at such expiration of 40 days; and provided further, however, that any stockholder of the Company, with Affiliate(s), Associate(s), or other Person(s) who may be deemed representatives of it serving as director(s) of the Company, shall not be deemed to beneficially own securities held by such Persons serving as director(s) of the Company to the extent such securities were issued by the Company to such director(s) in the ordinary course of business as compensation for their services as director(s) of the Company.

(g) “Business Day” shall mean any day other than a Saturday, Sunday, or a day on which banking institutions in the State of New York are authorized or obligated by law or executive order to close.

(h) “Certificate of Incorporation” shall have the meaning set forth in Section 11(a)(iii) hereof.

(i) “Close of Business” on any given date shall mean 5:00 P.M., New York City time, on such date; provided, however, that if such date is not a Business Day, it shall mean 5:00 P.M., New York City time, on the next succeeding Business Day.

(j) “Common Shares” shall mean the shares of common stock, par value $0.001 per share, of the Company, except that “Common Shares” when used with reference to any Person other than the Company shall mean the capital stock of such Person with the greatest voting power, or the equity securities or other equity interests having power to control or direct the management of such Person.

(k) “Common Stock Equivalents” shall have the meaning set forth in Section 11(a)(iii) hereof.

(l) “Company” shall have the meaning set forth in the parties clause at the beginning of this Agreement, except as otherwise provided in Section 13(a) hereof.

(m) “Current Market Price” shall have the meaning set forth in Section 11(d) hereof.

(n) “Current Value” shall have the meaning set forth in Section 11(a)(iii) hereof.

(o) “Distribution Date” shall have the meaning set forth in Section 3(a) hereof.

(p) “Equivalent Preferred Shares” shall have the meaning set forth in Section 11(b) hereof.

(q) “Exchange Act” shall mean the Securities Exchange Act of 1934, as amended.

(r) “Exchange Ratio” shall have the meaning set forth in Section 24(a) hereof.

(s) “Exempt Person” shall mean (i) the Company, (ii) any Subsidiary of the Company, (iii) any employee benefit plan of the Company or of any Subsidiary of the Company, or (iv) any Person or entity organized, appointed, or established by the Company or any Subsidiary of the Company for or pursuant to the terms of any such employee benefit plan.

(t) “Expiration Date” shall have the meaning set forth in Section 7(a) hereof.

(u) “Final Expiration Date” shall have the meaning set forth in Section 7(a) hereof.

(v) “Grandfathered Stockholder” shall have the meaning set forth in Section 1(a)(iii) hereof.

(w) “Original Rights” shall have the meaning set forth in Section 1(f)(ii) hereof.

(x) “Ownership Statement” shall have the meaning set forth in Section 3(a) hereof.

(y) “Person” shall mean any individual, firm, corporation, partnership, limited liability company, limited liability partnership, trust, syndicate, or other entity, and shall include any successor (by merger or otherwise) of such entity.

(z) “Preferred Shares” shall mean shares of Series A Junior Participating Preferred Stock, par value $0.001 per share, of the Company having the rights and preferences set forth in the Certificate of Designation attached to this Agreement as Exhibit A, and, to the extent that there are not a sufficient number of shares of Series A Junior Participating Preferred Stock authorized to permit the full exercise of the Rights, any other series of preferred stock of the Company designated for such purpose containing terms substantially similar to the terms of the Series A Junior Participating Preferred Stock.

(aa) “Principal Party” shall have the meaning set forth in Section 13(b) hereof.

(bb) “Purchase Price” shall have the meaning set forth in Section 7(b) hereof.

(cc) “Record Date” shall have the meaning set forth in the recital to this Agreement.

(dd) “Redemption Price” shall have the meaning set forth in Section 23(a) hereof.

(ee) “Right” shall have the meaning set forth in the recital to this Agreement.

(ff) “Rights Agent” shall have the meaning set forth in the parties clause at the beginning of this Agreement, except as otherwise provided in Section 19 and Section 21 hereof.

(gg) “Rights Certificate” shall have the meaning set forth in Section 3(a) hereof.

(hh) “Rights Dividend Declaration Date” shall have the meaning set forth in the recital to this Agreement.

(ii) “Section 11(a)(ii) Event” shall have the meaning set forth in Section 11(a)(ii) hereof.

(jj) “Section 11(a)(ii) Trigger Date” shall have the meaning set forth in Section 11(a)(iii) hereof.

(kk) “Section 13 Event” shall mean any event described in Section 13(a)(i), Section 13(a)(ii), or Section 13(a)(iii) hereof.

(ll) “Shares Acquisition Date” shall mean the first date of public announcement (which, for purposes of this definition, shall include, without limitation, a report filed or amended pursuant to Section 13(d) under the Exchange Act) by the Company or an Acquiring Person that an Acquiring Person has become such.

(mm) “Spread” shall have the meaning set forth in Section 11(a)(iii) hereof.

(nn) “Subsidiary” shall mean, with reference to any Person, any corporation or other entity of which an amount of voting securities (or other ownership interests having ordinary voting power) sufficient to elect or appoint at least a majority of the directors (or other persons performing similar functions) of such corporation or other entity is beneficially owned, directly or indirectly, by such Person, or otherwise controlled by such Person.

(oo) “Substitution Period” shall have the meaning set forth in Section 11(a)(iii) hereof.

(pp) “Summary of Rights” shall have the meaning set forth in Section 3(b) hereof.

(qq) “Trading Day” shall have the meaning set forth in Section 11(d)(i) hereof.

(rr) “Triggering Event” shall mean a Section 11(a)(ii) Event or any Section 13 Event.

(ss) “Trust” shall have the meaning set forth in Section 24(f) hereof.

(tt) “Trust Agreement” shall have the meaning set forth in Section 24(f) hereof.

Section 2. Appointment of the Rights Agent. The Company hereby appoints the Rights Agent to act as agent for the Company in accordance with the terms and conditions hereof, and the Rights Agent hereby accepts such appointment. The Company may from time to time appoint such co-rights agents as it may deem necessary or desirable, upon ten (10) days’ prior written notice to the Rights Agent. The Rights Agent shall have no duty to supervise, and shall in no event be liable for, the acts or omission of any such co-rights agent.

Section 3. Issuance of Rights Certificates.

(a) Until the earliest of (i) the Close of Business on the tenth day after the Shares Acquisition Date (or, if the tenth day after the Shares Acquisition Date occurs before the Record Date, the close of business on the Record Date), (ii) the Close of Business on the tenth Business Day (or such later date as the Board of Directors of the Company may determine prior to such time as any Person becomes an Acquiring Person) after the date of commencement by or on behalf of any Person (other than an Exempt Person) of a tender offer or exchange offer, if such tender offer or exchange offer has not commenced as of the date hereof, and upon consummation thereof, such Person would become an Acquiring Person and (iii) immediately prior to the acceptance for payment of the Common Shares tendered pursuant to any tender offer or exchange offer commenced by or on behalf of any Person (other than an Exempt Person) prior to, and pending as of, the date hereof, if upon consummation thereof, such Person would become an Acquiring Person (the earliest of (i), (ii) and (iii) being herein referred to as the “Distribution Date”), (A) the Rights will be evidenced (subject to Section 3(b) and Section 3(c) hereof) by the certificates for the Common Shares registered in the names of the holders of the Common Shares (which certificates for Common Shares shall be deemed also to be certificates for Rights) or by the current ownership statement issued with respect to uncertificated Common Shares in lieu of such a certificate (an “Ownership Statement”) (which Ownership Statement shall be deemed to be also a certificate for Rights) and not by separate certificates, and the registered holders of the Common Shares shall also be the registered holders of the associated Rights, and (B) the Rights will be transferable only in connection with the transfer of the underlying Common Shares (including a transfer to the Company); provided, however, that if a tender or exchange offer is terminated prior to the occurrence of a Distribution Date, then no Distribution Date shall occur as a result of such tender or exchange offer. As soon as practicable after the Distribution Date, the Rights Agent will send, in accordance with Section 26 hereof, to each record holder of the Common Shares as of the Close of Business on the Distribution Date (other than an Acquiring Person or any Associate or Affiliate of an Acquiring Person), one or more rights certificates, in substantially the form of Exhibit B hereto (the “Rights Certificates”), evidencing one Right for each Common Share so held, subject to adjustment as provided herein. In the event that an adjustment in the number of Rights per Common Share has been made pursuant to Section 11(i) or Section 11(p) hereof, at the time of distribution of the Rights Certificates, the Company shall not be required to issue Rights Certificates evidencing fractional Rights but may, in lieu thereof, make the necessary and appropriate rounding adjustments (in accordance with Section 14(a) hereof) so that Rights Certificates evidencing only whole numbers of Rights are distributed and cash is paid in lieu of any fractional Rights. As of and after the Distribution Date, the Rights will be evidenced solely by such Rights Certificates.

(b) As promptly as practicable following the Record Date, the Company will send a copy of a Summary of Rights, in substantially the form attached hereto as Exhibit C (the

“Summary of Rights”), by first class, postage-prepaid mail, to each record holder of Common Shares as of the Close of Business on the Record Date, at the address of such holder shown on the records of the Company as the address at which such holder has consented to receive notice. With respect to Common Shares outstanding as of the Record Date, until the Distribution Date, the Rights associated with such shares will be evidenced by the certificate or Ownership Statement for such Common Shares registered in the names of the holders thereof, in each case together with the Summary of Rights. Until the Distribution Date (or, if earlier, the Expiration Date), the surrender for transfer of any certificate or Ownership Statement for Common Shares outstanding on the Record Date, with or without a copy of the Summary of Rights, shall also constitute the transfer of the Rights associated with the Common Shares represented by such certificate or Ownership Statement.

(c) Rights shall be issued in respect of all Common Shares that are issued (whether originally issued or from the Company’s treasury) after the Record Date but prior to the earlier of the Distribution Date and the Expiration Date and, to the extent provided in Section 22 hereof, in respect of Common Shares issued after the Distribution Date. Certificates evidencing such Common Shares and Ownership Statements issued after the Record Date but prior to the earlier of the Distribution Date and the Expiration Date shall have printed or otherwise affixed to them the following legend:

This [certificate/statement] also evidences and entitles the registered holder hereof to certain Rights as set forth in the Rights Agreement between iBasis, Inc. (the “Company”) and the Rights Agent thereunder dated as of July 30, 2009 (the “Rights Agreement”), the terms of which are hereby incorporated herein by reference and a copy of which is on file at the principal offices of the Company. Under certain circumstances, as set forth in the Rights Agreement, such Rights will be evidenced by separate certificates and will no longer be evidenced by this [certificate/statement]. The Company will mail to the registered holder of this [certificate/statement] a copy of the Rights Agreement, as in effect on the date of mailing, without charge, promptly after receipt of a written request therefor. Under certain circumstances set forth in the Rights Agreement, Rights issued to, or beneficially owned by, any Person who is, was, or becomes an Acquiring Person or any Affiliate or Associate thereof (as such terms are defined in the Rights Agreement), whether currently beneficially owned by or on behalf of such Person or by any subsequent beneficial owner, may become null and void.

In the event the Company purchases or otherwise acquires any Common Shares after the Record Date but prior to the Distribution Date, any Rights associated with such Common Shares shall be deemed cancelled and retired so that the Company shall not be entitled to exercise any Rights associated with such Common Shares that are no longer outstanding.

Section 4. Form of Rights Certificates. The Rights Certificates (and the forms of election to purchase and of assignment and the certificates contained therein to be printed on the reverse thereof) shall each be substantially in the form attached hereto as Exhibit B and may have such marks of identification or designation and such legends, summaries, or endorsements printed thereon as the Company may deem appropriate and as are not inconsistent with the provisions of this Agreement, or as may be required to comply with any applicable law or with

any rule or regulation made pursuant thereto or with any rule or regulation of any stock exchange on which the Rights may from time to time be listed, or to conform to usage. Subject to the provisions of Section 22 hereof, the Rights Certificates, whenever distributed, shall be dated as of the Record Date and on their face shall entitle the registered holders thereof to purchase such number of one one-hundredths of a Preferred Share as shall be set forth therein at the Purchase Price, but the amount and type of securities purchasable upon the exercise of each Right and the Purchase Price thereof shall be subject to adjustment as provided herein.

Section 5. Countersignature and Registration.

(a) The Rights Certificates shall be executed on behalf of the Company by its Chairman of the Board, its Chief Executive Officer, its President, or any Vice President, either manually or by facsimile signature, and shall have affixed thereto the Company’s seal or a facsimile thereof which shall be attested by the Secretary or an Assistant Secretary of the Company, either manually or by facsimile signature. The Rights Certificates shall be countersigned by an authorized signatory of the Rights Agent, either manually or by facsimile signature, and shall not be valid for any purpose unless so countersigned. In case any officer of the Company who shall have signed any of the Rights Certificates shall cease to be such officer of the Company before countersignature by an authorized signatory of the Rights Agent and issuance and delivery by the Company, such Rights Certificates, nevertheless, may be countersigned by an authorized signatory of the Rights Agent and issued and delivered by the Company with the same force and effect as though the person who signed such Rights Certificates had not ceased to be such officer of the Company; and any Rights Certificates may be signed on behalf of the Company by any person who, at the actual date of the execution of such Rights Certificate, shall be a proper officer of the Company to sign such Rights Certificate, although at the date of the execution of this Agreement any such person was not such an officer.

(b) Following the Distribution Date, the Rights Agent will keep, or cause to be kept, at its principal office or offices designated as the appropriate place for surrender of Rights Certificates upon exercise or transfer, books for registration and transfer of the Rights Certificates issued hereunder. Such books shall show the names and addresses of the respective holders of the Rights Certificates, the number of Rights evidenced on its face by each of the Rights Certificates, and the date of each of the Rights Certificates.

Section 6. Transfer, Split-Up, Combination, and Exchange of Rights Certificates; Mutilated, Destroyed, Lost, or Stolen Rights Certificates.

(a) Subject to the provisions of Section 7(e), and Section 14 hereof, at any time after the Close of Business on the Distribution Date, and at or prior to the Close of Business on the Expiration Date, any Rights Certificate or Certificates (other than Rights Certificates evidencing Rights that have been redeemed or exchanged pursuant to Section 23 or Section 24 hereof) may be transferred, split-up, combined, or exchanged for another Rights Certificate or Certificates, entitling the registered holder to purchase a like number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares, other securities, cash, or other assets, as the case may be) as the Rights Certificate or Certificates surrendered then entitles such holder (or former holder in the case of a transfer) to purchase. Any registered holder desiring to transfer, split-up, combine, or exchange any Rights Certificate or Certificates

shall make such request in writing delivered to the Rights Agent, and shall surrender the Rights Certificate or Certificates to be transferred, split-up, combined, or exchanged, with the form of assignment and certificate contained therein duly executed, at the principal office or offices of the Rights Agent designated for such purpose. Neither the Rights Agent nor the Company shall be obligated to take any action whatsoever with respect to the transfer of any such surrendered Rights Certificate until the registered holder shall have completed and signed the certificate contained in the form of assignment on the reverse side of such Rights Certificate and shall have provided such additional evidence of the identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates thereof as the Company shall reasonably request. Thereupon the Rights Agent shall, subject to Section 7(e), Section 14, and Section 24 hereof, countersign and deliver to the Person entitled thereto a Rights Certificate or Rights Certificates, as the case may be, as so requested. The Company may require payment from a registered holder of a Rights Certificate of a sum sufficient to cover any tax or governmental charge that may be imposed in connection with any transfer, split-up, combination, or exchange of Rights Certificates.

