SECURITIES PURCHASE AGREEMENT BY AND AMONG WHITEHAWK THERAPEUTICS, INC., AND THE PURCHASERS May 12, 2026

Exhibit 10.1

BY AND AMONG

AND

THE PURCHASERS

May 12, 2026

TABLE OF CONTENTS


1.	Definitions		1

2.	Purchase and Sale of Common Stock		6
	2.1	Purchase and Sale	6
	2.2	Closing	6

3.	Representations and Warranties of the Company		7
	3.1	Organization and Power	7
	3.2	Capitalization	7
	3.3	Registration Rights	7
	3.4	Authorization	7
	3.5	Valid Issuance	8
	3.6	No Conflict	8
	3.7	Consents	9
	3.8	SEC Filings; Financial Statements	9
	3.9	Absence of Changes	9
	3.10	Absence of Litigation	10
	3.11	Compliance with Law; Permits	10
	3.12	Intellectual Property	10
	3.13	Employee Benefits	11
	3.14	Taxes	12
	3.15	Environmental Laws	12
	3.16	Title	13
	3.17	Insurance	13
	3.18	Nasdaq Stock Market	13
	3.19	▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act	13
	3.20	Regulatory	13
	3.21	Accounting Controls and Disclosure Controls and Procedures	15
	3.22	Price Stabilization of Common Stock	15
	3.23	Investment Company Act	15
	3.24	General Solicitation; No Integration or Aggregation	15
	3.25	Brokers and Finders	16
	3.26	Reliance by the Purchasers	16
	3.27	No Disqualification Events	16
	3.28	No Additional Agreements	16
	3.29	Anti-Bribery and Anti-Money Laundering Laws	16
	3.30	Company IT Systems; Cybersecurity	16
	3.31	No Additional Agreements	17
	3.32	Transactions with Affiliates and Employees	17
	3.33	No Other Representations or Warranties	17

4.	Representations and Warranties of Each Purchaser		17
	4.1	Organization	17
	4.2	Authorization	18
	4.3	No Conflict	18


	4.4	Consents	18
	4.5	Residency	18
	4.6	Brokers and Finders	18
	4.7	Investment Representations and Warranties	19
	4.8	Intent	19
	4.9	Investment Experience; Ability to Protect Its Own Interests and Bear Economic Risks	19
	4.10	Tax Advisors	20
	4.11	Securities Not Registered; Legends	20
	4.12	Placement Agent	21
	4.13	Reliance by the Company	21
	4.14	No General Solicitation	21
	4.15	No Reliance	22
	4.16	Access to Information	22
	4.17	Certain Trading Activities	22
	4.18	Disqualification Event	23
	4.19	Defense Production Act Compliance	23
	4.20	Acknowledgments Regarding Placement Agents	23

5.	Covenants		24
	5.1	Further Assurances	24
	5.2	Listing	24
	5.3	Disclosure of Transactions	24
	5.4	Integration	24
	5.5	Pledge of Securities	25
	5.6	Subsequent Equity Sales	25
	5.7	Reservation of Common Stock; Reservation of Warrant Shares	25
	5.8	Use of Proceeds	26
	5.9	Removal of Legends	26
	5.10	Indemnification	26
	5.11	Lock-Up Agreements	27

6.	Conditions of Closing		28
	6.1	Conditions to the Obligation of the Purchasers	28
	6.2	Conditions to the Obligation of the Company	29

7.	Termination		30
	7.1	Conditions of Termination	30

8.	Miscellaneous Provisions		30
	8.1	Public Statements or Releases	30
	8.2	Interpretation	31
	8.3	Notices	31
	8.4	Severability	32
	8.5	Governing Law; Submission to Jurisdiction; Venue; Waiver of Trial by Jury	32
	8.6	Waiver	33
	8.7	Expenses	33


8.8	Assignment	33
8.9	Confidential Information	33
8.10	Third Parties	34
8.11	Independent Nature of Purchasers’ Obligations and Right	34
8.12	Counterparts	35
8.13	Entire Agreement; Amendments	35
8.14	Survival	35
8.15	Mutual Drafting	35
8.16	Additional Matters	35
8.17	Reliance by and Exculpation of the Placement Agents	35

Exhibits


Exhibit A Purchasers			A-1

Exhibit B Form of Pre-Funded Warrant			B-1

Exhibit C Form of Registration Rights Agreement			C-1

Exhibit ▇ ▇▇▇▇▇▇▇▇▇ Required Disclosure			D-1

Exhibit E Form of Lock-Up Agreement			E-1

iii

This SECURITIES PURCHASE AGREEMENT (this “Agreement”) is dated as of May 12, 2026, by and among Whitehawk Therapeutics, Inc., a Delaware corporation (the “Company”), and the individuals and entities listed on Exhibit A attached to this Agreement (each, a “Purchaser” and together, the “Purchasers”).

WHEREAS, the Company and the Purchasers are executing and delivering this Agreement in reliance upon the exemption from securities registration afforded by Section 4(a)(2) of the Securities Act of 1933, as amended (the “Securities Act”);

WHEREAS, the Company desires to issue and sell to the Purchasers, and each Purchaser desires to purchase from the Company, severally and not jointly, upon the terms and subject to the conditions stated in this Agreement, shares of the Company’s common stock, par value $0.0001 per share (the “Common Stock”), and/or pre-funded warrants to purchase Common Stock in the form attached hereto as Exhibit B (the “Pre-Funded Warrants”); and

WHEREAS, contemporaneously with the sale of the Shares (as defined below) and the Pre-Funded Warrants, the parties hereto will execute and deliver a Registration Rights Agreement, substantially in the form attached hereto as Exhibit C, pursuant to which the Company will agree to provide certain registration rights in respect of the Shares and the Warrant Shares (as defined below) under the Securities Act and applicable state securities laws.

NOW THEREFORE, in consideration of the mutual agreements, representations, warranties and covenants herein contained, the Company and each Purchaser, severally and not jointly, agree as follows:

1. Definitions. As used in this Agreement, the following terms shall have the following respective meanings:

“2026 SEC Reports” shall mean (a) the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2025 and (b) any Quarterly Reports on Form 10-Q or any Current Reports on Form 8-K filed or furnished (as applicable) by the Company after December 31, 2025, together in each case with any documents incorporated by reference therein or exhibits thereto.

“Affiliate” shall mean, with respect to any Person, any other Person that, directly or indirectly through one or more intermediates, controls, is controlled by or is under common control with such Person.

“Agreement” has the meaning set forth in the recitals hereof.

“Amended and Restated Bylaws” shall mean the Bylaws of the Company, as currently in effect.

“Amended and Restated Certificate of Incorporation” shall mean the Certificate of Incorporation of the Company, as currently in effect.

“Benefit Plan” or “Benefit Plans” shall mean employee benefit plans as defined in Section 3(3) of ERISA and all other employee benefit practices or arrangements, including, without limitation, any such practices or arrangements providing severance pay, sick leave, vacation pay, salary continuation for disability, retirement benefits, deferred compensation, bonus pay, incentive pay, stock options or other stock-based compensation, hospitalization insurance, medical insurance, life insurance, scholarships or tuition reimbursements, maintained by the Company or to which the Company is obligated to contribute for employees or former employees.

“Board of Directors” means the board of directors of the Company.

“Closing” has the meaning set forth in Section 2.2 hereof.

“Closing Date” shall mean May 14, 2026 or such other date as mutually agreed by the Company and the Purchasers, but in no event later than the fifth (5th) business day following the date hereof.