(b) Upon receipt by the Company and the Rights Agent of evidence reasonably satisfactory to them of the loss, theft, destruction, or mutilation of a Rights Certificate, and, in case of loss, theft, or destruction, of indemnity or security reasonably satisfactory to them, and reimbursement to the Company and the Rights Agent of all reasonable expenses incidental thereto, and upon surrender to the Rights Agent and cancellation of the Rights Certificate, if mutilated, the Company will execute and deliver a new Rights Certificate of like tenor to the Rights Agent for countersignature and delivery to the registered holder in lieu of the Rights Certificate so lost, stolen, destroyed, or mutilated.

Section 7. Exercise of Rights; Purchase Price; Expiration Date of Rights.

(a) Subject to Section 7(e) hereof, at any time after the Distribution Date the registered holder of any Rights Certificate may exercise the Rights evidenced thereby (except as otherwise provided herein including, without limitation, the restrictions on exercisability set forth in Section 9(c), Section 11(a)(iii), Section 23(a), and Section 24(a) hereof) in whole or in part upon surrender of the Rights Certificate, with the form of election to purchase and the certificate contained therein duly executed, to the Rights Agent at the principal office or offices of the Rights Agent designated for such purpose, together with payment of the aggregate Purchase Price with respect to the total number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares, other securities, cash, or other assets, as the case may be) as to which such surrendered Rights are then exercisable, at or prior to the earliest of (i) the Close of Business on July 30, 2010 (the “Final Expiration Date”), (ii) the time at which the Rights are redeemed as provided in Section 23 hereof, and (iii) the time at which the Rights are exchanged in full as provided in Section 24 hereof (the earliest of (i), (ii), and (iii) being herein referred to as the “Expiration Date”).

(b) The purchase price for each one one-hundredth of a Preferred Share pursuant to the exercise of a Right initially shall be $10.00, shall be subject to adjustment from time to time as provided in Section 11 and Section 13(a) hereof, and shall be payable in accordance with Section 7(c) hereof (such purchase price, as so adjusted, the “Purchase Price”).

(c) Upon receipt of a Rights Certificate evidencing exercisable Rights, with the form of election to purchase and the certificate contained therein duly executed, accompanied by payment, with respect to each Right so exercised, of the Purchase Price per one one-hundredth of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares, other securities, cash, or other assets, as the case may be) to be purchased as set forth below and an amount equal to any applicable transfer tax, the Rights Agent shall, subject to Section 20(k) hereof, thereupon promptly (i) (A) requisition from any transfer agent of the Preferred Shares (or make available, if the Rights Agent is the transfer agent for such shares) certificates for the total number of one one-hundredths of a Preferred Share to be purchased and the Company hereby irrevocably authorizes its transfer agent to comply with all such requests, or (B) if the Company shall have elected to deposit the total number of Preferred Shares issuable upon exercise of the Rights hereunder with a depositary agent, requisition from the depositary agent depositary receipts evidencing such number of one one-hundredths of a Preferred Share as are to be purchased (in which case certificates for the Preferred Shares evidenced by such receipts shall be deposited by the transfer agent with the depositary agent) and the Company will direct the depositary agent to comply with such request, (ii) requisition from the Company the amount of cash, if any, to be paid in lieu of fractional shares in accordance with Section 14 hereof, (iii) after receipt of such certificates or depositary receipts, cause the same to be delivered to or, upon the order of the registered holder of such Rights Certificate, registered in such name or names as may be designated by such holder, and (iv) after receipt thereof, deliver such cash, if any, to or upon the order of the registered holder of such Rights Certificate. The payment of the Purchase Price (as such amount may be reduced pursuant to Section 11(a)(iii) hereof) shall be made in cash or by certified bank check or bank draft payable to the order of the Company. In the event that the Company is obligated to issue other securities (including Common Shares) of the Company, pay cash, or distribute other property pursuant to Section 11(a) hereof, the Company will make all arrangements necessary so that such other securities, cash, or other property are available for distribution by the Rights Agent, if and when appropriate. The Company reserves the right to require prior to the occurrence of a Triggering Event that, upon any exercise of Rights, a number of Rights be exercised so that only whole Preferred Shares would be issued.

(d) In case the registered holder of any Rights Certificate shall exercise less than all the Rights evidenced thereby, a new Rights Certificate evidencing the Rights remaining unexercised shall be issued by the Rights Agent and delivered to, or upon the order of, the registered holder of such Rights Certificate, registered in such name or names as may be designated by such holder, subject to the provisions of Section 14 hereof.

(e) Notwithstanding anything in this Agreement to the contrary, from and after the first occurrence of a Section 11(a)(ii) Event, any Rights beneficially owned by (i) an Acquiring Person or an Associate or Affiliate of an Acquiring Person, (ii) a transferee of an Acquiring Person (or of any such Associate or Affiliate) who becomes a transferee after the Acquiring Person becomes such, or (iii) a transferee of an Acquiring Person (or of any such Associate or Affiliate) who becomes a transferee prior to or concurrently with the Acquiring Person becoming such and receives such Rights pursuant to either (A) a transfer (whether or not for consideration) from the Acquiring Person (or any such Associate of Affiliate) to holders of equity interests in such Acquiring Person (or any such Associate or Affiliate) or to any Person with whom the Acquiring Person (or any such Associate of Affiliate) has any continuing agreement, arrangement, or understanding (whether or not in writing) regarding the transferred Rights or

(B) a transfer that the Board of Directors of the Company, in its sole discretion, has determined is part of a plan, arrangement, or understanding (whether or not in writing) that has as a primary purpose or effect the avoidance of the provisions of this Section 7(e), shall become null and void without any further action and no holder of such Rights shall have any rights whatsoever with respect to such Rights, whether under any provision of this Agreement or otherwise. The Company shall use all reasonable efforts to ensure that the provisions of this Section 7(e) are complied with, but shall have no liability to any holder of Rights Certificates or any other Person as a result of its failure to make any determinations with respect to an Acquiring Person or any of its Affiliates, Associates, or transferees hereunder.

(f) Notwithstanding anything in this Agreement to the contrary, neither the Rights Agent nor the Company shall be obligated to undertake any action with respect to a registered holder of a Rights Certificate upon the occurrence of any purported exercise as set forth in this Section 7 unless such registered holder shall have (i) completed and signed the certificate contained in the form of election to purchase set forth on the reverse side of the Rights Certificate surrendered for such exercise, and (ii) provided such additional evidence of the identity of the Beneficial Owner (or former Beneficial Owner) or Affiliates or Associates thereof as the Company shall reasonably request.

Section 8. Cancellation and Destruction of Rights Certificates. All Rights Certificates surrendered for the purpose of exercise, transfer, split-up, combination, or exchange shall, if surrendered to the Company or any of its agents, be delivered to the Rights Agent for cancellation or in cancelled form, or, if surrendered to the Rights Agent, shall be cancelled by it, and no Rights Certificates shall be issued in lieu thereof except as expressly permitted by any of the provisions of this Agreement. The Company shall deliver to the Rights Agent for cancellation and retirement, and the Rights Agent shall so cancel and retire, any other Rights Certificate purchased or acquired by the Company otherwise than upon the exercise thereof. The Rights Agent shall deliver all cancelled Rights Certificates to the Company, or shall, at the written request of the Company, destroy such cancelled Rights Certificates, and in such case shall deliver a certificate of destruction thereof to the Company.

Section 9. Reservation and Availability of Capital Stock.

(a) The Company covenants and agrees that it will cause to be reserved and kept available out of its authorized and unissued Preferred Shares, the number of Preferred Shares that will be sufficient to permit the exercise in full of all outstanding Rights in accordance with Section 7 hereof.

(b) So long as the Preferred Shares (and, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) issuable and deliverable upon the exercise of the Rights may be listed on any national securities exchange or quoted on a quotation system, the Company shall use its best efforts to cause, from and after such time as the Rights become exercisable, all shares reserved for such issuance to be listed on such exchange or quoted on such quotation system, as the case may be, upon official notice of issuance upon such exercise.

(c) The Company shall use its best efforts to (i) file, as soon as practicable following the earliest date after the first occurrence of a Section 11(a)(ii) Event on which the consideration to be delivered by the Company upon exercise of the Rights has been determined in accordance with Section 11(a) hereof, a registration statement on an appropriate form under the Act, with respect to the securities purchasable upon exercise of the Rights, (ii) cause such registration statement to become effective as soon as practicable after such filing, and (iii) cause such registration statement to remain effective (with a prospectus at all times meeting the requirements of the Act) until the earlier of (A) the date as of which the Rights are no longer exercisable for such securities, and (B) the date of the expiration of the Rights. The Company will also take such action as may be appropriate under, or to ensure compliance with, the securities or “blue sky” laws of the various states in connection with the exercisability of the Rights. The Company may temporarily suspend, for a period of time not to exceed 90 days after the date set forth in clause (i) of the first sentence of this Section 9(c), the exercisability of the Rights in order to prepare and file such registration statement and permit it to become effective. Upon any such suspension, the Company shall issue a public announcement stating that the exercisability of the Rights has been temporarily suspended, as well as a public announcement at such time as the suspension is no longer in effect. In addition, if the Company shall determine that a registration statement is required following the Distribution Date, the Company similarly may temporarily suspend the exercisability of the Rights until such time as a registration statement has been declared effective. Notwithstanding any provision of this Agreement to the contrary, the Rights shall not be exercisable in any jurisdiction if the requisite qualification in such jurisdiction shall not have been obtained, or the exercise thereof shall not be permitted under applicable law, or a registration statement shall not have been declared effective.

(d) The Company covenants and agrees that it will take all such action as may be necessary to ensure that all one one-hundredths of a Preferred Share (and, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) delivered upon exercise of the Rights shall, at the time of delivery of the certificates for such shares (subject to payment of the Purchase Price), be duly and validly authorized and issued and fully paid and nonassessable.

(e) The Company further covenants and agrees that it will pay when due and payable any and all federal and state transfer taxes and charges that may be payable in respect of the issuance or delivery of the Rights Certificates and of any certificates for a number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) upon the exercise of Rights. The Company shall not, however, be required to pay any transfer tax that may be payable in respect of any transfer or delivery of Rights Certificates to a Person other than, or the issuance or delivery of a number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) in a name other than that of the registered holder of the Rights Certificates evidencing Rights surrendered for exercise or to issue or deliver any certificates for a number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) in a name other than that of the registered holder upon the exercise of any Rights until such tax shall have been paid (any such tax being payable by the registered holder of such Rights Certificates at the time of surrender) or until it has been established to the Company’s satisfaction that no such tax is due.

Section 10. Preferred Shares Record Date. Each person in whose name any certificate for a number of one one-hundredths of a Preferred Share (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) is issued upon the exercise of Rights shall for all purposes be deemed to have become the holder of record of such fractional Preferred Shares (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) evidenced thereby on, and such certificate shall be dated, the date upon which the Rights Certificate evidencing such Rights was duly surrendered and payment of the Purchase Price (and all applicable transfer taxes) was made; provided, however, that if the date of such surrender and payment is a date upon which the Preferred Shares (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) transfer books of the Company are closed, such Person shall be deemed to have become the record holder of such shares (fractional or otherwise) on, and such certificate shall be dated, the next succeeding Business Day on which the Preferred Shares (or, following the occurrence of a Triggering Event, Common Shares or other securities, as the case may be) transfer books of the Company are open. Prior to the exercise of the Rights evidenced thereby, the registered holder of a Rights Certificate shall not be entitled to any rights of a stockholder of the Company with respect to shares for which the Rights shall be exercisable, including, without limitation, the right to vote, to receive dividends or other distributions, or to exercise any preemptive rights, and shall not be entitled to receive any notice of any proceedings of the Company, except as provided herein.

Section 11. Adjustment of Purchase Price, Number and Kind of Shares, or Number of Rights. The Purchase Price, the number and kind of shares, or fractions thereof, purchasable upon exercise of each Right, and the number of Rights outstanding are subject to adjustment from time to time as provided in this Section 11.

(a) (i) In the event the Company shall at any time after the date of this Agreement (A) declare or pay a dividend on the Preferred Shares payable in Preferred Shares, (B) subdivide or split the outstanding Preferred Shares, (C) combine or consolidate the outstanding Preferred Shares into a smaller number of shares, or (D) issue any shares of its capital stock in a reclassification of the Preferred Shares (including any such reclassification in connection with a consolidation or merger in which the Company is the continuing or surviving corporation), except as otherwise provided in this Section 11(a) and Section 7(e) hereof, the Purchase Price in effect at the time of the record date for such dividend or of the effective date of such subdivision, split, combination, consolidation, or reclassification, and the number and kind of Preferred Shares (or other capital stock, as the case may be), issuable on such date, shall be proportionately adjusted so that the registered holder of any Right exercised after such time shall be entitled to receive, upon payment of the Purchase Price then in effect, the aggregate number and kind of Preferred Shares (or other capital stock, as the case may be), which, if such Right had been exercised immediately prior to such date (whether or not such Right was then exercisable) and at a time when the Preferred Share (or other capital stock, as the case may be) transfer books of the Company were open, such holder would have owned upon such exercise and been entitled to receive by virtue of such dividend, subdivision, split, combination, consolidation, or reclassification. If an event occurs that would require an adjustment under both this Section 11(a)(i) and Section 11(a)(ii) hereof, the adjustment provided for in this Section 11(a)(i)

shall be in addition to, and shall be made prior to, any adjustment required pursuant to Section 11(a)(ii) hereof.

(ii) In the event any Person shall become an Acquiring Person (a “Section 11(a)(ii) Event”), then, promptly following the occurrence of such Section 11(a)(ii) Event, proper provision shall be made so that each registered holder of a Right (except as provided below and in Section 7(e) hereof) shall thereafter have the right to receive, upon exercise thereof at the then current Purchase Price in accordance with the terms of this Agreement, in lieu of a number of one one-hundredths of a Preferred Share, such number of Common Shares of the Company as shall equal the result obtained by (A) multiplying the then current Purchase Price by the then number of one one-hundredths of a Preferred Share for which a Right was exercisable immediately prior to the first occurrence of a Section 11(a)(ii) Event, and (B) dividing that product (which, following such first occurrence, shall thereafter be referred to as the “Purchase Price” for each Right and for all purposes of this Agreement) by 50% of the Current Market Price per Common Share on the date of such first occurrence (such number of shares, the “Adjustment Shares”).

(iii) In the event that (A) the number of Common Shares authorized by the Company’s First Amended and Restated Certificate of Incorporation (as such may be amended, modified or restated from time to time, the “Certificate of Incorporation”), but which are not outstanding or reserved for issuance for purposes other than upon exercise of the Rights, are not sufficient to permit the exercise in full of the Rights in accordance with Section 11(a)(ii) hereof or (B) the Board of Directors of the Company otherwise shall determine to do so in its sole discretion, the Company, acting by resolution of the Board of Directors of the Company, shall (1) determine the value of the Adjustment Shares issuable upon the exercise of a Right (the “Current Value”), and (2) with respect to each Right (subject to Section 7(e) hereof), make adequate provision to substitute for the Adjustment Shares, upon the exercise of such Right and payment of the applicable Purchase Price, (i) cash, (ii) a reduction in the Purchase Price, (iii) Common Shares or other equity securities of the Company (including, without limitation, shares, or units of shares, of preferred stock, such as the Preferred Shares, which the Board of Directors of the Company has deemed to have essentially the same value or economic rights as Common Shares (such shares of preferred stock being referred to as “Common Stock Equivalents”)), (iv) debt securities of the Company, (v) other assets, or (vi) any combination of the foregoing, having an aggregate value equal to the Current Value, where such aggregate value has been determined by the Board of Directors of the Company based upon the advice of a nationally recognized investment banking firm selected by the Board of Directors of the Company; provided, however, that if, under the circumstances set forth in clause (A) above, the Company shall not have made adequate provision to deliver value pursuant to clause (2) above within 30 days following the later of (x) the first occurrence of a Section 11(a)(ii) Event and (y) the date on which the Company’s right of redemption pursuant to Section 23(a) hereof expires (the later of (x) and (y) being referred to herein as the “Section 11(a)(ii) Trigger Date”), then the Company shall be obligated to deliver, upon the surrender for exercise of a Right and without requiring payment of the Purchase Price, Common Shares (to the extent available) and then, if necessary, cash, which shares and cash have an aggregate value equal to the Spread. For purposes of the preceding sentence, the term “Spread” shall mean the excess of the Current Value over the Purchase Price. If the Board of Directors of the Company determines in good faith that it is likely that sufficient additional Common Shares could be authorized for issuance

upon exercise in full of the Rights, the 30-day period set forth above may be extended to the extent necessary, but not more than 90 days after the Section 11(a)(ii) Trigger Date, in order that the Company may seek stockholder approval for the authorization of such additional shares (such 30-day period, as it may be extended, is herein called the “Substitution Period”). To the extent that action is to be taken pursuant to the first or third sentences of this Section 11(a)(iii), the Company (I) shall provide, subject to Section 7(e) hereof, that such action shall apply uniformly to all outstanding Rights, and (II) may suspend the exercisability of the Rights until the expiration of the Substitution Period in order to seek such stockholder approval for such authorization of additional shares or to decide the appropriate form of distribution to be made pursuant to such first sentence and to determine the value thereof. In the event of any such suspension, the Company shall issue a public announcement stating that the exercisability of the Rights has been temporarily suspended, as well as a public announcement at such time as the suspension is no longer in effect. For purposes of this Section 11(a)(iii), the value of each Adjustment Share shall be the Current Market Price per Common Share on the Section 11(a)(ii) Trigger Date and the per share or per unit value of any Common Stock Equivalent shall be deemed to equal the Current Market Price per Common Share on such date.

(b) In case the Company shall fix a record date for the issuance of rights, options, or warrants to all registered holders of Preferred Shares entitling them to subscribe for or purchase (for a period expiring within 45 calendar days after such record date) Preferred Shares (or shares having the same rights, privileges, and preferences as the Preferred Shares (“Equivalent Preferred Shares”)) or securities convertible into Preferred Shares or Equivalent Preferred Shares at a price per Preferred Share or Equivalent Preferred Share (or having a conversion price per share, if a security convertible into Preferred Shares or Equivalent Preferred Shares) less than the Current Market Price per Preferred Share on such record date, the Purchase Price to be in effect after such record date shall be determined by multiplying the Purchase Price in effect immediately prior to such record date by a fraction, the numerator of which shall be the number of Preferred Shares outstanding on such record date plus the number of Preferred Shares that the aggregate subscription or offering price of the total number of Preferred Shares or Equivalent Preferred Shares so to be offered (or the aggregate initial conversion price of the convertible securities so to be offered) would purchase at such Current Market Price, and the denominator of which shall be the number of Preferred Shares outstanding on such record date plus the number of additional Preferred Shares or Equivalent Preferred Shares to be offered for subscription or purchase (or into which the convertible securities so to be offered are initially convertible). In case such subscription price may be paid by delivery of consideration, part or all of which may be in a form other than cash, the value of such consideration shall be as determined in good faith by the Board of Directors of the Company, whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes. Preferred Shares owned by or held for the account of the Company shall not be deemed outstanding for the purpose of any such computation. Such adjustments shall be made successively whenever such a record date is fixed, and in the event that such rights, options, or warrants are not so issued, the Purchase Price shall be adjusted to be the Purchase Price that would then be in effect if such record date had not been fixed.

(c) In case the Company shall fix a record date for a distribution to all registered holders of Preferred Shares (including any such distribution made in connection with a consolidation or merger in which the Company is the continuing or surviving corporation) of

cash (other than a regular periodic cash dividend out of the earnings or retained earnings of the Company), assets (other than a dividend payable in Preferred Shares, but including any dividend payable in stock other than Preferred Shares) or evidences of indebtedness, or of subscription rights or warrants (excluding those referred to in Section 11(b) hereof), the Purchase Price to be in effect after such record date shall be determined by multiplying the Purchase Price in effect immediately prior to such record date by a fraction, the numerator of which shall be the Current Market Price per Preferred Share on such record date, less the fair market value (as determined in good faith by the Board of Directors of the Company, whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes) of the portion of the cash, assets or evidences of indebtedness so to be distributed, or of such subscription rights or warrants applicable to a Preferred Share, and the denominator of which shall be such Current Market Price per Preferred Share. Such adjustments shall be made successively whenever such a record date is fixed, and in the event that such distribution is not so made, the Purchase Price shall be adjusted to be the Purchase Price that would then be in effect if such record date had not been fixed.

(d) (i) For the purpose of any computation hereunder, other than computations made pursuant to Section 11(a)(iii) hereof, the “Current Market Price” per Common Share on any date shall be deemed to be the average of the daily closing prices per Common Share for the 30 consecutive Trading Days immediately prior to such date, and for purposes of computations made pursuant to Section 11(a)(iii) hereof, the “Current Market Price” per Common Share on any date shall be deemed to be the average of the daily closing prices per Common Share for the 10 consecutive Trading Days immediately following such date; provided, however, that in the event that the Current Market Price per Common Share is determined during a period following the announcement by the issuer of such Common Share of (A) a dividend or distribution on such Common Shares payable in Common Shares or securities convertible into such Common Shares (other than the Rights), or (B) any subdivision, combination, or reclassification of such Common Shares, and the ex-dividend date for such dividend or distribution, or the record date for such subdivision, combination, or reclassification shall not have occurred prior to the commencement of the requisite 30-Trading Day or 10-Trading Day period, as set forth above, then, and in each such case, the Current Market Price shall be properly adjusted to take into account ex-dividend trading. The closing price for each day shall be the last sale price, regular way, or, in case no such sale takes place on such day, the average of the closing bid and asked prices, regular way, in either case as reported in the principal consolidated transaction reporting system with respect to securities listed or admitted to trading on the NASDAQ Global Market or, if the Common Shares are not listed or admitted to trading on the NASDAQ Global Market, as reported in the principal consolidated transaction reporting system with respect to securities listed on the principal national securities exchange on which the Common Shares are listed or admitted to trading or, if the Common Shares are not listed or admitted to trading on any national securities exchange, the last quoted price or, if not so quoted, the average of the high bid and low asked prices in the over-the-counter market, as reported on a quotation system then in use, or, if on any such date the Common Shares are not so quoted, the average of the closing bid and asked prices as furnished by a professional market maker making a market in the Common Shares selected by the Board of Directors of the Company. If on any such date the Common Shares are not publicly held and are not so listed, admitted to trading, or quoted, and no market maker is making a market in the Common Shares, the “Current Market Price” per Common Share shall mean the fair value per share on such date as determined in good faith by the Board of Directors of the

Company, which determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes. The term “Trading Day” shall mean a day on which the principal national securities exchange on which the Common Shares are listed or admitted to trading is open for the transaction of business or, if the Common Shares are not listed or admitted to trading on any national securities exchange, a Business Day.

(ii) For the purpose of any computation hereunder, the “Current Market Price” per Preferred Share shall be determined in the same manner as set forth above for the Common Shares in Section 11(d)(i) hereof (other than the penultimate sentence thereof). If the Current Market Price per Preferred Share cannot be determined in the manner provided above or if the Preferred Shares are not publicly held or listed, admitted to trading, or quoted in a manner described in Section 11(d)(i) hereof, the Current Market Price per Preferred Share shall be conclusively deemed to be an amount equal to 100 (as such number may be appropriately adjusted for such events as stock splits, stock dividends, and recapitalizations with respect to the Common Shares occurring after the date of this Agreement) multiplied by the Current Market Price per Common Share. If neither the Common Shares nor the Preferred Shares are publicly held or listed, admitted to trading, or quoted, the “Current Market Price” per Preferred Share shall mean the fair value per share as determined in good faith by the Board of Directors of the Company, whose determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes. For all purposes of this Agreement, the Current Market Price of one one-hundredth of a Preferred Share shall be equal to the Current Market Price of one Preferred Share divided by 100.

(e) Anything herein to the contrary notwithstanding, no adjustment in the Purchase Price shall be required unless such adjustment would require an increase or decrease of at least 1% in the Purchase Price; provided, however, that any adjustments which by reason of this Section 11(e) are not required to be made shall be carried forward and taken into account in any subsequent adjustment. All calculations under this Section 11 shall be made to the nearest cent or to the nearest ten-thousandth of a Common Share or other share or one-millionth of a Preferred Share, as the case may be. Notwithstanding the first sentence of this Section 11(e), any adjustment required by this Section 11 shall be made no later than the earlier of (i) three years from the date of the transaction that mandates such adjustment and (ii) the Expiration Date.

(f) If as a result of an adjustment made pursuant to Section 11(a)(ii) or Section 13(a) hereof, the registered holder of any Right thereafter exercised shall become entitled to receive any shares of capital stock other than Preferred Shares, thereafter the number of such other shares so receivable upon exercise of any Right and the Purchase Price thereof shall be subject to adjustment from time to time in a manner and on terms as nearly equivalent as practicable to the provisions with respect to the Preferred Shares contained in Sections 11(a), (b), (c), (e), (g), (h), (i), (j), (k), and (m), and the provisions of Sections 7, 9, 10, 13, and 14 hereof with respect to the Preferred Shares shall apply on like terms to any such other shares.

(g) All Rights originally issued by the Company subsequent to any adjustment made to the Purchase Price hereunder shall evidence the right to purchase, at the adjusted Purchase Price, the number of one one-hundredths of a Preferred Share purchasable from time to time hereunder upon exercise of the Rights, all subject to further adjustment as provided herein.

(h) Unless the Company shall have exercised its election as provided in Section 11(i) hereof, upon each adjustment of the Purchase Price as a result of the calculations made in Section 11(b) and Section 11(c) hereof, each Right outstanding immediately prior to the making of such adjustment shall thereafter evidence the right to purchase, at the adjusted Purchase Price, that number of one one-hundredths of a Preferred Share (calculated to the nearest one-millionth) obtained by (i) multiplying (A) the number of one one-hundredths of a share covered by a Right immediately prior to this adjustment, by (B) the Purchase Price in effect immediately prior to such adjustment of the Purchase Price, and (ii) dividing the product so obtained by the Purchase Price in effect immediately after such adjustment of the Purchase Price.

(i) The Company may elect on or after the date of any adjustment of the Purchase Price to adjust the number of Rights, in lieu of any adjustment in the number of one one-hundredths of a Preferred Share purchasable upon the exercise of a Right pursuant to Section 11(h) hereof. Each of the Rights outstanding after the adjustment in the number of Rights shall be exercisable for the number of one one-hundredths of a Preferred Share for which a Right was exercisable immediately prior to such adjustment. Each Right held of record prior to such adjustment of the number of Rights shall become that number of Rights (calculated to the nearest one ten-thousandth) obtained by dividing the Purchase Price in effect immediately prior to adjustment of the Purchase Price by the Purchase Price in effect immediately after adjustment of the Purchase Price. The Company shall make a public announcement of its election to adjust the number of Rights, indicating the record date for the adjustment, and, if known at the time, the amount of the adjustment to be made. This record date may be the date on which the Purchase Price is adjusted or any day thereafter, but, if the Rights Certificates have been issued, shall be at least 10 days later than the date of the public announcement. If Rights Certificates have been issued, upon each adjustment of the number of Rights pursuant to this Section 11(i), the Company shall, as promptly as practicable, cause to be distributed to holders of record of Rights Certificates on such record date Rights Certificates evidencing, subject to Section 14 hereof, the additional Rights to which such holders shall be entitled as a result of such adjustment, or, at the option of the Company, shall cause to be distributed to such holders of record in substitution and replacement for the Rights Certificates held by such holders prior to the date of adjustment, and upon surrender thereof, if required by the Company, new Rights Certificates evidencing all the Rights to which such holders shall be entitled after such adjustment. Rights Certificates so to be distributed shall be issued, executed, and countersigned in the manner provided for herein (and may bear, at the option of the Company, the adjusted Purchase Price) and shall be registered in the names of the holders of record of Rights Certificates on the record date specified in the public announcement.

(j) Irrespective of any adjustment or change in the Purchase Price or the number of one one-hundredths of a Preferred Share issuable upon the exercise of the Rights, the Rights Certificates theretofore and thereafter issued may continue to express the Purchase Price per one one-hundredth of a share and the number of one one-hundredths of a share that were expressed in the initial Rights Certificates issued hereunder.

(k) Before taking any action that would cause an adjustment reducing the Purchase Price below the then stated value, if any, of the number of one one-hundredths of a Preferred Share issuable upon exercise of the Rights, the Company shall take any corporate action that may, in the opinion of its counsel, be necessary in order that the Company may validly and

legally issue, fully paid and nonassessable, such number of one one-hundredths of a Preferred Share at such adjusted Purchase Price.

(l) In any case in which this Section 11 shall require that an adjustment in the Purchase Price be made effective as of a record date for a specified event, the Company may elect to defer until the occurrence of such event the issuance to the registered holder of any Right exercised after such record date of the number of one one-hundredths of a Preferred Share and other capital stock or securities of the Company, if any, issuable upon such exercise over and above the number of one one-hundredths of a Preferred Share and other capital stock or securities of the Company, if any, issuable upon such exercise on the basis of the Purchase Price in effect prior to such adjustment; provided, however, that the Company shall deliver to such holder a due xxxx or other appropriate instrument evidencing such holder’s right to receive such additional shares (fractional or otherwise) or securities upon the occurrence of the event requiring such adjustment.

(m) Anything in this Section 11 to the contrary notwithstanding, the Company shall be entitled to make such reductions in the Purchase Price, in addition to those adjustments expressly required by this Section 11, as and to the extent that in its good faith judgment the Board of Directors of the Company shall determine to be advisable in order that any (i) consolidation or subdivision of the Preferred Shares, (ii) issuance wholly for cash of any Preferred Shares at less than the Current Market Price, (iii) issuance wholly for cash of Preferred Shares or securities that by their terms are convertible into or exchangeable for Preferred Shares, (iv) stock dividends, or (v) issuance of rights, options, or warrants referred to in this Section 11, hereafter made by the Company to registered holders of its Preferred Shares shall not be taxable to such stockholders.

(n) The Company covenants and agrees that it shall not, at any time after the Distribution Date, (i) consolidate with any other Person, (ii) merge with or into any other Person, or (iii) sell or transfer (or permit any Subsidiary to sell or transfer), in one transaction, or a series of related transactions, assets or earning power aggregating 50% or more of the assets or earning power of the Company and its Subsidiaries (taken as a whole and calculated on the basis of the Company’s most recent regularly prepared financial statements) to any other Person or Persons, if (A) at the time of or immediately after such consolidation, merger, sale, or transfer there are any charter or bylaw provisions, rights, warrants, or other instruments or securities outstanding or agreements in effect that would substantially diminish or otherwise eliminate the benefits intended to be afforded by the Rights or (B) prior to, simultaneously with, or immediately after such consolidation, merger, sale, or transfer, the stockholders of the Person who constitutes, or would constitute, the “Principal Party” for purposes of Section 13(a) hereof shall have received a distribution of Rights previously owned by such Person or any of its Affiliates and Associates.

(o) The Company covenants and agrees that, after the earlier of the Distribution Date or the Shares Acquisition Date, it will not, except as permitted by Section 23 or Section 27 hereof, take (or permit any Subsidiary to take) any action if at the time such action is taken it is reasonably foreseeable that such action will diminish substantially or otherwise eliminate the benefits intended to be afforded by the Rights.