“Code” shall mean the Internal Revenue Code of 1986, as amended.

“Common Stock” has the meaning set forth in the recitals hereof.

“Common Stock Equivalents” means any securities of the Company which would entitle the holder thereof to acquire at any time Common Stock, including, without limitation, any debt, preferred stock, rights, options, warrants or other instrument that is at any time convertible into or exchangeable for, or otherwise entitles the holder thereof to receive, Common Stock.

“Company” has the meaning set forth in the recitals hereof.

“Company IT Systems” has the meaning set forth in Section 3.30 hereof.

“Company Products” has the meaning set forth in Section 3.20(c) hereof.

“Company Regulatory Permits” has the meaning set forth in Section 3.20(c) hereof. “Control” (including the terms “controlling” “controlled by” and “under common control with”) with respect to any Person shall mean the possession, directly or indirectly, of the power to direct or cause the direction of the management policies of such Person, whether through the ownership of voting securities, by contract or otherwise.

“Covered Person” has the meaning set forth in Section 3.27 hereof.

“Disclosure Document” has the meaning set forth in Section 5.3 hereof.

“Disqualification Event” has the meaning set forth in Section 3.27 hereof.

“Drug Regulatory Agency” shall mean the FDA or other comparable governmental authority responsible for regulation of the research, development, testing, manufacturing, processing, storage, labeling, sale, marketing, advertising, distribution and importation or exportation of drug products and drug product candidates.

“Environmental Laws” has the meaning set forth in Section 3.15 hereof.

“ERISA” shall mean the Employee Retirement Income Security Act of 1974, as amended.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended, and all of the rules and regulations promulgated thereunder.

“Financial Statements” has the meaning set forth in Section 3.8(b) hereof.

“GAAP” has the meaning set forth in Section 3.8(b) hereof.

“Governmental Authorizations” has the meaning set forth in Section 3.11 hereof.

“Health Care Laws” means (a) the Federal Food, Drug, and Cosmetic Act (21 U.S.C. § 301 et seq.) (“FDCA”) and Public Health Service Act (42 U.S.C. § 201 et seq.) and any other similar applicable law administered by the U.S. Food and Drug Administration (“FDA”) or other comparable governmental authority responsible for regulation of the development, clinical testing, manufacturing, sale, marketing, distribution and importation or exportation of drug and biopharmaceutical products of similar nature to those developed by the Company and their implementing regulations; (b) Good Clinical Practice, regulations for studies that are submitted to regulatory authorities to support product approval; and (c) laws regulating the use or disclosure of personal data collected in the conduct of clinical trials, including Protected Health Information as defined under the Health Insurance Portability and Accountability Act of 1996 as amended at 45 CFR 164.103.

“Intellectual Property” has the meaning set forth in Section 3.12(a) hereof.

“Material Adverse Effect” shall mean any change, event, circumstance, development, condition, occurrence or effect that, individually or in the aggregate, (a) was, is, or would reasonably be expected to be, materially adverse to the business, financial condition, prospects, assets, liabilities, stockholders’ equity or results of operations of the Company, or (b) materially delays or materially impairs the ability of the Company to comply, or prevents the Company from complying, with its obligations under this Agreement or with respect to the Closing or would reasonably be expected to do so; provided, however, that none of the following will be deemed in themselves, either alone or in combination, to constitute, and that none of the following will be taken into account in determining whether there has been or will be, a Material Adverse Effect under subclause (a) of this definition:

(i) any change generally affecting the economy, financial markets or political, economic or regulatory conditions in the United States or any other geographic region in which the Company conducts business, provided that the Company is not disproportionately affected thereby;

(ii) general financial, credit or capital market conditions, including interest rates or exchange rates, or any changes therein, provided that the Company is not disproportionately affected thereby;

(iii) any change that generally affects industries in which the Company conducts business, provided that the Company is not disproportionately affected thereby;

(iv) changes in laws after the date hereof, provided that the Company is not disproportionately affected thereby;

(v) changes or proposed changes in GAAP after the date of this Agreement, provided that the Company is not disproportionately affected thereby; and

(vi) in and of itself, any failure by the Company to meet any published or internally prepared estimates of revenues, expenses, earnings or other economic performance for any period ending on or after the date of this Agreement (it being understood that the facts and circumstances giving rise to such failure may be deemed to constitute, and may be taken into account in determining whether there has been, a Material Adverse Effect to the extent that such facts and circumstances are not otherwise described in clauses (i)-(v) of the definition).

“National Exchange” means any of the following markets or exchanges on which the Common Stock is listed or quoted for trading on the date in question, together with any successor thereto: the NYSE American, The New York Stock Exchange, the Nasdaq Global Market, the Nasdaq Global Select Market and the Nasdaq Capital Market.

“Patents” has the meaning set forth in Section 3.12(a) hereof.

“Person” shall mean an individual, partnership, corporation, limited liability company, business trust, joint stock company, trust, unincorporated association, joint venture or any other entity or organization.

“Placement Agents” shall mean ▇▇▇▇▇▇▇▇▇ LLC, Leerink Partners LLC, ▇▇▇▇▇▇▇▇▇▇▇ & Co. Inc., Citizens JMP Securities, LLC, and ▇▇▇▇▇ Trading Institutional Services LLC, whom the Company has engaged as its exclusive placement agents in connection with the placement of the Securities.

“Pre-Funded Warrants” has the meaning set forth in the recitals hereof.

“Purchaser” and “Purchasers” have the meanings set forth in the recitals hereof.

“Purchaser Adverse Effect” has the meaning set forth in Section 4.3 hereof.

“Registration Rights Agreement” has the meaning set forth in Section 6.1(j) hereof.

“Rule 144” means Rule 144 promulgated by the United States Securities and Exchange Commission (the “SEC”) pursuant to the Securities Act, as such Rule may be amended from time to time, or any similar rule or regulation hereafter adopted by the SEC having substantially the same effect as such Rule.

“SEC” has the meaning set forth in the recitals hereof.

“SEC Reports” has the meaning set forth in Section 3.8(a) hereof.

“Securities” means the Shares, the Pre-Funded Warrants and the Warrant Shares.

“Securities Act” has the meaning set forth in the recitals hereof.

“Shares” means the shares of Common Stock issued or issuable to each Purchaser pursuant to this Agreement, but excluding the Warrant Shares.

“Short Sales” include, without limitation, (i) all “short sales” as defined in Rule 200 promulgated under Regulation SHO under the Exchange Act, whether or not against the box, and all types of direct and indirect stock pledges, forward sale contracts, options, puts, calls, short sales, swaps, “put equivalent positions” (as defined in Rule 16a-1(h) under the Exchange Act) and similar arrangements (including on a total return basis), and (ii) sales and other transactions through non-U.S. broker dealers or non-U.S. regulated brokers (but shall not be deemed to include the location and/or reservation of borrowable shares of Common Stock).

“Subscription Amount” means the aggregate amount to be paid for the Shares and Pre-Funded Warrants purchased hereunder as indicated under the heading “Subscription Amount” on Exhibit A.

“Tax Returns” shall mean returns, reports, information statements and other documentation (including any additional or supporting material) filed or maintained, or required to be filed or maintained, in connection with the calculation, determination, assessment or collection of any Tax and shall include any amended returns required as a result of examination adjustments made by the Internal Revenue Service or other Tax authority.