(p) Anything in this Agreement to the contrary notwithstanding, in the event that the Company shall at any time after the Rights Dividend Declaration Date and prior to the Distribution Date (i) declare or pay a dividend on the outstanding Common Shares payable in Common Shares, (ii) subdivide or split the outstanding Common Shares, or (iii) combine or consolidate the outstanding Common Shares into a smaller number of shares, the number of Rights associated with each Common Share then outstanding, or issued or delivered thereafter but prior to the Distribution Date (or issued or delivered on or after the Distribution Date pursuant to Section 22 hereof), shall be proportionately adjusted so that the number of Rights thereafter associated with each Common Share following any such event shall equal the result obtained by multiplying the number of Rights associated with each Common Share immediately prior to such event by a fraction, the numerator of which shall be the total number of Common Shares outstanding immediately prior to the occurrence of the event and the denominator of which shall be the total number of Common Shares outstanding immediately following the occurrence of such event.

Section 12. Certificate of Adjusted Purchase Price or Number of Shares. Whenever an adjustment is made as provided in Section 11 or Section 13 hereof, the Company shall (a) promptly prepare a certificate setting forth such adjustment and a brief statement of the facts accounting for such adjustment, (b) promptly file with the Rights Agent, and with each transfer agent for the Preferred Shares and the Common Shares, a copy of such certificate, and (c) if a Distribution Date has occurred, mail a brief summary thereof to each registered holder of a Rights Certificate in accordance with Section 26 hereof. The Rights Agent shall be fully protected in relying on any such certificate and on any adjustment therein contained.

Section 13. Consolidation, Merger, or Sale or Transfer of Assets or Earning Power.

(a) In the event that, at any time after a Person has become an Acquiring Person, directly or indirectly,

(i) the Company shall consolidate with, or merge with and into, any other Person, and the Company shall not be the continuing or surviving corporation or other entity of such consolidation or merger;

(ii) any Person shall consolidate with, or merge with or into, the Company, and the Company shall be the continuing or surviving corporation of such consolidation or merger and, in connection with such consolidation or merger, all or part of the outstanding Common Shares shall be changed into or exchanged for stock or other securities of any other Person (or the Company) or cash or any other property; or

(iii) the Company shall sell or otherwise transfer (or one or more of its Subsidiaries shall sell or otherwise transfer), in one transaction or a series of related transactions, assets or earning power aggregating 50% or more of the assets or earning power of the Company and its Subsidiaries (taken as a whole and calculated on the basis of the Company’s most recent regularly prepared financial statements) to any Person or Persons;

then, and in each such case, proper provision shall be made so that: (A) each registered holder of a Right, except as provided in Section 7(e) hereof, shall thereafter have the right to receive, upon

the exercise thereof at the then current Purchase Price in accordance with the terms of this Agreement, such number of validly authorized and issued, fully paid, non-assessable and freely tradeable Common Shares of the Principal Party, not subject to any liens, encumbrances, rights of first refusal, or other adverse claims, as shall be equal to the result obtained by (1) multiplying the number of one one-hundredths of a Preferred Share for which a Right was exercisable immediately prior to the first occurrence of a Section 11(a)(ii) Event by the Purchase Price in effect immediately prior to such first occurrence of a Section 11(a)(ii) Event, and (2) dividing that product (which, following the first occurrence of a Section 13 Event, shall be referred to as the “Purchase Price” for each Right and for all purposes of this Agreement) by 50% of the Current Market Price per Common Share of such Principal Party on the date of consummation of such Section 13 Event; (B) such Principal Party shall thereafter be liable for, and shall assume, by virtue of such Section 13 Event, all the obligations and duties of the Company pursuant to this Agreement; (C) the term “Company” shall thereafter be deemed to refer to such Principal Party, it being specifically intended that the provisions of Section 11 hereof shall apply only to such Principal Party following the first occurrence of a Section 13 Event; (D) such Principal Party shall take such steps (including, but not limited to, the reservation of a sufficient number of Common Shares) in connection with the consummation of any such transaction as may be necessary to assure that the provisions hereof shall thereafter be applicable, as nearly as reasonably may be, in relation to its Common Shares thereafter deliverable upon the exercise of the Rights; and (E) the provisions of Section 11(a)(ii) hereof shall be of no effect with respect to events occurring at any time following the first occurrence of any Section 13 Event.

(b) “Principal Party” shall mean:

(i) in the case of any transaction described in Section 13(a)(i) or Section 13(a)(ii) hereof, the Person that is the issuer of any securities into which Common Shares of the Company are converted, changed, or exchanged in such merger or consolidation, or if no securities are so issued, the Person that is the other party to such merger or consolidation; and

(ii) in the case of any transaction described in Section 13(a)(iii) hereof, the Person that is the party receiving the greatest portion of the assets or earning power transferred pursuant to such transaction or transactions or, if each Person that is a party to such transaction or transactions receives the same portion of the assets or earning power transferred pursuant to such transaction or transactions or if the Person receiving the largest portion of the assets or earning power cannot be determined, whichever of such Persons is the issuer of Common Shares having the greatest aggregate value of shares outstanding; provided, however, that in any such case, (A) if the Common Shares of such Person are not at such time and have not been continuously over the preceding 12-month period registered under Section 12 of the Exchange Act, and such Person is a direct or indirect Subsidiary of another Person the Common Shares of which are and have been so registered, “Principal Party” shall refer to such other Person; and (B) in case such Person is a Subsidiary, directly or indirectly, of more than one Person, the Common Shares of two or more of which are and have been so registered, “Principal Party” shall refer to whichever of such Persons is the issuer of the Common Shares having the greatest aggregate market value.

(c) The Company shall not consummate a Section 13 Event unless the Principal Party shall have a sufficient number of authorized Common Shares that have not been issued or

reserved for issuance to permit the exercise in full of the Rights in accordance with this Section 13 and unless prior thereto the Company and such Principal Party shall have executed and delivered to the Rights Agent a supplemental agreement confirming that the requirements of Section 13(a) and Section 13(b) hereof shall promptly be performed in accordance with their terms and further providing that, as soon as practicable after the date of any such Section 13 Event, the Principal Party will:

(i) prepare and file a registration statement under the Act, with respect to the Rights and the securities purchasable upon exercise of the Rights on an appropriate form, and will use its best efforts to cause such registration statement to (A) become effective as soon as practicable after such filing and (B) remain effective (with a prospectus at all times meeting the requirements of the Act) until the Expiration Date;

(ii) take all such other action as may be necessary to enable the Principal Party to issue the securities purchasable upon exercise of the Rights, including but not limited to the registration or qualification of such securities under all requisite securities laws of jurisdictions of the various states and the listing of such securities on such exchanges and trading markets as may be necessary or appropriate; and

(iii) deliver to registered holders of the Rights historical financial statements for the Principal Party and each of its Affiliates that comply in all respects with the requirements for registration on Form 10 (or any successor form) under the Exchange Act.

The provisions of this Section 13 shall similarly apply to successive mergers or consolidations or sales or other transfers. In the event that a Section 13 Event shall occur at any time after the occurrence of a Section 11(a)(ii) Event, the Rights that have not theretofore been exercised shall thereafter become exercisable in the manner described in Section 13(a) hereof.

Section 14. Fractional Rights and Fractional Shares.

(a) The Company shall not be required to issue fractions of Rights, except prior to the Distribution Date as provided in Section 11(p) hereof, or to distribute Rights Certificates that evidence fractional Rights. In lieu of such fractional Rights, the Company shall pay to the registered holders of the Rights Certificates with regard to which such fractional Rights would otherwise be issuable, an amount in cash equal to the same fraction of the current market value of a whole Right. For purposes of this Section 14(a), the current market value of a whole Right shall be the closing price of the Rights for the Trading Day immediately prior to the date on which such fractional Rights would have been otherwise issuable. The closing price of the Rights for any Trading Day shall be the last sale price, regular way, or, in case no such sale takes place on such day, the average of the closing bid and asked prices, regular way, in either case as reported in the principal consolidated transaction reporting system with respect to securities listed or admitted to trading on the NASDAQ Global Market or, if the Rights are not listed or admitted to trading on the NASDAQ Global Market, as reported in the principal consolidated transaction reporting system with respect to securities listed on the principal national securities exchange on which the Rights are listed or admitted to trading, or if the Rights are not listed or admitted to trading on any national securities exchange, the last quoted price or, if not so quoted, the average of the high bid and low asked prices in the over-the-counter market, as reported by a

quotation system then in use or, if on any such date the Rights are not so quoted, the average of the closing bid and asked prices as furnished by a professional market maker making a market in the Rights, selected by the Board of Directors of the Company. If on any such date the Rights are not publicly held and are not so listed, admitted to trading, or quoted, and no market maker is making a market in the Rights, the current market value of a Right shall mean the fair value of a Right on such date as determined in good faith by the Board of Directors of the Company, which determination shall be described in a statement filed with the Rights Agent and shall be conclusive for all purposes.

(b) The Company shall not be required to issue fractions of Preferred Shares (other than fractions that are integral multiples of one one-hundredth of a Preferred Share) upon exercise of the Rights or to distribute certificates that evidence fractional Preferred Shares (other than fractions that are integral multiples of one one-hundredth of a Preferred Share). In lieu of fractional Preferred Shares that are not integral multiples of one one-hundredth of a Preferred Share, the Company may pay to the registered holders of Rights Certificates at the time such Rights are exercised as herein provided an amount in cash equal to the same fraction of the current market value of one one-hundredth of a Preferred Share. For purposes of this Section 14(b), the current market value of one one-hundredth of a Preferred Share shall be one one-hundredth of the closing price of a Preferred Share or, if unavailable, the appropriate alternative price (in each case, as determined pursuant to Section 11(d)(ii) hereof) for the Trading Day immediately prior to the date of such exercise.

(c) Following the occurrence of a Triggering Event, the Company shall not be required to issue fractions of Common Shares upon exercise of the Rights or to distribute certificates that evidence fractional Common Shares. In lieu of fractional Common Shares, the Company may pay to the registered holders of Rights Certificates at the time such Rights are exercised as herein provided an amount in cash equal to the same fraction of the current market value of one Common Share. For purposes of this Section 14(c), the current market value of one Common Share shall be the closing price of one Common Share or, if unavailable, the appropriate alternative price (in each case, as determined pursuant to Section 11(d)(i) hereof) on the Trading Day immediately prior to the date of such exercise.

(d) The registered holder of a Right by the acceptance of that Right expressly waives such holder’s right to receive any fractional Rights or any fractional shares upon exercise of a Right, except as permitted by this Section 14.

Section 15. Rights of Action. All rights of action in respect of this Agreement, excepting the rights of action given to the Rights Agent under Section 18 hereof, are vested in the respective registered holders of the Rights Certificates (and, prior to the Distribution Date, of the Common Shares); and any registered holder of any Rights Certificate (and, prior to the Distribution Date, of the Common Shares), without the consent of the Rights Agent or of the registered holder of any other Rights Certificate (or, prior to the Distribution Date, of the Common Shares), may, on such first holder’s own behalf and for such first holder’s own benefit, enforce, and may institute and maintain any suit, action, or proceeding against the Company to enforce, or otherwise act in respect of, such first holder’s right to exercise the Rights evidenced by such Rights Certificate in the manner provided in such Rights Certificate and in this Agreement. Without limiting the foregoing or any remedies available to the registered holders of

Rights, it is specifically acknowledged that the registered holders of Rights would not have an adequate remedy at law for any breach of this Agreement and shall be entitled to specific performance of the obligations hereunder and injunctive relief against actual or threatened violations of the obligations hereunder of any Person subject to this Agreement.

Section 16. Agreement of Rights Holders. Every registered holder of a Right, by accepting the same, consents and agrees with the Company and the Rights Agent and with every other registered holder of a Right that:

(a) prior to the Distribution Date, the Rights will be transferable only in connection with the transfer of Common Shares;

(b) after the Distribution Date, the Rights Certificates are transferable only on the registry books of the Rights Agent if surrendered at the principal office or offices of the Rights Agent designated for such purposes, duly endorsed or accompanied by a proper instrument of transfer and with the appropriate forms and certificates contained therein duly executed;

(c) subject to Section 6(a) and Section 7(f) hereof, the Company and the Rights Agent may deem and treat the Person in whose name a Rights Certificate (or, prior to the Distribution Date, a Common Share certificate or Ownership Statement) is registered as the absolute owner thereof and of the Rights evidenced thereby (notwithstanding any notations of ownership or writing on the Rights Certificates or the Common Share certificate or Ownership Statement made by anyone other than the Company or the Rights Agent) for all purposes whatsoever, and neither the Company nor the Rights Agent, subject to the last sentence of Section 7(e) hereof, shall be required to be affected by any notice to the contrary; and

(d) notwithstanding anything in this Agreement to the contrary, neither the Company nor the Rights Agent shall have any liability to any registered holder of a Right or other Person as a result of its inability to perform any of its obligations under this Agreement by reason of any preliminary or permanent injunction or other order, decree, or ruling issued by a court of competent jurisdiction or by a governmental, regulatory, or administrative agency or commission, or any statute, rule, regulation, or executive order promulgated or enacted by any governmental authority, prohibiting or otherwise restraining performance of such obligation; provided, however, the Company must use its best efforts to have any such order, decree, or ruling lifted or otherwise overturned as soon as possible.

Section 17. Rights Certificate Holder Not Deemed a Stockholder. No registered holder, as such, of any Rights Certificate shall be entitled to vote, receive dividends, or be deemed for any purpose the registered holder of the number of one one-hundredths of a Preferred Share or any other securities of the Company that may at any time be issuable on the exercise of the Rights evidenced thereby, nor shall anything contained herein or in any Rights Certificate be construed to confer upon the registered holder of any Rights Certificate, as such, any of the rights of a stockholder of the Company or any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to give or withhold consent to any corporate action, or to receive notice of meetings or other actions affecting stockholders (except as provided in Section 25 hereof), or to receive dividends or subscription rights, or otherwise,

until the Right or Rights evidenced by such Rights Certificate shall have been exercised in accordance with the provisions hereof.

Section 18. Concerning the Rights Agent.

(a) The Company agrees to pay to the Rights Agent reasonable compensation for all services rendered by it hereunder and, from time to time, on demand of the Rights Agent, reimbursement for its reasonable expenses and counsel fees and disbursements and other disbursements incurred in the administration and execution of this Agreement and the exercise and performance of its duties hereunder. The Company also agrees to indemnify the Rights Agent for, and to hold it harmless against, any loss, liability, or expense, incurred without gross negligence, bad faith, or willful misconduct on the part of the Rights Agent, for anything done or omitted by the Rights Agent in connection with the acceptance and administration of this Agreement, including the costs and expenses of defending against any claim of liability in the premises.

(b) The Rights Agent shall be protected and shall incur no liability for or in respect of any action taken, suffered, or omitted by it in connection with its administration of this Agreement in reliance upon any Rights Certificate or certificate for Common Shares or for other securities of the Company, instrument of assignment or transfer, power of attorney, endorsement, affidavit, letter, notice, direction, consent, certificate, statement, or other paper or document believed by it to be genuine and to have been signed, executed and, where necessary, verified or acknowledged, by the proper Person or Persons.

Section 19. Merger or Consolidation or Change of Name of the Rights Agent.