“Tax” or “Taxes” shall mean (a) any and all federal, state, local, non-U.S. and other taxes, levies, fees, imposts, duties and charges of whatever kind (including any interest, penalties or additions to the tax imposed in connection therewith or with respect thereto), whether or not imposed on the Company, including, without limitation, taxes imposed on, or measured by, income, franchise, profits or gross receipts, and also ad valorem, value added, sales, use, service, real or personal property, capital stock, license, payroll, withholding, employment, social security, workers’ compensation, unemployment compensation, utility, severance, production, excise, stamp, occupation, premium, windfall profits, transfer and gains taxes and customs duties, and (b) any liability for any amounts of the type described in clause (a) of another Person as a transferee or successor, by contract (including any Tax Sharing Agreement), under Treasury Regulations Section 1.1502-6 or analogous state, local or non-U.S. law, as a result of being a party or as a result of any express or implied obligation to indemnify any other Person, or otherwise, in each case, whether disputed or not.

“Tax Sharing Agreement” means any Tax allocation agreement, Tax indemnification agreement, Tax sharing agreement or similar contract or arrangement, whether or not written.

“Transaction Agreements” shall mean this Agreement, the Registration Rights Agreement and the Pre-Funded Warrants.

“Transfer Agent” shall mean, with respect to the Common Stock, Broadridge Corporate Issuer Solutions, LLC, or such other financial institution that provides transfer agent services as proposed by the Company and consented to by the Purchasers, which consent shall not be unreasonably withheld.

“Warrant Shares” means the shares of Common Stock issuable upon exercise of the Pre-Funded Warrants.

“Willful Breach” has the meaning set forth in Section 7.1 hereof.

2. Purchase and Sale of Common Stock.

2.1 Purchase and Sale. On the Closing Date, upon the terms and subject to the conditions set forth herein, the Company agrees to sell, and the Purchasers, severally and not jointly, agree to purchase, up to an aggregate of $87.5 million of Shares and/or Pre-Funded Warrants. The purchase price per share of Common Stock shall be $3.92 per share, or such higher amount as set forth on Exhibit A.Each Purchaser who so elects to purchase Pre-Funded Warrants in lieu of Shares shall deliver to the Company at least one business day prior to the Closing Date a calculation of the number of Pre-Funded Warrants to be delivered in lieu of Shares, and Exhibit A shall be amended accordingly and distributed to all Purchasers at least one business day prior to the Closing Date. Subject to and upon the terms and conditions set forth in this Agreement, at the Closing, the Company shall issue and sell to each Purchaser, and each Purchaser, severally and not jointly, shall purchase from the Company, (a) that number of Shares equal to the dollar amount set forth opposite such Purchaser’s name on Exhibit A under the heading “Aggregate Purchase Price” and/or (b) a Pre-Funded Warrant to purchase the number of Warrant Shares set forth opposite such purchasers name as indicated on Exhibit A under the heading “Warrant Shares”, if any, at a purchase price equal to $3.9199 and an exercise price equal to $0.0001 per Warrant Share.

2.2 Closing. Subject to the satisfaction or waiver of the conditions set forth in Section 6 of this Agreement, the closing of the purchase and sale of the Securities (the “Closing”) shall occur remotely via the exchange of documents and signatures on the Closing Date. At the Closing, the Securities shall be issued and registered in the name of such Purchaser, or in such nominee name(s) as designated by such Purchaser, representing the number of Shares to be purchased by such Purchaser at the Closing as set forth in Exhibit A, and, if applicable, a Pre-Funded Warrant, in each case against payment to the Company of the purchase price therefor in full by wire transfer to the Company of immediately available funds, at or prior to the Closing, in accordance with wire instructions provided by the Company to the Purchasers at least one business day prior to the Closing, to an account to be designated by the Company (which shall not be an escrow account). On the Closing Date, the Company will issue the Shares in book-entry form, free and clear of all restrictive and other legends (except as expressly provided in Section 4.11 hereof) and shall provide evidence of such issuance from the Transfer Agent as of the Closing Date to each Purchaser. For each Purchaser of Pre-Funded Warrants pursuant to Section 2.1 the Company shall deliver a Pre-Funded Warrant registered in the name of such Purchaser to purchase up to a number of shares of Common Stock equal to the portion of the Purchaser’s Subscription Amount applicable to Pre-Funded Warrants divided by $3.92, with an exercise price equal to $0.0001 per Warrant Share, subject to adjustment as provided therein. The failure of the Closing to occur on the Closing Date shall not terminate this Agreement or otherwise relieve any party of any of its obligations hereunder, unless the Agreement has otherwise been terminated in accordance with its terms.

3. Representations and Warranties of the Company. The Company hereby represents and warrants to each of the Purchasers and the Placement Agents that the statements contained in this Section 3 are true and correct as of the date hereof and the Closing Date (except for the representations and warranties that speak as of a specific date, which shall be made as of such date):

3.1 Organization and Power. The Company is a corporation duly organized, validly existing and in good standing under the laws of the State of Delaware, has the requisite power and authority to own, lease and operate its properties and to carry on its business as now conducted and is qualified to do business in each jurisdiction in which the character of its properties or the nature of its business requires such qualification, except where such failure to be in good standing or to have such power and authority or to so qualify would not reasonably be expected to have a Material Adverse Effect. As of the date hereof, the Company has no subsidiaries.

3.2 Capitalization. The authorized capital stock of the Company consists of 300,000,000 shares of Common Stock and 10,000,000 shares of preferred stock, par value $0.0001 per share. The Company’s disclosure of its issued and outstanding capital stock in the 2026 SEC Reports containing such disclosure was accurate in all material respects as of the date indicated in such 2026 SEC Reports (except for subsequent issuances, if any, pursuant to this Agreement or pursuant to reservations, agreements or employee benefit plans, in each case, referred to in the SEC Reports or pursuant to the exercise of convertible securities or options or the vesting of restricted stock units referred to in the SEC Reports). All of the issued and outstanding shares of Common Stock have been duly authorized and validly issued and are fully paid and non-assessable, and outstanding warrants have been issued in material compliance with all applicable securities laws. None of the outstanding shares of capital stock of the Company were issued in violation of any preemptive or other similar rights of any securityholder of the Company which have not been waived. Neither the execution of this Agreement nor the issuance of the Shares or Pre-Funded Warrants will result in the triggering of any anti-dilution or other similar rights (including a rights distribution under any “poison pill” plan or similar arrangement). Other than the Common Stock, there are no other shares of any other class or series of capital stock of the Company issued or outstanding.

3.3 Registration Rights. Except as set forth in the Transaction Agreements or as disclosed in the 2026 SEC Reports, the Company is presently not under any obligation, and has not granted any rights, to register under the Securities Act any of the Company’s presently outstanding securities or any of its securities that may hereafter be issued that have not expired or been satisfied.

3.4 Authorization. The Company has all requisite corporate power and authority to enter into the Transaction Agreements and to carry out and perform its obligations under the terms of the Transaction Agreements. All corporate action on the part of the Company, its officers, directors and stockholders necessary for the authorization of the Securities, the authorization, execution, delivery and performance of the Transaction Agreements and the consummation of the transactions contemplated herein has been taken. This Agreement has been duly executed and delivered by the Company and assuming the due authorization, execution and delivery by each Purchaser and that this Agreement constitutes the legal, valid and binding agreement of each Purchaser, this Agreement constitutes a legal, valid and binding obligation of the Company, enforceable against the Company in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium and similar

laws relating to or affecting creditors generally or by general equity principles (regardless of whether such enforceability is considered in a proceeding in equity or at law). Upon their respective execution by the Company and the other parties thereto and assuming that they constitute legal, valid and binding agreements of the other parties thereto, the Registration Rights Agreement will constitute a legal, valid and binding obligation of the Company, enforceable against the Company in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization, moratorium and similar laws relating to or affecting creditors generally or by general equity principles (regardless of whether such enforceability is considered in a proceeding in equity or at law).