(a) Any Person into which the Rights Agent or any successor Rights Agent may be merged or with which it may be consolidated, or any Person resulting from any merger or consolidation to which the Rights Agent or any successor Rights Agent shall be a party, or any Person succeeding to the corporate trust, stock transfer, or other shareholder services business of the Rights Agent or any successor Rights Agent, shall be the successor to the Rights Agent under this Agreement without the execution or filing of any paper or any further act on the part of any of the parties hereto; but only if such Person would be eligible for appointment as a successor Rights Agent under the provisions of Section 21 hereof. In case at the time such successor Rights Agent shall succeed to the agency created by this Agreement, any of the Rights Certificates shall have been countersigned but not delivered, any such successor Rights Agent may adopt the countersignature of an authorized signatory of a predecessor Rights Agent and deliver such Rights Certificates so countersigned; and in case at that time any of the Rights Certificates shall not have been countersigned, an authorized signatory of any successor Rights Agent may countersign such Rights Certificates either in the name of the predecessor or in the name of the successor Rights Agent; and in all such cases such Rights Certificates shall have the full force provided in the Rights Certificates and in this Agreement.

(b) In case at any time the name of the Rights Agent shall be changed and at such time any of the Rights Certificates shall have been countersigned but not delivered, the Rights Agent may adopt the countersignature of an authorized signatory under the Rights Agent’s prior name and deliver Rights Certificates so countersigned; and in case at that time any of the Rights

Certificates shall not have been countersigned, an authorized signatory of the Rights Agent may countersign such Rights Certificates either in the prior name of the Rights Agent or in the changed name of the Rights Agent; and in all such cases such Rights Certificates shall have the full force provided in the Rights Certificates and in this Agreement.

Section 20. Duties of the Rights Agent. The Rights Agent undertakes the duties and obligations imposed by this Agreement upon the following terms and conditions, by all of which the Company and the registered holders of Rights Certificates, by their acceptance thereof, shall be bound:

(a) The Rights Agent may consult with legal counsel (who may be legal counsel for the Company), and the opinion of such counsel shall be full and complete authorization and protection to the Rights Agent as to any action taken or omitted by it in good faith and in accordance with such opinion.

(b) Whenever in the performance of its duties under this Agreement the Rights Agent shall deem it necessary or desirable that any fact or matter (including, without limitation, the identity of any Acquiring Person and the determination of Current Market Price) be proved or established by the Company prior to taking or suffering any action hereunder, such fact or matter (unless other evidence in respect thereof be herein specifically prescribed) may be deemed to be conclusively proved and established by a certificate signed by the Chairman of the Board, the Chief Executive Officer, the President, any Vice President, the Secretary, any Assistant Secretary, the Treasurer, or any Assistant Treasurer of the Company and delivered to the Rights Agent; and such certificate shall be full authorization to the Rights Agent for any action taken or suffered in good faith by it under the provisions of this Agreement in reliance upon such certificate.

(c) The Rights Agent shall be liable hereunder only for its own gross negligence, bad faith, or willful misconduct.

(d) The Rights Agent shall not be liable for or by reason of any of the statements of fact or recital contained in this Agreement or in the Rights Certificates and it shall not be required to verify the same (except as to a countersignature by one of its authorized signatories on such Rights Certificates), but all such statements and recital are and shall be deemed to have been made by the Company only.

(e) The Rights Agent shall not be under any responsibility in respect of the validity of this Agreement or the execution and delivery hereof (except the due execution and delivery hereof by the Rights Agent) or in respect of the validity or execution of any Rights Certificate (except a countersignature by one of its authorized signatories on any such Rights Certificate); nor shall it be responsible for any breach by the Company of any covenant or condition contained in this Agreement or in any Rights Certificate; nor shall it be responsible for any adjustment required under the provisions of Section 11, Section 13, or Section 24 hereof or responsible for the manner, method, or amount of any such adjustment or the ascertaining of the existence of facts that would require any such adjustment (except with respect to the exercise of Rights evidenced by Rights Certificates after actual notice of any such adjustment); nor shall it by any act hereunder be deemed to make any representation or warranty as to the authorization

or reservation of any Common Shares or Preferred Shares to be issued pursuant to this Agreement or any Rights Certificate or as to whether any Common Shares or Preferred Shares will, when so issued, be validly authorized and issued, fully paid, and nonassessable.

(f) The Company agrees that it will perform, execute, acknowledge, and deliver or cause to be performed, executed, acknowledged, and delivered all such further and other acts, instruments, and assurances as may reasonably be required by the Rights Agent for the carrying out or performing by the Rights Agent of the provisions of this Agreement.

(g) The Rights Agent is hereby authorized and directed to accept instructions with respect to the performance of its duties hereunder from the Chairman of the Board, the Chief Executive Officer, the President, any Vice President, the Secretary, any Assistant Secretary, the Treasurer, or any Assistant Treasurer of the Company, and to apply to such officers for advice or instructions in connection with its duties, and it shall not be liable for any action taken or suffered to be taken by it in good faith in accordance with instructions of any such officer.

(h) The Rights Agent and any stockholder, director, officer, or employee of the Rights Agent may buy, sell, or deal in any of the Rights or other securities of the Company or become pecuniarily interested in any transaction in which the Company may be interested, or contract with or lend money to the Company or otherwise act as fully and freely as though it were not the Rights Agent under this Agreement. Nothing herein shall preclude the Rights Agent from acting in any other capacity for the Company or for any other legal entity.

(i) The Rights Agent may execute and exercise any of the rights or powers hereby vested in it or perform any duty hereunder either itself or by or through its attorneys or agents, and the Rights Agent shall not be answerable or accountable for any act, default, neglect, or misconduct of any such attorneys or agents or for any loss to the Company resulting from any such act, default, neglect, or misconduct; provided, however, that reasonable care was exercised in the selection and continued employment thereof.

(j) No provision of this Agreement shall require the Rights Agent to expend or risk its own funds or otherwise incur any financial liability in the performance of any of its duties hereunder or in the exercise of its rights if there shall be reasonable grounds for believing that repayment of such funds or adequate indemnification against such risk or liability is not reasonably assured to it.

(k) If, with respect to any Rights Certificate surrendered to the Rights Agent for exercise or transfer, the certificate contained in the form of assignment or form of election to purchase, as the case may be, has either not been completed or indicates an affirmative response to clause 1 or 2 thereof, the Rights Agent shall not take any further action with respect to such requested exercise or transfer without first consulting with the Company.

Section 21. Change of the Rights Agent. The Rights Agent or any successor Rights Agent may resign and be discharged from its duties under this Agreement upon 30 days’ notice given to the Company in accordance with Section 26 hereof, and to each transfer agent of the Common Shares and Preferred Shares by registered or certified mail in the event that the Rights Agent or one of its Affiliates is not also the transfer agent for the Company. In the event the

transfer agency relationship in effect between the Company and the Rights Agent terminates, the Rights Agent will be deemed to have resigned automatically and be discharged from its duties under this Agreement as of the effective date of such termination, and the Company shall be responsible for sending any required notice. The Company may remove the Rights Agent or any successor Rights Agent upon 30 days’ notice given to the Rights Agent or successor Rights Agent, as the case may be, in accordance with Section 26 hereof, and to each transfer agent of the Common Shares and Preferred Shares by registered or certified mail, and, if such removal occurs after the Distribution Date, to the registered holders of the Rights Certificates in accordance with Section 26 hereof. If the Rights Agent shall resign or be removed or shall otherwise become incapable of acting, the Company shall appoint a successor to the Rights Agent. If the Company shall fail to make such appointment within a period of 30 days after giving proper notice of such removal or after it has been properly notified of such resignation or incapacity by the resigning or incapacitated Rights Agent or by the registered holder of a Rights Certificate (who shall, with such notice, submit such holder’s Rights Certificate for inspection by the Company), then any registered holder of any Rights Certificate may apply to any court of competent jurisdiction for the appointment of a new Rights Agent. Any successor Rights Agent, whether appointed by the Company or by such a court, shall be (a) a legal business entity organized and doing business under the laws of the United States or of any state of the United States, in good standing, which is authorized under such laws to exercise corporate trust, stock transfer, or shareholder services powers and which has at the time of its appointment as Rights Agent a combined capital and surplus of at least $50 million or (b) an Affiliate of a legal business entity described in clause (a) of this sentence. After appointment, the successor Rights Agent shall be vested with the same powers, rights, duties, and responsibilities as if it had been originally named as Rights Agent without further act or deed; but the predecessor Rights Agent shall deliver and transfer to the successor Rights Agent any property at the time held by it hereunder, and execute and deliver any further assurance, conveyance, act, or deed necessary for that purpose. Not later than the effective date of any such appointment, the Company shall file notice thereof in writing with the predecessor Rights Agent and each transfer agent of the Common Shares and the Preferred Shares, and, if such appointment occurs after the Distribution Date, give notice thereof to the registered holders of the Rights Certificates in accordance with Section 26 hereof. Failure to give any notice provided for in this Section 21, however, or any defect therein, shall not affect the legality or validity of the resignation or removal of the Rights Agent or the appointment of the successor Rights Agent, as the case may be.

Section 22. Issuance of New Rights Certificates. Notwithstanding any of the provisions of this Agreement or of the Rights to the contrary, the Company may, at its option, issue new Rights Certificates evidencing Rights in such form as may be approved by the Board of Directors of the Company to reflect any adjustment or change in the Purchase Price and the number or kind or class of shares or other securities or property purchasable under the Rights Certificates made in accordance with the provisions of this Agreement. In addition, in connection with the issuance or sale of Common Shares following the Distribution Date and prior to the Expiration Date, the Company (a) shall, with respect to Common Shares so issued or sold pursuant to the exercise of stock options or under any employee plan or arrangement, granted or awarded as of the Distribution Date, or upon the exercise, conversion, or exchange of securities hereinafter issued by the Company, and (b) may, in any other case, if deemed necessary or appropriate by the Board of Directors of the Company, issue Rights Certificates evidencing the appropriate number of Rights in connection with such issuance or sale; provided, however, that (i) no such

Rights Certificate shall be issued if, and to the extent that, the Company shall be advised by counsel that such issuance would create a significant risk of material adverse tax consequences to the Company or the Person to whom such Rights Certificate would be issued, and (ii) no such Rights Certificate shall be issued if, and to the extent that, appropriate adjustment shall otherwise have been made in lieu of the issuance thereof.

Section 23. Redemption and Termination.

(a) The Board of Directors of the Company may, at its option, at any time prior to the earlier of (i) the time immediately prior to such time as any Person first becomes an Acquiring Person and (ii) the Final Expiration Date, direct the Company to, and if directed the Company shall, redeem all but not less than all of the then outstanding Rights at a redemption price of $0.01 per Right, as such amount may be appropriately adjusted to reflect any stock split, stock dividend, or similar transaction occurring after the date hereof (such redemption price being hereinafter referred to as the “Redemption Price”). The Company may, at its option, pay the Redemption Price in cash, Common Shares (based on the Current Market Price of the Common Shares at the time of redemption) or any other form of consideration deemed appropriate by the Board of Directors of the Company.

(b) Immediately upon the action of the Board of Directors of the Company directing the Company to redeem the Rights, evidence of which shall have been filed with the Rights Agent and without any further action and without any notice, the right to exercise the Rights will terminate and the only right thereafter of the registered holders of Rights shall be to receive the Redemption Price for each Right so held. Promptly after the action of the Board of Directors of the Company directing the Company to make the redemption of the Rights, the Company shall give notice of such redemption to the Rights Agent and the registered holders of the then outstanding Rights in accordance with Section 26 hereof. Any notice given in accordance with Section 26 hereof shall be deemed given whether or not the holder receives the notice. Each such notice of redemption will state the method by which the payment of the Redemption Price will be made.

Section 24. Exchange of Rights.

(a) The Board of Directors of the Company may, at its option, at any time after any Person becomes an Acquiring Person, direct the Company to, and if directed the Company shall, exchange all or part of the then outstanding and exercisable Rights (which shall not include Rights that have become void pursuant to the provisions of Section 7(e) hereof) for Common Shares at an exchange ratio of one Common Share per Right, appropriately adjusted to reflect any stock split, stock dividend, or similar transaction occurring after the date hereof (such exchange ratio being hereinafter referred to as the “Exchange Ratio”). The exchange of the Rights by the Board of Directors of the Company may be made effective at such time, on such basis and with such conditions as the Board of Directors of the Company in its sole discretion may establish.

(b) Immediately upon the action of the Board of Directors of the Company directing the Company to exchange any Rights pursuant to Section 24(a) hereof and without any further action and without any notice, the right to exercise such Rights shall terminate and the only right

thereafter of a registered holder of such Rights shall be to receive that number of Common Shares equal to the number of such Rights held by such holder multiplied by the Exchange Ratio. The Company shall promptly give public notice of any such exchange; provided, however, that the failure to give, or any defect in, such notice shall not affect the validity of such exchange. The Company promptly shall give notice of any such exchange to all of the registered holders of such Rights in accordance with Section 26 hereof. Any notice given in accordance with Section 26 hereof shall be deemed given whether or not the holder receives the notice. Each such notice of exchange will state the method by which the exchange of the Common Shares for Rights will be effected and, in the event of any partial exchange, the number of Rights that will be exchanged. Any partial exchange shall be effected pro rata based on the number of Rights (other than Rights that have become void pursuant to the provisions of Section 7(e) hereof) held by each registered holder of Rights.

(c) In any exchange pursuant to this Section 24, the Company, at its option, may substitute Preferred Shares (or Equivalent Preferred Shares, as such term is defined in Section 11(b) hereof) for Common Shares exchangeable for Rights, at the initial rate of one one-hundredth of a Preferred Share (or Equivalent Preferred Shares) for each Common Share, as appropriately adjusted to reflect stock splits, stock dividends, and other similar transactions after the date hereof.

(d) In the event the number of Common Shares authorized by the Company’s Certificate of Incorporation, but which are not outstanding or reserved for issuance for purposes other than upon exercise of the Rights, is not sufficient to permit any exchange of Rights as contemplated in accordance with this Section 24, the Company may take all such action as may be necessary to authorize additional Common Shares for issuance upon exchange of the Rights.

(e) The Company shall not be required to issue fractions of Common Shares or to distribute certificates that evidence fractional Common Shares. In lieu of such fractional Common Shares, there shall be paid to the registered holders of the Rights Certificates with regard to which such fractional Common Shares would otherwise be issuable, an amount in cash equal to the same fraction of the current market value of a whole Common Share. For the purposes of this Section 24(e), the current market value of a whole Common Share shall be the closing price of a Common Share (as determined pursuant to the second sentence of Section 11(d)(i) hereof) for the Trading Day immediately prior to the date of exchange pursuant to this Section 24.

(f) Prior to effecting an exchange pursuant to this Section 24, the Board of Directors of the Company may direct the Company to enter into a trust agreement in such form and with such terms as the Board of Directors of the Company shall then approve (the “Trust Agreement”). If the Board of Directors of the Company so directs, the Company shall enter into the Trust Agreement and shall issue to the trust created by such agreement (the “Trust”) all of the Common Shares, fractional Preferred Shares or other securities, if any, issuable pursuant to the exchange, and all Persons entitled to receive such shares or other securities (and any dividends or distributions made thereon after the date on which such shares or other securities are deposited in the Trust) shall be entitled to receive such only from the Trust and solely upon compliance with the relevant terms and provisions of the Trust Agreement.

Section 25. Notice of Certain Events.