3.5 Valid Issuance. The Shares and Pre-Funded Warrants being purchased by the Purchasers hereunder, upon issuance pursuant to the terms hereof, against full payment therefor in accordance with the terms of this Agreement, will be duly and validly issued, fully paid and non-assessable and will be issued free and clear of any liens or other restrictions (other than those under applicable state and federal securities laws). The Warrant Shares have been duly and validly authorized and reserved for issuance and, upon exercise of the Pre-Funded Warrants, in accordance with their terms, including the payment of any exercise price therefor, will be validly issued, fully paid and nonassessable. Subject to the accuracy of the representations and warranties made by the Purchasers in Section 4 hereof, the offer and sale of the Securities to the Purchasers is and will be in compliance with applicable exemptions from (i) the registration and prospectus delivery requirements of the Securities Act and (ii) the registration and qualification requirements of applicable securities laws of the states of the United States. The Company satisfies the registrant requirements for the use of a registration statement on Form S-3 to register the Shares and the Warrant Shares for resale by the Purchasers under the Securities Act.

3.6 No Conflict. The execution, delivery and performance of the Transaction Agreements by the Company, the issuance of the Shares and Pre-Funded Warrants, the reservation for issuance and issuance of the Warrant Shares and the consummation of the other transactions contemplated hereby will not (i) violate any provision of the Amended and Restated Certificate of Incorporation or Amended and Restated Bylaws of the Company, (ii) conflict with or result in a violation of or default (with or without notice or lapse of time, or both) under, or give rise to a right of termination, cancellation or acceleration of any obligation, a change of control right or to a loss of a benefit under any agreement or instrument, credit facility, franchise, license, judgment, order, statute, law, ordinance, rule or regulations, applicable to the Company or its properties or assets, or (iii) result in a violation of any law, rule, regulation, order, judgment, injunction, decree or other restriction of any court or governmental authority to which the Company is subject (including federal and state securities laws and regulations) and the rules and regulations of any self-regulatory organization to which the Company or its securities are subject, or by which any property or asset of the Company is bound or affected, except, in the case of clauses (ii) and (iii), as would not, individually or in the aggregate, be reasonably expected to have a Material Adverse Effect.

3.7 Consents. Assuming the accuracy of the representations and warranties of the Purchasers, no consent, approval, authorization, filing with or order of or registration with, any court or governmental agency or body is required in connection with the transactions contemplated herein, other than (a) filings that have been or will be obtained or made under the Securities Act or the Exchange Act, (b) the filing of any requisite notices and/or application(s) to the National Exchange for the issuance and sale of the Securities and the listing of the Shares and the Warrant Shares for trading or quotation, as the case may be, thereon in the time and manner required thereby, (c) filings required to consummate the transactions contemplated by the Transaction Agreements or (d) filings that may be required under the securities, or blue sky, laws of any state jurisdiction in connection with the offer and sale of the Securities by the Company in the manner contemplated herein or such that the failure of which to obtain would not have a Material Adverse Effect.

3.8 SEC Filings; Financial Statements.

(a) The Company has filed or furnished, as applicable, all forms, statements, certifications, reports and documents required to be filed or furnished by it with the SEC under the Exchange Act or the Securities Act for the year preceding the date hereof (the “SEC Reports”). As of the time it was filed with the SEC (or, if amended or superseded by a filing prior to the date of this Agreement, then on the date of such filing), each of the SEC Reports complied in all material respects with the applicable requirements of the Securities Act or the Exchange Act (as the case may be) and, as of the time they were filed, none of the SEC Reports contained any untrue statement of a material fact or omitted to state a material fact required to be stated therein or necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. As used in this Section 3.8, the term “file” and variations thereof shall be broadly construed to include any manner in which a document or information is furnished, supplied or otherwise made available to the SEC.

(b) The financial statements of the Company included in the SEC Reports (collectively, the “Financial Statements”) fairly present in all material respects the financial position of the Company as of the dates indicated, and the results of its operations and cash flows for the periods therein specified, all in accordance with United States generally accepted accounting principles (“GAAP”) (except as otherwise noted therein, and in the case of unaudited financial statements, as permitted by Form 10-Q of the SEC, and except that the unaudited financial statements may not contain footnotes and are subject to normal and recurring year-end adjustments) applied on a consistent basis unless otherwise noted therein throughout the periods therein specified. Except as set forth in the Financial Statements filed prior to the date hereof, the Company has not incurred any liabilities, contingent or otherwise, except those incurred in the ordinary course of business, consistent (as to amount and nature) with past practices since the date of such financial statements, none of which, individually or in the aggregate, have had or would reasonably be expected to have a Material Adverse Effect.

3.9 Absence of Changes. Except as otherwise stated or disclosed in the 2026 SEC Reports filed at least one business day prior to the date hereof, between December 31, 2025 and the date of this Agreement, (a) the Company has conducted its business only in the ordinary course of business (except for the execution and performance of this Agreement and the discussions, negotiations and transactions related thereto) and (b) there has not been any Material Adverse Effect.

3.10 Absence of Litigation. Except as disclosed in the 2026 SEC Reports, there is no action, suit, proceeding, arbitration, claim, investigation or inquiry pending or, to the Company’s knowledge, threatened in writing by or before any governmental body against the Company which, individually or in the aggregate, has had or would reasonably be expected to have a Material Adverse Effect, nor are there any orders, writs, injunctions, judgments or decrees outstanding of any court or government agency or instrumentality and binding upon the Company that have had or would reasonably be expected to have a Material Adverse Effect. Neither the Company, nor to the knowledge of the Company, any director or officer thereof, is, or within the last ten years has been, the subject of any action involving a claim of violation of or liability under federal or state securities laws relating to the Company or a claim of breach of fiduciary duty relating to the Company.

3.11 Compliance with Law; Permits. The Company is not in violation of, and has not received any notices of violations with respect to, any laws, statutes, ordinances, rules or regulations of any governmental body, court or government agency or instrumentality, except for violations which, individually or in the aggregate, have not had and would not reasonably be expected to have a Material Adverse Effect. The Company has all required licenses, permits, certificates and other authorizations (collectively, “Governmental Authorizations”) from such federal, state or local government or governmental agency, department or body that are currently necessary for the operation of the business of the Company as currently conducted, except where the failure to possess currently such Governmental Authorizations has not had and is not reasonably expected to have a Material Adverse Effect. The Company has not received any written notice regarding any revocation or material modification of any such Governmental Authorization, which, individually or in the aggregate, if the subject of an unfavorable decision, ruling or finding, has or would reasonably be expected to result in a Material Adverse Effect.

3.12 Intellectual Property.

(a) “Intellectual Property” means (a) United States, foreign and international patents, patent applications, including all provisionals, nonprovisionals, substitutions, divisionals, continuations, continuations-in-part, reissues, extensions, supplementary protection certificates, reexaminations, term extensions, certificates of invention and the equivalents of any of the foregoing, statutory invention registrations, invention disclosures and inventions (collectively, “Patents”), (b) trademarks, service marks, trade names, domain names, corporate names, brand names, URLs, trade dress, logos and other source identifiers, including registrations and applications for registration thereof, (c) copyrights, including registrations and applications for registration thereof, (d) software, including all source code, object code and related documentation, formulae, trade secrets, know-how, confidential information and other proprietary rights and intellectual property, whether patentable or not, and (e) all United States and foreign rights arising under or associated with any of the foregoing used, sold, licensed or otherwise exploited in the operation of its business as presently conducted or reasonably expected to be conducted.

(b) To its knowledge, the Company solely and exclusively owns or has obtained valid and enforceable licenses for, free and clear of all liens or encumbrances, all U.S. Intellectual Property necessary for its business as now conducted and currently proposed to be conducted in the future as described in the 2026 SEC Reports, and, to the knowledge of the Company, the conduct of its current and proposed business does not infringe or misappropriate, in any material respect, any U.S. Intellectual Property of any third party. The Company has not received any communications (in each case that has not been resolved) of any alleged infringement, misappropriation or breach of any Intellectual Property rights of others.

(c) To the Company’s knowledge, there are no orders, settlement agreements or stipulations to which the Company is a party or by which the Company is bound that restricts the Company’s rights to use any Intellectual Property in the operation of the business as currently conducted.

(d) Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, there is no pending or, to the Company’s knowledge, threatened action, suit, proceeding or claim by others: (A) challenging the Company’s rights in or to any Intellectual Property necessary for its business as now conducted and currently proposed to be conducted in the future, as described in the 2026 SEC Reports, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or claim; or (B) challenging the validity, enforceability or scope of any Intellectual Property necessary for its business as now conducted and currently proposed to be conducted in the future, as described in the 2026 SEC Reports, and the Company is unaware of any facts which would form a reasonable basis for any such action, suit, proceeding or claim.

(e) Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company has complied with the terms of each agreement pursuant to which Intellectual Property has been licensed to the Company as described in the 2026 SEC Reports, and all such agreements are in full force and effect.

(f) Except as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect, the Company has taken reasonable and customary actions to protect its rights in, and to prevent the unauthorized use and disclosure of, material trade secrets and confidential business information (including confidential ideas, research and development information, know-how, formulas, compositions, technical data, designs, drawings, specifications, research records, records of inventions, test information, financial, marketing and business data, supplier lists and information, and business plans) owned by the Company, and, to the knowledge of the Company, there has been no unauthorized use or disclosure of such material trade secrets and confidential business information.

3.13 Employee Benefits. Except as would not be reasonably likely to result in a Material Adverse Effect, each Benefit Plan has been established and administered in accordance with its terms and in compliance with the applicable provisions of ERISA, the Code, the Patient Protection and Affordable Care Act of 2010, as amended, and other applicable laws, rules and regulations. The Company is in compliance with all applicable federal, state and local laws, rules and regulations regarding employment, except for any failures to comply that are not reasonably likely, individually or in the aggregate, to have a Material Adverse Effect. There is no labor dispute, strike or work stoppage against the Company pending or, to the knowledge of the Company, threatened which may interfere with the business activities of the Company, except where such dispute, strike or work stoppage is not reasonably likely, individually or in the aggregate, to have a Material Adverse Effect.

3.14 Taxes. The Company has filed all federal income Tax Returns and other material Tax Returns required to have been filed under applicable law (or extensions have been duly obtained), and all such Tax Returns are true, complete and correct in all material respects. The Company has paid all Taxes required to have been paid by it (whether or not shown due on any Tax Return). The Company has complied in all material respects with all applicable laws relating to the payment and withholding of Taxes. The Company is not a party to any Tax Sharing Agreement. There are no Liens on any of the assets of the Company with respect to Taxes. No assessment on Taxes is pending, proposed, in progress, or threatened against the Company. All Tax deficiencies which have been proposed, asserted or assessed against the Company have been fully paid or finally settled. The Company has not received a notice of a claim by any Tax authority in any jurisdiction where the Company does not file tax returns that the Company is or may be subject to taxation by, or required to file tax returns with, that jurisdiction, and, to the knowledge of the Company, there is no basis for any such claim to be made. The Company has not constituted a “distributing corporation” or a “controlled corporation” under Section 355 of the Code. The Company is not, nor has it ever been, a “United States real property holding corporation” within the meaning of Section 897(c)(2) of the Code. The Company has not been included in an affiliated group (as defined in Section 1504 of the Code or any similar group under a corresponding or similar provision of state, local, or non-U.S. law) and is not liable for the Taxes of any other Person (i) under Treasury Regulations Section 1.1502-6 (or any corresponding or similar provision of state, local or non-U.S. law), or (ii) as a transferee or successor, by assumption or operation of law, or by Contract or otherwise. The charges, accruals and reserves on the books of the Company in respect of any income and corporation tax liability for any years not finally determined are adequate to meet any assessments or reassessments for additional income tax for any years not finally determined, except to the extent of any inadequacy that would not result in a Material Adverse Effect.

3.15 Environmental Laws. The Company (i) is in compliance with any and all applicable foreign, federal, state and local laws and regulations relating to the protection of human health and safety, the environment or hazardous or toxic substances or wastes, pollutants or contaminants (“Environmental Laws”), (ii) has received all permits and other Governmental Authorizations required under applicable Environmental Laws to conduct its business and (iii) is in compliance with all terms and conditions of any such permit, license or approval, except where such noncompliance with Environmental Laws, failure to receive required permits, licenses or other approvals or failure to comply with the terms and conditions of such permits, licenses or approvals would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. The Company has not received since January 1, 2024, any written notice or other communication (in writing or otherwise), whether from a governmental authority or other Person, that alleges that the Company is not in compliance with any Environmental Law and, to the knowledge of the Company, there are no circumstances that may prevent or interfere with the Company’s compliance in any material respects with any Environmental Law in the future, except where such failure to comply would not reasonably be expected to have a Material Adverse Effect. To the knowledge of the Company: (i) no current or (during the time a prior property was leased or controlled by the Company) prior property leased or controlled by the Company has received since January 1, 2024, any written notice or other communication relating to property owned or leased at any time by the Company, whether from a governmental authority, or other Person, that alleges that such current or prior owner or the Company is not in compliance with or violated any Environmental Law relating to such property and (ii) the Company has no material liability under any Environmental Law.

3.16 Title. The Company has good and marketable title to all personal property owned by it that is material to the business of the Company, free and clear of all liens, encumbrances and defects except such as do not materially affect the value of such property and do not interfere with the use made and proposed to be made of such property by the Company, as the case may be. Any real property and buildings held under lease by the Company is held under valid, subsisting and enforceable leases with such exceptions as are not material and do not interfere with the use made and proposed to be made of such property and buildings by the Company. The Company does not own any real property.

3.17 Insurance. The Company carries or is entitled to the benefits of insurance in such amounts and covering such risks that is customary for comparably situated companies and is adequate for the conduct of its business and the value of its properties and assets, and each of such insurance policies is in full force and effect and the Company is in compliance in all material respects with the terms thereof. Other than customary end of policy notifications from insurance carriers, since January 1, 2024, the Company has not received any notice or other communication regarding any actual or possible: (i) cancellation or invalidation of any insurance policy or (ii) refusal or denial of any coverage, reservation of rights or rejection of any material claim under any insurance policy.