(a) In case the Company shall propose, at any time after the Distribution Date, (i) to pay any dividend payable in stock of any class to the registered holders of Preferred Shares or to make any other distribution to the registered holders of Preferred Shares (other than a regular periodic cash dividend out of earnings or retained earnings of the Company), or (ii) to offer to the registered holders of Preferred Shares rights or warrants to subscribe for or to purchase any additional Preferred Shares or shares of stock of any class or any other securities, rights, or options, or (iii) to effect any reclassification of its Preferred Shares (other than a reclassification involving only the subdivision of outstanding Preferred Shares), or (iv) to effect any consolidation or merger into or with any other Person, or to effect any sale or other transfer (or to permit one or more of its Subsidiaries to effect any sale or other transfer), in one transaction or a series of related transactions, of 50% or more of the assets or earning power of the Company and its Subsidiaries (taken as a whole and calculated on the basis of the Company’s most recent regularly prepared financial statements) to any other Person or Persons, or (v) to effect the liquidation, dissolution, or winding up of the Company, then, in each such case, the Company shall give to each registered holder of a Rights Certificate, to the extent feasible and in accordance with Section 26 hereof, a notice of such proposed action, which shall specify the record date for the purposes of such stock dividend, distribution of rights or warrants, or the date on which such reclassification, consolidation, merger, sale, transfer, liquidation, dissolution, or winding up is to take place and the date of participation therein by the registered holders of the Preferred Shares, if any such date is to be fixed, and such notice shall be so given in the case of any action covered by clause (i) or (ii) above at least 20 days prior to the record date for determining registered holders of the Preferred Shares for purposes of such action, and in the case of any such other action, at least 20 days prior to the date of the taking of such proposed action or the date of participation therein by the registered holders of the Preferred Shares, whichever shall be the earlier.

(b) In case a Section 11(a)(ii) Event shall occur, then, in any such case, (i) the Company shall as soon as practicable thereafter give to each registered holder of a Rights Certificate, to the extent feasible and in accordance with Section 26 hereof, a notice of the occurrence of such event, which shall specify the event and the consequences of the event to registered holders of Rights under Section 11(a)(ii) hereof, and (ii) all references in Section 25(a) to Preferred Shares shall be deemed thereafter to refer to Common Shares or, if appropriate, other securities.

Section 26. Notices. Notices or demands authorized by this Agreement to be given or made by the Rights Agent or by the registered holder of any Rights Certificate to or on the Company shall be sufficiently given or made if sent by (a) first-class mail, postage prepaid, (b) overnight delivery, or (c) courier or messenger service, in each case addressed (until another address is filed in writing by the Company with the Rights Agent) as follows:

iBasis, Inc.
00 Xxxxxx Xxxxxx
Xxxxxxxxxx, XX 00000
Attention: Corporate Secretary
Telephone: (000) 000-0000

Subject to the provisions of Section 21 hereof, any notice or demand authorized by this Agreement to be given or made by the Company or by the registered holder of any Rights Certificate to or on the Rights Agent shall be sufficiently given or made if sent by (a) first-class mail, postage prepaid, (b) overnight delivery, or (c) courier or messenger service, in each case addressed (until another address is filed in writing by the Rights Agent with the Company) as follows:

Computershare Trust Company, N.A.
000 Xxxxxx Xxxxxx
Xxxxxx, XX 00000
Attention: Client Services
Telephone: (000) 000-0000

Notices or demands authorized by this Agreement to be given or made by the Company or the Rights Agent to the registered holder of any Rights Certificate (or, if prior to the Distribution Date, of the Common Shares) shall be sufficiently given or made if sent by first-class mail, postage prepaid, addressed to such holder at the address of such holder as shown on the registry books of the Rights Agent (or, if prior to the Distribution Date, of the transfer agent for the Common Shares).

Section 27. Supplements and Amendments. Except as otherwise provided in this Section 27, for so long as the Rights are then redeemable, the Company may in its sole and absolute discretion, and the Rights Agent shall if the Company so directs, supplement or amend any provisions of this Agreement in any respect without the approval of any holders of the Rights. At any time when the Rights are no longer redeemable, except as otherwise provided in this Section 27, the Company may, and the Rights Agent shall if the Company so directs, supplement or amend this Agreement without the approval of any holders of Rights in order to (i) cure any ambiguity, (ii) correct or supplement any provisions contained herein which may be defective or inconsistent with any other provisions herein, (iii) shorten or lengthen any time period hereunder, or (iv) change or supplement the provisions hereunder in any manner which the Company may deem necessary or desirable; provided, however, that no such supplement or amendment shall adversely affect the interests of the holders of Rights as such (other than an Acquiring Person or an Affiliate or Associate of an Acquiring Person or certain of their transferees), and no such amendment may cause the Rights again to become redeemable or cause this Agreement again to become amendable other than in accordance with this sentence. Notwithstanding anything contained in this Agreement to the contrary, no supplement or amendment shall be made which decreases the Redemption Price. Upon the delivery of a certificate from an appropriate officer of the Company which states that the supplement or amendment is in compliance with the terms of this Section 27, the Rights Agent shall execute such supplement or amendment, provided, that any such supplement or amendment does not adversely affect the rights, duties or obligations of the Rights Agent under this Agreement.

Section 28. Successors. All the covenants and provisions of this Agreement by or for the benefit of the Company or the Rights Agent shall bind and inure to the benefit of their respective successors and assigns hereunder.

Section 29. Determinations and Actions by the Board of Directors. For all purposes of this Agreement, any calculation of the number of Common Shares or any other class of capital stock outstanding at any particular time, including for purposes of determining the particular percentage of such outstanding Common Shares of which any Person is the Beneficial Owner, shall be made in accordance with the last sentence of Rule 13d-3(d)(1)(i) of the General Rules and Regulations under the Exchange Act as in effect on the date hereof. The Board of Directors of the Company shall have the exclusive power and authority to administer this Agreement and to exercise all rights and powers specifically granted to the Board of Directors of the Company or to the Company, or as may be necessary or advisable in the administration of this Agreement, including, without limitation, the right and power to (a) interpret the provisions of this Agreement and (b) make all determinations deemed necessary or advisable for the administration of this Agreement (including a determination to redeem or not redeem the Rights or to amend this Agreement). All such actions, calculations, interpretations, and determinations that are done or made by the Board of Directors of the Company in good faith shall be final, conclusive, and binding on the Company, the Rights Agent, the registered holders of the Rights, and all other parties.

Section 30. Benefits of this Agreement. Nothing in this Agreement shall be construed to give to any Person other than the Company, the Rights Agent, and the registered holders of the Rights Certificates (and, prior to the Distribution Date, of the Common Shares) any legal or equitable right, remedy, or claim under this Agreement; but this Agreement shall be for the sole and exclusive benefit of the Company, the Rights Agent, and the registered holders of the Rights Certificates (and, prior to the Distribution Date, of the Common Shares).

Section 31. Severability. If any term, provision, covenant, or restriction of this Agreement is held by a court of competent jurisdiction or other authority to be invalid, void, or unenforceable, the remainder of the terms, provisions, covenants, and restrictions of this Agreement shall remain in full force and effect and shall in no way be affected, impaired, or invalidated; provided, however, that notwithstanding anything in this Agreement to the contrary, if any such term, provision, covenant, or restriction is held by such court or authority to be invalid, void, or unenforceable and the Board of Directors of the Company determines in its good faith judgment that severing the invalid language from this Agreement would adversely affect the purpose or effect of this Agreement, the right of redemption set forth in Section 23 hereof shall be reinstated and shall not expire until the Close of Business on the tenth day following the date of such determination by the Board of Directors of the Company.

Section 32. Governing Law. This Agreement, each Right, and each Rights Certificate issued hereunder shall be deemed to be a contract made under the laws of the State of Delaware and for all purposes shall be governed by and construed in accordance with the laws of such State applicable to contracts made and to be performed entirely within such State.

Section 33. Counterparts; Facsimiles and PDFs. This Agreement may be executed in any number of counterparts and each of such counterparts shall for all purposes be deemed to be an original, and all such counterparts shall together constitute but one and the same instrument. A facsimile or ..pdf signature delivered electronically shall constitute an original signature for all purposes.

Section 34. Descriptive Headings. Descriptive headings of the several sections of this Agreement are inserted for convenience only and shall not control or affect the meaning or construction of any of the provisions hereof.

Section 35. Force Majeure Notwithstanding anything to the contrary contained herein, the Rights Agent shall not be liable for any delays or failures in performance resulting from acts beyond its reasonable control including, without limitation, acts of God, terrorist acts, shortage of supply, breakdowns or malfunctions, interruptions or malfunction of computer facilities, or loss of data due to power failures or mechanical difficulties with information storage or retrieval systems, labor difficulties, war, or civil unrest.

(Signature Page Follows.)

IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed as of the day and year first above written.

	iBASIS, INC.


	By:	/s/ Xxxx Xxxxxx

	Name:	Xxxx Xxxxxx

	Title:	President and Chief Executive Officer


	COMPUTERSHARE TRUST COMPANY, N.A.


	By:	/s/ Xxxxxxxxx Xxxxxxxx

	Name:	Xxxxxxxxx Xxxxxxxx

	Title:	Manager

Exhibit A

FORM OF
CERTIFICATE OF DESIGNATION, PREFERENCES, AND
RIGHTS OF SERIES A JUNIOR PARTICIPATING PREFERRED STOCK

iBASIS, INC.

Pursuant to Section 151 of the General Corporation Law of the State of Delaware, iBasis, Inc., a corporation organized and existing under the General Corporation Law of the State of Delaware (the “Corporation”), in accordance with the provisions of Section 103 thereof, DOES HEREBY CERTIFY:

That pursuant to the authority conferred upon the Board of Directors by the First Amended and Restated Certificate of Incorporation of the Corporation (as such may be amended, modified or restated from time to time, the “Certificate of Incorporation”), the said Board of Directors on July 30, 2009, adopted the following resolution creating a series of Preferred Stock designated as Series A Junior Participating Preferred Stock (as hereinafter defined):

RESOLVED, that pursuant to the authority vested in the Board of Directors of the Corporation in accordance with the provisions of its Certificate of Incorporation, a series of Preferred Stock of the Corporation be and it hereby is created, and that the designation and amount thereof and the voting powers, preferences and relative, participating, optional and other special rights of the shares of such series, and the qualifications, limitations, and restrictions thereof are as follows:

Section 1. Designation and Amount. The shares of such series shall be designated as “Series A Junior Participating Preferred Stock” and the number of shares constituting such series shall be 1,000,000.

Section 2. Dividends and Distributions.

(A) Subject to the prior and superior rights of the holders of any shares of any series of Preferred Stock ranking prior and superior to the shares of Series A Junior Participating Preferred Stock with respect to dividends, the holders of shares of Series A Junior Participating Preferred Stock, in preference to the holders of shares of Common Stock, par value $0.001 per share, of the Corporation (the “Common Stock”), and of any other junior stock, shall be entitled to receive, when, as and if declared by the Board of Directors out of funds legally available for the purpose, quarterly dividends payable in cash on the last day of March, June, September, and December in each year (each such date being referred to herein as a “Quarterly Dividend Payment Date”), commencing on the first Quarterly Dividend Payment Date after the first issuance of a share or fraction of a share of Series A Junior Participating Preferred Stock, in an amount per share (rounded to the nearest cent) equal to the greater of (a) $1.00 or (b) subject to the provision for adjustment hereinafter set forth, 100 times the aggregate per share amount of all cash dividends, and 100 times the aggregate per share amount (payable in kind) of all non-cash

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dividends or other distributions, other than a dividend payable in shares of Common Stock or a subdivision of the outstanding shares of Common Stock (by reclassification or otherwise), declared on the Common Stock since the immediately preceding Quarterly Dividend Payment Date, or, with respect to the first Quarterly Dividend Payment Date, since the first issuance of any share or fraction of a share of Series A Junior Participating Preferred Stock. In the event the Corporation shall at any time after July 30, 2009 (the “Rights Dividend Declaration Date”) (i) declare any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the amount to which holders of shares of Series A Junior Participating Preferred Stock were entitled immediately prior to such event under clause (b) of the preceding sentence shall be adjusted by multiplying such amount by a fraction the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event.

(B) The Corporation shall declare a dividend or distribution on the Series A Junior Participating Preferred Stock as provided in Paragraph (A) above immediately after it declares a dividend or distribution on the Common Stock (other than a dividend payable in shares of Common Stock); provided that, in the event no dividend or distribution shall have been declared on the Common Stock during the period between any Quarterly Dividend Payment Date and the next subsequent Quarterly Dividend Payment Date, a dividend of $1.00 per share on the Series A Junior Participating Preferred Stock shall nevertheless be payable on such subsequent Quarterly Dividend Payment Date.

(C) Dividends shall begin to accrue and be cumulative on outstanding shares of Series A Junior Participating Preferred Stock from the Quarterly Dividend Payment Date next preceding the date of issue of such shares of Series A Junior Participating Preferred Stock, unless the date of issue of such shares is prior to the record date for the first Quarterly Dividend Payment Date, in which case dividends on such shares shall begin to accrue from the date of issue of such shares, or unless the date of issue is a Quarterly Dividend Payment Date or is a date after the record date for the determination of holders of shares of Series A Junior Participating Preferred Stock entitled to receive a quarterly dividend and before such Quarterly Dividend Payment Date, in either of which events such dividends shall begin to accrue and be cumulative from such Quarterly Dividend Payment Date. Accrued but unpaid dividends shall not bear interest. Dividends paid on the shares of Series A Junior Participating Preferred Stock in an amount less than the total amount of such dividends at the time accrued and payable on such shares shall be allocated pro rata on a share-by-share basis among all such shares at the time outstanding. The Board of Directors may fix a record date for the determination of holders of shares of Series A Junior Participating Preferred Stock entitled to receive payment of a dividend or distribution declared thereon, which record date shall be no more than 30 days prior to the date fixed for the payment thereof.

Section 3. Voting Rights. The holders of shares of Series A Junior Participating Preferred Stock shall have the following voting rights:

(A) Subject to the provision for adjustment hereinafter set forth, each share of Series A Junior Participating Preferred Stock shall entitle the holder thereof to 100 votes on all

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matters submitted to a vote of the stockholders of the Corporation. In the event the Corporation shall at any time after the Rights Dividend Declaration Date (i) declare any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the number of votes per share to which holders of shares of Series A Junior Participating Preferred Stock were entitled immediately prior to such event shall be adjusted by multiplying such number by a fraction, the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event.

(B) Except as otherwise provided herein or by law, the holders of shares of Series A Junior Participating Preferred Stock and the holders of shares of Common Stock shall vote together as one class on all matters submitted to a vote of stockholders of the Corporation.

(C) (i) If at any time dividends on any Series A Junior Participating Preferred Stock shall be in arrears in an amount equal to six quarterly dividends thereon, the occurrence of such contingency shall xxxx the beginning of a period (herein called a “default period”) that shall extend until such time when all accrued and unpaid dividends for all previous quarterly dividend periods and for the current quarterly dividend period on all shares of Series A Junior Participating Preferred Stock then outstanding shall have been declared and paid or set apart for payment. During each default period, all holders of Preferred Stock (including holders of the Series A Junior Participating Preferred Stock) with dividends in arrears in an amount equal to six quarterly dividends thereon, voting as a class, irrespective of series, shall have the right to elect two directors.

(ii) During any default period, such voting right of the holders of Series A Junior Participating Preferred Stock may be exercised initially at a special meeting called pursuant to subparagraph (iii) of this Section 3(C) or at any annual meeting of stockholders, and thereafter at annual meetings of stockholders, provided that such voting right shall not be exercised unless the holders of 10% in number of shares of Preferred Stock outstanding shall be present in person or by proxy. The absence of a quorum of the holders of Common Stock shall not affect the exercise by the holders of Preferred Stock of such voting right. At any meeting at which the holders of Preferred Stock shall exercise such voting right initially during an existing default period, they shall have the right, voting as a class, to elect directors to fill such vacancies, if any, in the Board of Directors as may then exist up to two directors or, if such right is exercised at an annual meeting, to elect two directors. If the number that may be so elected at any special meeting does not amount to the required number, the holders of Preferred Stock shall have the right to make such increase in the number of directors as shall be necessary to permit the election by them of the required number. After the holders of Preferred Stock shall have exercised their right to elect directors in any default period and during the continuance of such period, the number of directors shall not be increased or decreased except by vote of the holders of Preferred Stock as herein provided or pursuant to the rights of any equity securities ranking senior to or pari passu with the Series A Junior Participating Preferred Stock.