3.18 Nasdaq Stock Market. The issued and outstanding shares of Common Stock are registered pursuant to Section 12(b) of the Exchange Act and are listed for trading on the Nasdaq Capital Market under the symbol “WHWK”. There is no suit, action, proceeding or investigation pending or, to the knowledge of the Company, threatened against the Company by Nasdaq or the SEC, respectively, to prohibit or terminate the listing of the Common Stock on the Nasdaq Capital Market or to deregister the Common Stock under the Exchange Act. The Company has taken no action that is designed to terminate the registration of the Common Stock under the Exchange Act.

3.19 ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act. The Company is, and since January 1, 2024 has been, in compliance in all material respects with applicable requirements of the ▇▇▇▇▇▇▇▇-▇▇▇▇▇ Act of 2002 and applicable rules and regulations promulgated by the SEC thereunder.

3.20 Regulatory.

(a) To the knowledge of the Company, the Company has operated its business and currently is in compliance in all material respects with all applicable Health Care Laws.

(b) There are no legal proceedings pending or, to the knowledge of the Company, threatened with respect to an alleged material violation by the Company of any Health Care Laws including FDA regulations adopted thereunder, or any other similar law promulgated by a Drug Regulatory Agency.

(c) The Company holds all required Governmental Authorizations issuable by any Drug Regulatory Agency necessary for the conduct of the business of the Company as currently conducted, and, as applicable, the development, testing, manufacturing, processing, storage, labeling, sale, marketing, advertising, distribution and importation or exportation, as currently conducted, of any of its products or product candidates (the “Company Products”) (the “Company Regulatory Permits”) and no such Company Regulatory Permit has been (i) revoked, withdrawn, suspended, cancelled or terminated or (ii) modified in any adverse manner other than immaterial adverse modifications. The Company has timely maintained and is in compliance in all material respects with the Company Regulatory Permits and the Company has not, since January 1, 2024, received any written notice or other written communication from any Drug Regulatory Agency regarding (A) any material violation of or failure to comply materially with any term or requirement of any Company Regulatory Permit or (B) any revocation, withdrawal, suspension, cancellation, termination or material modification of any Company Regulatory Permit.

(d) To the best of the Company’s knowledge, all the operations of the Company and all the manufacturing facilities and operations of the Company’s suppliers of products and product candidates and the components thereof manufactured in or imported into the United States are in material compliance with applicable FDA regulations, including current Good Manufacturing Practices, and meet sanitation standards set by the FDCA.

(e) No Person involved in development of any data included in the Company’s regulatory filings has been convicted of (or investigated for) any crime or engaged in conduct reasonably expected to result in exclusion under 42 U.S.C. Section 1302a-7 or any similar state law or regulation. None of the Company, and to the knowledge of the Company, any contract manufacturer with respect to any Company Product, or any of their respective officers, employees or agents has been convicted of any crime or engaged in any conduct that could result in a material debarment or exclusion (i) under 21 U.S.C. Section 335a or (ii) any similar applicable law.

(f) All clinical, pre-clinical and other studies and tests conducted by or on behalf of, or sponsored by, the Company or in which the Company or its respective product candidates, including the Company Products, have participated that are described in the 2026 SEC Reports or the results of which are referred to in the 2026 SEC Reports, were and, if still pending, are being conducted in compliance in all material respects with the applicable regulations of the Drug Regulatory Agencies and other applicable Health Care Laws, including, without limitation, 21 C.F.R. Parts 50, 54, 56, 58 and 312.

(g) Except as would not, singly or in the aggregate, reasonably be expected to result in a Material Adverse Effect, no manufacturing site owned by the Company, and to the knowledge of the Company, no manufacturing site of a contract manufacturer where any Company Products are currently manufactured, (i) is subject to a Drug Regulatory Agency shutdown or import or export prohibition or (ii) has received any Form FDA 483, notice of violation, warning letter, untitled letter, or similar correspondence or notice from the FDA or other governmental authority alleging or asserting noncompliance with any applicable law, in each case, that have not been complied with or closed to the satisfaction of the relevant governmental authority, and, to the knowledge of the Company, neither the FDA nor any other governmental authority is considering such action.

(h) The Company has conducted an assessment and determined that the Company does not (a) produce, design, test, manufacture, fabricate, or develop “critical technologies” as that term is defined in 31 C.F.R. § 800.215; (b) perform the functions as set forth in column 2 of Appendix A to 31 C.F.R. part 800 with respect to covered investment “critical infrastructure”; or (c) to the Company’s knowledge, maintain or collect, directly or indirectly, “sensitive personal data” as that term is defined in 31 C.F.R. § 800.241”).

3.21 Accounting Controls and Disclosure Controls and Procedures. The Company maintains a system of internal control over financial reporting (as defined in Rules 13a-15(f) and 15d-15(f) of the Exchange Act) that is sufficient to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with GAAP, including policies and procedures sufficient to provide reasonable assurance (i) that the Company maintains records that in reasonable detail accurately and fairly reflect the Company’s transactions and dispositions of assets, (ii) that transactions are recorded as necessary to permit preparation of financial statements in accordance with GAAP, (iii) that receipts and expenditures are made only in accordance with authorizations of management and the Board of Directors and (iv) regarding prevention or timely detection of the unauthorized acquisition, use or disposition of the Company’s assets that could have a material effect on the Company’s financial statements. Since December 31, 2025, the Company has not identified any material weaknesses in the design or operation of the Company’s internal control over financial reporting, and there has been no change in the Company’s internal control over financial reporting that has materially affected, or is reasonably likely to materially effect, the Company’s internal control over financial reporting. The Company’s “disclosure controls and procedures” (as defined in Rules 13a-15(e) and 15d-15(e) of the Exchange Act) are designed to provide reasonable assurance that all information (both financial and non-financial) required to be disclosed by the Company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the rules and forms of the SEC, and that all such information is accumulated and communicated to the Company’s management as appropriate to allow timely decisions regarding required disclosure.

3.22 Price Stabilization of Common Stock. The Company has not taken, nor will it take, directly or indirectly, any action designed to stabilize or manipulate the price of the Common Stock to facilitate the sale or resale of the Securities.

3.23 Investment Company Act. The Company is not, and immediately after receipt of payment for the Common Stock will not be, an “investment company” within the meaning of the Investment Company Act of 1940, as amended.

3.24 General Solicitation; No Integration or Aggregation. Neither the Company nor any other person or entity authorized by the Company to act on its behalf has engaged in a general solicitation or general advertising (within the meaning of Regulation D of the Securities Act) of investors with respect to offers or sales of Securities pursuant to this Agreement. The Company has not, directly or indirectly, sold, offered for sale, solicited offers to buy or otherwise negotiated in respect of, any security (as defined in the Securities Act) which, to its knowledge, is or will be (i) integrated with the Securities sold pursuant to this Agreement for purposes of the Securities Act or (ii) aggregated with prior offerings by the Company for the purposes of the rules and regulations of the Nasdaq Capital Market.

3.25 Brokers and Finders. Other than the Placement Agents, neither the Company nor any other Person authorized by the Company to act on its behalf has retained, utilized or been represented by any broker or finder in connection with the transactions contemplated by this Agreement.

3.26 Reliance by the Purchasers. The Company acknowledges that each of the Purchasers will rely upon the truth and accuracy of, and the Company’s compliance with, the representations, warranties, agreements, acknowledgements and understandings of the Company set forth herein.

3.27 No Disqualification Events. No “bad actor” disqualifying event described in Rule 506(d)(1)(i)-(viii) of the Securities Act (a “Disqualification Event”) is applicable to the Company or, to the knowledge of the Company, any Covered Person (as defined below), except for a Disqualification Event as to which Rule 506(d)(2)(ii–iv) or (d)(3), is applicable. “Covered Person” means, with respect to the Company as an “issuer” for purposes of Rule 506 promulgated under the Securities Act, any person listed in the first paragraph of Rule 506(d)(1). Other than the Placement Agents, the Company is not aware of any Person (other than any Covered Person) that has been or will be paid (directly or indirectly) remuneration for solicitation of purchasers in connection with the sale of the Securities pursuant to this Agreement.

3.28 No Additional Agreements. The Company does not have any agreement or understanding with any Purchaser with respect to the transactions contemplated by the Transaction Agreements other than as specified in the Transaction Agreements.

3.29 Anti-Bribery and Anti-Money Laundering Laws. Each of the Company and any of their respective officers, directors, supervisors, managers, agents, or employees are and have at all times been in compliance with and its participation in the offering will not violate: (A) anti-bribery laws, including but not limited to, any applicable law, rule, or regulation of any locality, including but not limited to any law, rule, or regulation promulgated to implement the OECD Convention on Combating Bribery of Foreign Public Officials in International Business Transactions, signed December 17, 1997, including the U.S. Foreign Corrupt Practices Act of 1977, as amended, the U.K. Bribery Act 2010, or any other law, rule or regulation of similar purposes and scope or (B) anti-money laundering laws, including, but not limited to, applicable federal, state, international, foreign or other laws, regulations or government guidance regarding anti-money laundering, including, without limitation, Title 18 US. Code sections 1956 and 1957, the Patriot Act, the Bank Secrecy Act, and international anti-money laundering principles or procedures by an intergovernmental group or organization, such as the Financial Action Task Force on Money Laundering, of which the United States is a member and with which designation the United States representative to the group or organization continues to concur, all as amended, and any executive order, directive, or regulation pursuant to the authority of any of the foregoing, or any orders or licenses issued thereunder.

3.30 Company IT Systems; Cybersecurity. The Company owns or have a valid right to access and use all computer systems, networks, hardware, software, databases, websites, and equipment used to process, store, maintain and operate data, information, and functions used in connection with the business of the Company (the “Company IT Systems”), except as would not, individually or in the aggregate, have a Material Adverse Effect. The Company IT Systems

are adequate for, and operate and perform in all material respects as required in connection with, the operation of the business of the Company as currently conducted, except as would not, individually or in the aggregate, have a Material Adverse Effect. The Company has implemented commercially reasonable backup, security and disaster recovery technology consistent in all material respects with applicable regulatory standards and customary industry practices. Except as would not reasonably be expected to have a Material Adverse Effect, (a) there has been no security breach or other compromise of or relating to the Company IT Systems; (b) the Company has not been notified of, and has no knowledge of any event or condition that would reasonably be expected to result in, any such security breach or other compromise of the Company IT Systems; (c) the Company has implemented policies and procedures with respect to the Company IT Systems that are reasonably consistent with industry standards and practices, or as required by applicable regulatory standards; and (d) the Company is presently in material compliance with all applicable laws or statutes, judgments, orders, rules and regulations of any court or arbitrator or governmental or regulatory authority and contractual obligations relating to the privacy and security of the Company IT Systems and to the protection of the Company IT Systems from unauthorized use, access, misappropriation or modification.

3.31 No Additional Agreements. The Company has no other agreements or understandings (including side letters) with any Purchaser or any other Person to purchase Common Stock or Pre-Funded Warrants on terms more favorable to such Purchaser than as set forth herein.

3.32 Transactions with Affiliates and Employees. Except for the transactions contemplated by the Transaction Agreements, no relationship, direct or indirect, exists between or among the Company, on the one hand, and the directors, officers, stockholders, customers or suppliers of the Company, on the other hand, that is required to be described in the SEC Reports that is not so described.

3.33 No Other Representations or Warranties. Except for the representations and warranties of the Company expressly set forth in this Section 3, with respect to the transactions contemplated by this Agreement, the Company (i) expressly disclaims any representations or warranties of any kind or nature, express or implied, including with respect to the condition, value or quality of the Company or any of the assets or properties of the Company, and (ii) specifically disclaims any representation or warranty of merchantability, usage, suitability or fitness for any particular purpose with respect to any of the assets or properties of the Company. Notwithstanding the foregoing, in making the decision to invest in the Securities, the Purchasers will rely, and the Company agrees that the Purchasers may rely, on the information that has been provided in writing to Purchasers by the Company or on behalf of the Company, including the SEC Reports.

4. Representations and Warranties of Each Purchaser. Each Purchaser, severally for itself and not jointly with any other Purchaser, represents and warrants to the Company and the Placement Agents that the statements contained in this Section 4 are true and correct as of the date hereof and the Closing Date:

4.1 Organization. Such Purchaser is duly organized, validly existing and in good standing under the laws of the jurisdiction of its organization and has the requisite power and authority to own, lease and operate its properties and to carry on its business as now conducted.

4.2 Authorization. Such Purchaser has all requisite corporate or similar power and authority to enter into this Agreement and the other Transaction Agreements to which it will be a party and to carry out and perform its obligations hereunder and thereunder. All corporate, member or partnership action on the part of such Purchaser or its stockholders, members or partners necessary for the authorization, execution, delivery and performance of this Agreement and the other Transaction Agreements to which it will be a party and the consummation of the other transactions contemplated herein has been taken. The signature of the Purchaser on this Agreement is genuine and the signatory to this Agreement, if the Purchaser is an individual, has the legal competence and capacity to execute the same or, if the Purchaser is not an individual, the signatory has been duly authorized to execute the same on behalf of the Purchaser. Assuming this Agreement constitutes the legal and binding agreement of the Company, this Agreement constitutes a legal, valid and binding obligation of such Purchaser, enforceable against such Purchaser in accordance with its terms, except as such enforceability may be limited or otherwise affected by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and/or similar laws relating to or affecting the rights of creditors generally or by general equity principles (regardless of whether such enforceability is considered in a proceeding in equity or at law).

4.3 No Conflict. The execution, delivery and performance of the Transaction Agreements by such Purchaser, the purchase of the Securities in accordance with their terms and the consummation by such Purchaser of the other transactions contemplated hereby will not conflict with or result in any violation of, breach or default by such Purchaser (with or without notice or lapse of time, or both) under, conflict with, or give rise to a right of termination, cancellation or acceleration of any obligation, a change of control right or to a loss of a material benefit under (i) any provision of the organizational documents of such Purchaser, including, without limitation, its incorporation or formation papers, bylaws, indenture of trust or partnership or operating agreement, as may be applicable or (ii) any agreement or instrument, undertaking, credit facility, franchise, license, judgment, order, ruling, statute, law, ordinance, rule or regulations, applicable to such Purchaser or its respective properties or assets, except, in the case of clause (ii), as would not, individually or in the aggregate, be reasonably expected to materially delay or hinder the ability of such Purchaser to perform its obligations under the Transaction Agreements (such delay or hindrance, a “Purchaser Adverse Effect”).

4.4 Consents. All consents, approvals, orders and authorizations required on the part of such Purchaser in connection with the execution, delivery or performance of this Agreement, the issuance of the Securities and the consummation of the other transactions contemplated herein have been obtained or made, other than such consents, approvals, orders and authorizations the failure of which to make or obtain, individually or in the aggregate, would not reasonably be expected to have a Purchaser Adverse Effect.

4.5 Residency. Such Purchaser’s residence (if an individual) or offices in which its investment decision with respect to the Securities was made (if an entity) are located at the address immediately below such Purchaser’s name on Exhibit A.