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(iii) Unless the holders of Preferred Stock shall, during an existing default period, have previously exercised their right to elect directors, the Board of Directors may order, or any stockholder or stockholders owning in the aggregate not less than 10% of the total number of shares of Preferred Stock outstanding, irrespective of series, may request, the calling of a special meeting of the holders of Preferred Stock, which meeting shall thereupon be called by the President, a Vice-President, or the Secretary of the Corporation. Notice of such meeting and of any annual meeting at which holders of Preferred Stock are entitled to vote pursuant to this Paragraph (C)(iii) shall be given to each holder of record of Preferred Stock by mailing a copy of such notice to such holder at such holder’s last address as the same appears on the books of the Corporation. Such meeting shall be called for a time not earlier than 20 days and not later than 60 days after such order or request or in default of the calling of such meeting within 60 days after such order or request, such meeting may be called on similar notice by any stockholder or stockholders owning in the aggregate not less than 10% of the total number of shares of Preferred Stock outstanding. Notwithstanding the provisions of this Paragraph (C)(iii), no such special meeting shall be called during the period within 60 days immediately preceding the date fixed for the next annual meeting of the stockholders.

(iv) In any default period, the holders of Common Stock, and other classes of stock of the Corporation if applicable, shall continue to be entitled to elect the whole number of directors until the holders of Preferred Stock shall have exercised their right to elect two directors voting as a class, after the exercise of which right (x) the directors so elected by the holders of Preferred Stock shall continue in office until their successors shall have been elected by such holders or until the expiration of the default period, and (y) any vacancy in the Board of Directors may (except as provided in Paragraph (C)(ii) of this Section 3) be filled by vote of a majority of the remaining directors theretofore elected by the holders of the class of stock that elected the director whose office shall have become vacant. References in this Paragraph (C) to directors elected by the holders of a particular class of stock shall include directors elected by such directors to fill vacancies as provided in clause (y) of the foregoing sentence.

(v) Immediately upon the expiration of a default period, (x) the right of the holders of Preferred Stock as a class to elect directors shall cease, (y) the term of any directors elected by the holders of Preferred Stock as a class shall terminate, and (z) the number of directors shall be such number as may be provided for in the Certificate of Incorporation or Bylaws irrespective of any increase made pursuant to the provisions of Paragraph (C)(ii) of this Section 3 (such number being subject, however, to change thereafter in any manner provided by law or in the Certificate of Incorporation or Bylaws). Any vacancies in the Board of Directors effected by the provisions of clauses (y) and (z) in the preceding sentence may be filled by a majority of the remaining directors.

(D) Except as set forth herein, holders of Series A Junior Participating Preferred Stock shall have no special voting rights and their consent shall not be required (except to the extent they are entitled to vote with holders of Common Stock as set forth herein) for taking any corporate action.

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Section 4. Certain Restrictions.

(A) Whenever quarterly dividends or other dividends or distributions payable on the Series A Junior Participating Preferred Stock as provided in Section 2 are in arrears, thereafter and until all accrued and unpaid dividends and distributions, whether or not declared, on shares of Series A Junior Participating Preferred Stock outstanding shall have been paid in full, the Corporation shall not:

(i) declare or pay dividends on, or make any other distributions on, any shares of stock ranking junior (either as to dividends or upon liquidation, dissolution, or winding up) to the Series A Junior Participating Preferred Stock;

(ii) declare or pay dividends on, or make any other distributions on, any shares of stock ranking on a parity (either as to dividends or upon liquidation, dissolution, or winding up) with the Series A Junior Participating Preferred Stock, except dividends paid ratably on the Series A Junior Participating Preferred Stock and all such parity stock on which dividends are payable or in arrears in proportion to the total amounts to which the holders of all such shares are then entitled;

(iii) redeem or purchase or otherwise acquire for consideration shares of any stock ranking junior (either as to dividends or upon liquidation, dissolution, or winding up) to the Series A Junior Participating Preferred Stock, provided that the Corporation may at any time redeem, purchase, or otherwise acquire shares of any such junior stock in exchange for shares of any stock of the Corporation ranking junior (either as to dividends or upon dissolution, liquidation, or winding up) to the Series A Junior Participating Preferred Stock; or

(iv) redeem or purchase or otherwise acquire for consideration any shares of Series A Junior Participating Preferred Stock, or any shares of stock ranking on a parity with the Series A Junior Participating Preferred Stock, except in accordance with a purchase offer made in writing or by publication (as determined by the Board of Directors) to all holders of such shares upon such terms as the Board of Directors, after consideration of the respective annual dividend rates and other relative rights and preferences of the respective series and classes, shall determine in good faith will result in fair and equitable treatment among the respective series or classes.

(B) The Corporation shall not permit any subsidiary of the Corporation to purchase or otherwise acquire for consideration any shares of stock of the Corporation unless the Corporation could, under Paragraph (A) of this Section 4, purchase or otherwise acquire such shares at such time and in such manner.

Section 5. Reacquired Shares. Any shares of Series A Junior Participating Preferred Stock purchased or otherwise acquired by the Corporation in any manner whatsoever shall be retired and cancelled promptly after the acquisition thereof. All such shares shall upon their cancellation become authorized but unissued shares of Preferred Stock and may be reissued as part of a new series of Preferred Stock to be created by resolution or resolutions of the Board of Directors, subject to the conditions and restrictions on issuance set forth herein, in the Certificate

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of Incorporation, or in any other Certificate of Designation creating a series of Preferred Stock or any similar stock, or as otherwise required by law.

Section 6. Liquidation, Dissolution, or Winding Up.

(A) Upon any liquidation (voluntary or otherwise), dissolution, or winding up of the Corporation, no distribution shall be made to the holders of shares of stock ranking junior (either as to dividends or upon liquidation, dissolution, or winding up) to the Series A Junior Participating Preferred Stock unless, prior thereto, the holders of shares of Series A Junior Participating Preferred Stock shall have received an amount equal to $100 per share of Series A Participating Preferred Stock, plus an amount equal to accrued and unpaid dividends and distributions thereon, whether or not declared, to the date of such payment (the “Series A Liquidation Preference”). Following the payment of the full amount of the Series A Liquidation Preference, no additional distributions shall be made to the holders of shares of Series A Junior Participating Preferred Stock unless, prior thereto, the holders of shares of Common Stock shall have received an amount per share (the “Common Adjustment”) equal to the quotient obtained by dividing (i) the Series A Liquidation Preference by (ii) 100 (as appropriately adjusted as set forth in subparagraph (C) below to reflect such events as stock splits, stock dividends, and recapitalizations with respect to the Common Stock) (such number in clause (ii), the “Adjustment Number”). Following the payment of the full amount of the Series A Liquidation Preference and the Common Adjustment in respect of all outstanding shares of Series A Junior Participating Preferred Stock and Common Stock, respectively, holders of Series A Junior Participating Preferred Stock and holders of shares of Common Stock shall receive their ratable and proportionate share of the remaining assets to be distributed in the ratio of the Adjustment Number to one with respect to such Preferred Stock and Common Stock, on a per share basis, respectively.

(B) In the event, however, that there are not sufficient assets available to permit payment in full of the Series A Liquidation Preference and the liquidation preferences of all other series of preferred stock, if any, which rank on a parity with the Series A Junior Participating Preferred Stock, then such remaining assets shall be distributed ratably to the holders of such parity shares in proportion to their respective liquidation preferences.

(C) In the event the Corporation shall at any time after the Rights Dividend Declaration Date (i) declare any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the Adjustment Number in effect immediately prior to such event shall be adjusted by multiplying such Adjustment Number by a fraction, the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event.

Section 7. Consolidation, Merger, etc. In case the Corporation shall enter into any consolidation, merger, combination, or other transaction in which the shares of Common Stock are exchanged for or changed into other stock or securities, cash, or any other property, then in any such case the shares of Series A Junior Participating Preferred Stock shall at the same time be similarly exchanged or changed in an amount per share (subject to the provision for

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adjustment hereinafter set forth) equal to 100 times the aggregate amount of stock, securities, cash, or any other property (payable in kind), as the case may be, into which or for which each share of Common Stock is changed or exchanged. In the event the Corporation shall at any time after the Rights Dividend Declaration Date (i) declare any dividend on Common Stock payable in shares of Common Stock, (ii) subdivide the outstanding Common Stock, or (iii) combine the outstanding Common Stock into a smaller number of shares, then in each such case the amount set forth in the preceding sentence with respect to the exchange or change of shares of Series A Junior Participating Preferred Stock shall be adjusted by multiplying such amount by a fraction, the numerator of which is the number of shares of Common Stock outstanding immediately after such event and the denominator of which is the number of shares of Common Stock that were outstanding immediately prior to such event.

Section 8. No Redemption. The shares of Series A Junior Participating Preferred Stock shall not be redeemable.

Section 9. Ranking. The Series A Junior Participating Preferred Stock shall rank junior to all other series of the Corporation’s Preferred Stock as to the payment of dividends and the distribution of assets, unless the terms of any such series shall provide otherwise.

Section 10. Amendment. At any time when any shares of Series A Junior Participating Preferred Stock are outstanding, neither the Certificate of Incorporation of the Corporation nor this Certificate of Designation shall be amended in any manner that would materially alter or change the powers, preferences, or special rights of the Series A Junior Participating Preferred Stock so as to affect them adversely without the affirmative vote of the holders of two-thirds or more of the outstanding shares of Series A Junior Participating Preferred Stock, voting separately as a class.

Section 11. Fractional Shares. The Series A Junior Participating Preferred Stock may be issued in fractions of a share that shall entitle the holder, in proportion to such holder’s fractional shares, to exercise voting rights, receive dividends, participate in distributions, and to have the benefit of all other rights of holders of Series A Junior Participating Preferred Stock.

(Signature Page Follows.)

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IN WITNESS WHEREOF, iBasis, Inc. has caused this Certificate of Designation to be signed by the undersigned this 30th day of July, 2009.

	iBASIS, INC.


	By:
	Name:
	Title:

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Exhibit B

FORM OF RIGHTS CERTIFICATE

Certificate No. R-

Rights

NOT EXERCISABLE AFTER JULY 30, 2010 OR EARLIER IF REDEEMED OR EXCHANGED BY THE COMPANY. THE RIGHTS ARE SUBJECT TO REDEMPTION, AT THE OPTION OF THE COMPANY, AT $0.01 PER RIGHT ON THE TERMS SET FORTH IN THE RIGHTS AGREEMENT. UNDER CERTAIN CIRCUMSTANCES, RIGHTS BENEFICIALLY OWNED BY ANY PERSON WHO IS, WAS, OR BECOMES AN ACQUIRING PERSON OR ANY AFFILIATE OR ASSOCIATE THEREOF (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT), WHETHER CURRENTLY BENEFICIALLY OWNED BY OR ON BEHALF OF SUCH PERSON OR BY ANY SUBSEQUENT BENEFICIAL OWNER MAY BECOME NULL AND VOID.

Rights Certificate

iBASIS, INC.

This certifies that , or registered assigns, is the registered owner of the number of Rights set forth above, each of which entitles the owner thereof, subject to the terms, provisions and conditions of the Rights Agreement, dated as of July 30, 2009 (the “Rights Agreement”), between iBasis, Inc., a Delaware corporation (the “Company”), and Computershare Trust Company, N.A. (the “Rights Agent”), to purchase from the Company at any time prior to 5:00 P.M., New York City time, on July 30, 2010 at the office or offices of the Rights Agent designated for such purpose, or its successors as Rights Agent, one one-hundredth of a fully paid, non-assessable share of Series A Junior Participating Preferred Stock of the Company (a “Preferred Share”), at a purchase price of $10.00 per one one-hundredth of a share (such purchase price, as may be adjusted, the “Purchase Price”), upon presentation and surrender of this Rights Certificate with the Form of Election to Purchase and related Certificate duly executed. The number of Rights evidenced by this Rights Certificate (and the number of shares that may be purchased upon exercise thereof) set forth above, and the Purchase Price per share set forth above, are the number and Purchase Price as of July 30, 2009, based on the Preferred Shares as constituted at such date. The Company reserves the right to require prior to the occurrence of a Triggering Event (as such term is defined in the Rights Agreement) that a number of Rights be exercised so that only whole Preferred Shares will be issued.

Upon the occurrence of a Section 11(a)(ii) Event (as such term is defined in the Rights Agreement), if the Rights evidenced by this Rights Certificate are beneficially owned by (i) an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined in the Rights Agreement), (ii) a transferee of any such Acquiring Person, Associate, or Affiliate, or (iii) under certain circumstances specified in the Rights Agreement, a transferee of a person who, after such transfer, became an Acquiring Person, or an Affiliate or Associate of an

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Acquiring Person, such Rights shall become null and void and no holder hereof shall have any right with respect to such Rights from and after the occurrence of such Section 11(a)(ii) Event.

As provided in the Rights Agreement, the Purchase Price, the number and kind of Preferred Shares or other securities issuable upon exercise of a Right, and the number of Rights outstanding are subject to modification and adjustment upon the happening of certain events, including Triggering Events.

This Rights Certificate is subject to all of the terms, provisions, and conditions of the Rights Agreement, which terms, provisions, and conditions are hereby incorporated herein by reference and made a part hereof and to which Rights Agreement reference is hereby made for a full description of the rights, limitations of rights, obligations, duties, and immunities hereunder of the Rights Agent, the Company, and the holders of the Rights Certificates, which limitations of rights include the temporary suspension of the exercisability of such Rights under the specific circumstances set forth in the Rights Agreement. Copies of the Rights Agreement are on file at the above-mentioned office of the Rights Agent and are also available upon written request to the Rights Agent.

This Rights Certificate, with or without other Rights Certificates, upon surrender at the principal office or offices of the Rights Agent designated for such purpose, may be exchanged for another Rights Certificate or Rights Certificates of like tenor and date evidencing Rights entitling the holder to purchase a like aggregate number of one one-hundredths of a Preferred Share as the Rights evidenced by the Rights Certificate or Rights Certificates surrendered shall have entitled such holder to purchase. If this Rights Certificate shall be exercised in part, the holder shall be entitled to receive upon surrender hereof another Rights Certificate or Rights Certificates for the number of whole Rights not exercised.

Subject to the provisions of the Rights Agreement, the Rights evidenced by this Rights Certificate may be redeemed by the Company at its option at a redemption price of $0.01 per Right at any time prior to the earlier of (i) the time immediately prior to such time as any person first becomes an Acquiring Person, and (ii) the Final Expiration Date (as such term is defined in the Rights Agreement). In addition, under certain circumstances following the time any person becomes an Acquiring Person, the Rights may be exchanged, in whole or in part, for Common Shares, Preferred Shares, or shares of other preferred stock of the Company having essentially the same value or economic rights as such shares. Immediately upon the action of the Board of Directors of the Company authorizing any such exchange, and without any further action or any notice, the Rights (other than Rights that are not subject to such exchange) will terminate and the Rights will only enable holders to receive the shares issuable upon such exchange.

No fractional Preferred Shares will be issued upon the exercise of any Right or Rights evidenced hereby (other than fractions that are integral multiples of one one-hundredth of a Preferred Share, which may, at the election of the Company, be evidenced by depositary receipts), but in lieu thereof a cash payment may be made, as provided in the Rights Agreement.

No holder of this Rights Certificate shall be entitled to vote or receive dividends or be deemed for any purpose the holder of Preferred Shares or of any other securities of the Company that may at any time be issuable on the exercise hereof, nor shall anything contained in the

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Rights Agreement or herein be construed to confer upon the holder hereof, as such, any of the rights of a stockholder of the Company or any right to vote for the election of directors or upon any matter submitted to stockholders at any meeting thereof, or to give consent to or withhold consent from any corporate action, or, to receive notice of meetings or other actions affecting stockholders (except as provided in the Rights Agreement), or to receive dividends or subscription rights, or otherwise, until the Right or Rights evidenced by this Rights Certificate shall have been exercised as provided in the Rights Agreement.

This Rights Certificate shall not be valid or obligatory for any purpose until it shall have been countersigned by an authorized signatory of the Rights Agent.

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WITNESS the facsimile signature of the proper officers of the Company and its corporate seal.

Dated as of , 20 .

Attest:				iBASIS, INC.


By:				By:
Name:				Name:
Title:				Title:

Countersigned:

COMPUTERSHARE TRUST COMPANY, N.A.


By:
Authorized Signature

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[Form of Reverse Side of Rights Certificate]

FORM OF ASSIGNMENT

(To be executed by the registered holder if such
holder desires to transfer the Rights Certificate.)

FOR VALUE RECEIVED		hereby sells, assigns and transfers unto


(Please print name and address of transferee)

(Please spell out and include in numerals the

number of Rights being transferred by this Assignment)

of the Rights evidenced by this Rights Certificate, together with all right, title and interest therein, and does hereby irrevocably constitute and appoint Attorney, to transfer the number of Rights indicated above on the books of the within named Company, with full power of substitution.

Dated: ,


	Signature

Medallion Signature Guaranteed:

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Certificate

The undersigned hereby certifies by checking the appropriate boxes that:

(1) the Rights evidenced by this Rights Certificate [ ] are [ ] are not being sold, assigned, and transferred by or on behalf of a Person who is or was an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined pursuant to the Rights Agreement); and

(2) after due inquiry and to the best knowledge of the undersigned, he, she, or it [ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate from any Person who is, was, or subsequently became an Acquiring Person or an Affiliate or Associate of an Acquiring Person.

Dated: ,
	Signature

Medallion Signature Guaranteed:

NOTICE

The signature to the foregoing Assignment and Certificate must correspond to the name as written upon the face of this Rights Certificate in every particular, without alteration or enlargement or any change whatsoever.

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[Form of Reverse Side of Rights Certificate — continued]

FORM OF ELECTION TO PURCHASE

(To be executed by the registered holder if such holder desires to

exercise any or all Rights evidenced by the Rights Certificate.)

To: iBasis, Inc.:

The undersigned hereby irrevocably elects to exercise ( ) Rights evidenced by this Rights Certificate to purchase the Preferred Shares issuable upon the exercise of the Rights (or such other securities of the Company or of any other person that may be issuable upon the exercise of the Rights) and requests that certificates for such shares be issued in the name of and delivered to or that such shares be credited to the book-entry account of:

(Please print social security or other identifying number)

(Please print name and address)

If such number of Rights shall not be all the Rights evidenced by this Rights Certificate, a new Rights Certificate for the balance of such Rights shall be registered in the name of and delivered to:

(Please print social security or other identifying number)

(Please print name and address)

Dated: ,


	Signature

Medallion Signature Guaranteed:

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Certificate

The undersigned hereby certifies by checking the appropriate boxes that:

(1) the Rights evidenced by this Rights Certificate [ ] are [ ] are not being exercised by or on behalf of a Person who is or was an Acquiring Person or an Affiliate or Associate of any such Acquiring Person (as such terms are defined pursuant to the Rights Agreement); and

(2) after due inquiry and to the best knowledge of the undersigned, he, she, or it [ ] did [ ] did not acquire the Rights evidenced by this Rights Certificate from any Person who is, was or became an Acquiring Person or an Affiliate or Associate of an Acquiring Person.

Dated: ,
	Signature

Medallion Signature Guaranteed:

NOTICE

The signature to the foregoing Election to Purchase and Certificate must correspond to the name as written upon the face of this Rights Certificate in every particular, without alteration or enlargement or any change whatsoever.

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Exhibit C

UNDER CERTAIN CIRCUMSTANCES SET FORTH IN THE RIGHTS AGREEMENT, RIGHTS ISSUED TO, OR BENEFICIALLY OWNED BY ANY PERSON WHO IS, WAS, OR BECOMES AN ACQUIRING PERSON OR ANY AFFILIATE OR ASSOCIATE THEREOF (AS SUCH TERMS ARE DEFINED IN THE RIGHTS AGREEMENT), WHETHER CURRENTLY BENEFICIALLY OWNED BY OR ON BEHALF OF SUCH PERSON OR BY ANY SUBSEQUENT BENEFICIAL OWNER WILL BECOME NULL AND VOID.

SUMMARY OF RIGHTS
TO PURCHASE PREFERRED STOCK

On July 30, 2009, the Board of Directors of iBasis, Inc., a Delaware corporation (the “Company”), declared a dividend distribution of one right (each, a “Right”) for each outstanding share of common stock, par value $0.001, of the Company (the “Common Shares”). The dividend is payable on August 10, 2009 to holders of record as of the close of business on August 10, 2009 (the “Record Date”).

The following is a summary description of the Rights. This summary is intended to provide a general description only and is subject to the detailed terms and conditions of the Rights Agreement (the “Rights Agreement”), dated as of July 30, 2009, by and between the Company and Computershare Trust Company, N.A., as rights agent (the “Rights Agent”).

1. Issuance of Rights

Each holder of Common Shares as of the Record Date will receive a dividend of one Right per Common Share. One Right will also be issued together with each Common Share issued by the Company after the Record Date and prior to the Distribution Date (as defined in Section 2 below), and in certain circumstances, after the Distribution Date. New certificates (or, if uncertificated, ownership statements in lieu thereof) for Common Shares issued after the Record Date will contain a notation incorporating the Rights Agreement by reference.

Until the Distribution Date:

· the Rights will not be exercisable;

· the Rights will be evidenced by the certificates for Common Shares (or by the ownership statements issued with respect to uncertificated Common Shares) and not by separate rights certificates; and

· the Rights will be transferable by, and only in connection with, the transfer of Common Shares.

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2. Distribution Date; Beneficial Ownership

The Rights are not exercisable until the Distribution Date. As of and after the Distribution Date, the Rights will separate from the Common Shares and each Right will become exercisable to purchase one one-hundredth of a share of Series A Junior Participating Preferred Stock, par value $0.001 per share, of the Company (each whole share, a “Preferred Share”) at a purchase price of $10.00 (such purchase price, as may adjusted, the “Purchase Price”). This portion of a Preferred Share would give the holder thereof approximately the same dividend, voting, and liquidation rights as would one Common Share.

The “Distribution Date” is the earliest of:

· 10 days following a public announcement that a person has become an “Acquiring Person” by acquiring beneficial ownership of 15% or more of the outstanding Common Shares then outstanding (or, in the case of a person that had beneficial ownership of 15% or more of the outstanding Common Shares on the date the Rights Agreement was executed, by obtaining beneficial ownership of any additional Common Shares) other than as a result of repurchases of Common Shares by the Company;

· 10 business days (or such later date as the Board of Directors of the Company shall determine prior to the time a person becomes an Acquiring Person) after the commencement by or on behalf of any person (other than the Company or certain related entities) of a tender or exchange offer, if (a) such tender offer or exchange offer has not commenced as of the date of the Rights Agreement, and (b) upon consummation thereof, such person would become an Acquiring Person; and

· immediately prior to the acceptance for payment of the Common Shares tendered pursuant to any tender offer or exchange offer commenced by or on behalf of any person (other than the Company or certain related entities) prior to, and pending as of, the date of the Rights Agreement, if upon consummation thereof such person would become an Acquiring Person.

A person will be deemed to “beneficially own” any Common Shares if such person or any affiliated or associated person of such person:

· is considered a “beneficial owner” of the Common Shares under Rule 13d-3 of the General Rules and Regulations under the Securities Exchange Act of 1934, as amended and as in effect on the date of the Rights Agreement;

· has the right to acquire the Common Shares, either immediately or in the future, pursuant to any agreement, arrangement, or understanding (other than a customary underwriting agreement relating to a bona fide public offering of the Common Shares) or upon the exercise of conversion rights, exchange rights, rights, warrants or options, or otherwise, except that a person will not be deemed to be a beneficial owner of (a) Common Shares tendered pursuant to a tender or exchange offer by or on behalf of such person or any affiliated or associated

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persons of such person until the tendered Common Shares are accepted for purchase or exchange, (b) securities issuable upon exercise of a Right before the occurrence of a Triggering Event (as defined in Section 5 below), or (c) securities issuable upon exercise of a Right after the occurrence of a Triggering Event if the Rights are originally issued Rights or were issued in connection with an adjustment to originally issued Rights;

· has the right to vote or dispose of the Common Shares pursuant to any agreement, arrangement, or understanding (other than a right to vote arising from the granting of a revocable proxy or consent that is not also then reportable on a Schedule 13D); or

· has an agreement, arrangement, or understanding with another person who beneficially owns Common Shares and the agreement, arrangement, or understanding is for the purpose of acquiring, holding, voting, or disposing of any securities of the Company (other than customary underwriting agreements relating to a bona fide public offering of Common Shares or a right to vote arising from the granting of a revocable proxy or consent that is not also then reportable on a Schedule 13D).

3. Issuance of Rights Certificates

As soon as practicable after the Distribution Date, the Rights Agent will mail rights certificates to holders of record of the Common Shares as of the close of business on the Distribution Date and, thereafter, the separate rights certificates alone will evidence the Rights.

4. Expiration of Rights

The Rights will expire on the earliest of (a) 5:00 P.M., New York City time, on July 30, 2010, (b) the time at which the Rights are redeemed (as described in Section 6 below), and (c) the time at which the Rights are exchanged in full (as described in Section 7 below).

5. Change of Exercise of Rights Following Certain Events

The following described events are referred to as “Triggering Events”:

(a) Flip-In Event. In the event that a person becomes an Acquiring Person, each holder of a Right will thereafter have the right to receive, upon exercise, Common Shares (or, in certain circumstances, other securities, cash, or other assets of the Company) having a value equal to two times the Purchase Price. Notwithstanding any of the foregoing, following the occurrence of a person becoming an Acquiring Person, all Rights that are, or (under certain circumstances specified in the Rights Agreement) were, beneficially owned by any Acquiring Person (or by certain related parties) will be null and void.

(b) Flip-Over Events. In the event that, at any time after a person has become an Acquiring Person, (i) the Company engages in a merger or other business combination transaction in which the Company is not the continuing or surviving corporation or other entity, (ii) the Company engages in a merger or other business combination transaction in which the

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Company is the continuing or surviving corporation and the Common Shares of the Company are changed or exchanged, or (iii) 50% or more of the Company’s assets or earning power is sold or transferred, each holder of a Right (except Rights that have previously been voided as set forth above) shall thereafter have the right to receive, upon exercise, common shares of the acquiring company having a value equal to two times the Purchase Price.

6. Redemption

At any time prior to such time as any person becomes an Acquiring Person, the Board of Directors of the Company may direct the Company to redeem the Rights in whole, but not in part, at a price of $0.01 per Right (payable in cash, Common Shares, or other consideration deemed appropriate by the Board of Directors of the Company). Immediately upon the action of the Board of Directors of the Company directing the Company to redeem the Rights, the Rights will terminate and the only right of the holders of Rights will be to receive the $0.01 redemption price.

7. Exchange of Rights

At any time after a person becomes an Acquiring Person, the Board of Directors of the Company may direct the Company to exchange the Rights (other than Rights owned by such person or certain related parties, which will have become void), in whole or in part, at an exchange ratio of one Common Share per Right (subject to adjustment). The Company may substitute Preferred Shares (or shares of a class or series of the Company’s preferred stock having equivalent rights, preferences, and privileges) for Common Shares at an initial rate of one one-hundredth of a Preferred Share (or of a share of a class or series of the Company’s preferred stock having equivalent rights, preferences, and privileges) per Common Share. Immediately upon the action of the Board of Directors of the Company directing the Company to exchange the Rights, the Rights will terminate and the only right of the holders of Rights will be to receive the number of Common Shares (or one one-hundredth of a Preferred Share or of a share of a class or series of the Company’s preferred stock having equivalent rights, preferences, and privileges) equal to the number of Rights held by such holder multiplied by the exchange ratio.

8. Adjustments to Prevent Dilution; Fractional Shares

The Board of Directors of the Company may adjust the Purchase Price, the number of Preferred Shares or other securities or assets issuable upon exercise of a Right, and the number of Rights outstanding to prevent dilution that may occur (a) in the event of a stock dividend on, or a subdivision, combination, or reclassification of, the Preferred Shares, (b) in the event of a stock dividend on, or a subdivision or combination of, the Common Shares, (c) if holders of the Preferred Shares are granted certain rights, options, or warrants to subscribe for Preferred Shares or convertible securities at less than the current market price of the Preferred Shares, or (d) upon the distribution to holders of the Preferred Shares of evidences of indebtedness or assets (excluding regular periodic cash dividends) or of subscription rights or warrants (other than those referred to above).

With certain exceptions, no adjustment in the Purchase Price will be required until cumulative adjustments amount to at least 1% of the Purchase Price. No fractional Preferred

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Shares will be issued (other than fractions that are integral multiples of one one-hundredth of a Preferred Share), and in lieu thereof, an adjustment in cash may be made based on the market price of the Preferred Shares on the last trading date prior to the date of exercise.

9. No Stockholder Rights Prior to Exercise; Tax Considerations

Until a Right is exercised, the holder thereof, as such, will have no rights as a stockholder of the Company, including, without limitation, the right to vote or to receive dividends. While the distribution of the Rights will not be taxable to stockholders or to the Company, stockholders may, depending upon the circumstances, recognize taxable income in the event that the Rights become exercisable for Common Shares (or other consideration) of the Company or for common shares of the acquiring company or in the event of the redemption of the Rights as set forth in Section 6 above.

10. Amendment of Rights Agreement

As long as the Rights are then redeemable, the Company may supplement or amend any provisions of the Rights Agreement in any respect without the approval of any holders of the Rights. At any time when the Rights are no longer redeemable the Company may supplement or amend the Rights Agreement without the approval of any holders of Rights in order to (a) cure any ambiguity, (b) correct or supplement any provisions contained therein which may be defective or inconsistent with any other provisions therein, (c) shorten or lengthen any time period thereunder, or (d) change or supplement the provisions thereunder in any manner which the Company may deem necessary or desirable; provided, however, that no such supplement or amendment shall adversely affect the interests of the holders of Rights as such (other than an Acquiring Person or an Affiliate or Associate of an Acquiring Person and certain of their transferees), and no such amendment may cause the Rights again to become redeemable or cause the Rights Agreement again to become amendable other than in accordance with this sentence.

A copy of the Rights Agreement has been filed by the Company with the Securities and Exchange Commission as an exhibit to a Form 8-K filed on July 30, 2009. In addition, a copy of the Rights Agreement is available free of charge from the Company. This summary description of the Rights does not purport to be complete and is qualified in its entirety by reference to the Rights Agreement.

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RIGHTS AGREEMENT between iBASIS, INC. and COMPUTERSHARE TRUST COMPANY, N.A., as Rights Agent Dated as of July 30, 2009

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