4.6 Brokers and Finders. Such Purchaser has not retained, utilized or been represented by any broker or finder in connection with the transactions contemplated by this Agreement whose fees the Company would be required to pay.

4.7 Investment Representations and Warranties. Each Purchaser hereby represents and warrants that, it (i) as of the date hereof is, and on each date on which it exercises the Pre-Funded Warrants, will be, if an entity, is a “qualified institutional buyer” (as defined in Rule 144A under the Securities Act) or an institutional “accredited investor” as that term is defined in Rule 501(a) under Regulation D promulgated pursuant to the Securities Act; or (ii) if an individual, is an “accredited investor” as that term is defined in Rule 501(a) of Regulation D of the Securities Act and has such knowledge and experience in financial and business matters as to be able to protect such Purchaser’s own interests in connection with an investment in the Securities. Each Purchaser further represents and warrants that (x) such Purchaser is capable of evaluating the merits and risk of such investment, and (y) that it has not been organized for the purpose of acquiring the Securities and is an “institutional account” as defined by FINRA Rule 4512(c). Such Purchaser understands and agrees that the offering and sale of the Securities has not been registered under the Securities Act or any applicable state securities laws and is being made in reliance upon federal and state exemptions for transactions not involving a public offering which depend upon, among other things, the bona fide nature of the investment intent and the accuracy of such Purchaser’s representations as expressed herein.

4.8 Intent. Each Purchaser is purchasing the Shares and, if applicable, Pre-Funded Warrants, and, upon the exercise of the Pre-Funded Warrants, will acquire the Warrant Shares issuable upon exercise thereof, solely for investment purposes, for such Purchaser’s own account or the account of parent fund(s) that own the Purchaser, and not with a view towards, or for offer or sale in connection with, any distribution or dissemination thereof. Notwithstanding the foregoing, if such Purchaser is purchasing the Securities as a fiduciary or agent for one or more investor accounts, such Purchaser has full investment discretion with respect to each such account, and the full power and authority to make the acknowledgements, representations and agreements herein on behalf of each owner of each such account. Each Purchaser has no present arrangement to sell the Securities to or through any person or entity. Each Purchaser understands that the Securities must be held indefinitely unless such Securities are resold pursuant to a registration statement under the Securities Act or an exemption from registration is available.

4.9 Investment Experience; Ability to Protect Its Own Interests and Bear Economic Risks. Each Purchaser, or the Purchaser’s professional advisors, have such knowledge and experience in finance, securities, taxation, investments and other business matters as to be capable of evaluating the merits and risks of investments of the kind described in this Agreement, and the Purchaser has had an opportunity to seek, and has sought, such accounting, legal, business and tax advice as such Purchaser has considered necessary to make an informed investment decision. By reason of the business and financial experience of such Purchaser or such Purchaser’s professional advisors (who are not affiliated with or compensated in any way by the Company or any of its affiliates or selling agents), such Purchaser can protect such Purchaser’s own interests in connection with the transactions described in this Agreement. Each Purchaser acknowledges that such Purchaser (i) is a sophisticated investor, experienced in investing in private placements of equity securities and capable of evaluating investment risks independently, both in general and with regard to all transactions and investment strategies involving a security or securities and (ii) has exercised independent judgment in evaluating its participation in the purchase of the Securities. Each Purchaser acknowledges that such Purchaser is aware that there are substantial risks incident to the purchase and ownership of the Securities, including those set forth in the Company’s filings with the SEC. Alone, or together with any professional advisor(s), such Purchaser has adequately analyzed and fully considered the risks of an investment in the Securities and determined that the Securities are a suitable investment for the Purchaser. Each Purchaser is, at this time and in the foreseeable future, able to afford the loss of such Purchaser’s entire investment in the Securities and such Purchaser acknowledges specifically that a possibility of total loss exists.

4.10 Tax Advisors. Such Purchaser has had the opportunity to review with such Purchaser’s own tax advisors the federal, state and local tax consequences of its purchase of the Securities set forth opposite such Purchaser’s name on Exhibit A, where applicable, and the transactions contemplated by this Agreement. Such Purchaser acknowledges that Purchaser shall be responsible for any of such Purchaser’s tax liabilities that may arise as a result of the transactions contemplated by this Agreement, and that the Company and any of its agents have not provided any tax advice or any other representation or guarantee regarding the tax consequences of the transactions contemplated by the Agreement.

4.11 Securities Not Registered; Legends. Such Purchaser acknowledges and agrees that the Securities are being offered in a transaction not involving any public offering within the meaning of the Securities Act, and such Purchaser understands that the Securities have not been registered under the Securities Act, by reason of their issuance by the Company in a transaction exempt from the registration requirements of the Securities Act, and that the Securities must continue to be held and may not be offered, resold, transferred, pledged or otherwise disposed of by such Purchaser unless a subsequent disposition thereof is registered under the Securities Act or is exempt from such registration and in each case in accordance with any applicable securities laws of any state of the United States. Such Purchaser understands that the exemptions from registration afforded by Rule 144 (the provisions of which are known to it) promulgated under the Securities Act depend on the satisfaction of various conditions including, but not limited to, the time and manner of sale, the holding period and on requirements relating to the Company which are outside of such Purchaser’s control and which the Company may not be able to satisfy, and that, if applicable, Rule 144 may afford the basis for sales only in limited amounts. Such Purchaser acknowledges and agrees that it has been advised to consult legal counsel prior to making any offer, resale, transfer, pledge or disposition of any of the Securities. Such Purchaser acknowledges that no federal or state agency has passed upon or endorsed the merits of the offering of the Securities or made any findings or determination as to the fairness of this investment.

Each Purchaser understands that the Securities may bear one or more legends in substantially the following form and substance:

“THESE SECURITIES ARE BEING OFFERED TO INVESTORS WITHOUT REGISTRATION WITH THE UNITED STATES SECURITIES AND EXCHANGE COMMISSION UNDER THE SECURITIES ACT IN RELIANCE UPON REGULATION D PROMULGATED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (“THE SECURITIES ACT”). TRANSFER OF THESE SECURITIES IS PROHIBITED, EXCEPT PURSUANT TO REGISTRATION UNDER THE SECURITIES ACT, OR PURSUANT TO AVAILABLE EXEMPTION FROM REGISTRATION. HEDGING TRANSACTIONS MAY NOT BE CONDUCTED UNLESS IN COMPLIANCE WITH THE SECURITIES ACT.”

In addition, stock certificates representing the Securities may contain a legend regarding affiliate status of the Purchaser, if applicable.

4.12 Placement Agent. Each Purchaser hereby acknowledges and agrees that (a) each Placement Agent is acting solely as placement agent in connection with the execution, delivery and performance of the Transaction Agreements and the issuance of the Securities to such Purchaser and neither the Placement Agent nor any of their respective affiliates has acted as an underwriter or in any other capacity and is not and shall not be construed as a fiduciary or financial advisor for such Purchaser, the Company or any other person or entity in connection with the execution, delivery and performance of the Transaction Agreements and the issuance and purchase of the Securities, (b) each Placement Agent has not made and does not make any representation or warranty, whether express or implied, of any kind or character, or has not provided any advice or recommendation in connection with the execution, delivery and performance of the Transaction Agreements or with respect to the Securities, nor is such information or advice necessary or desired, (c) each Placement Agent will not have any responsibility with respect to (i) any representations, warranties or agreements made by any person or entity under or in connection with the execution, delivery and performance of the Transaction Agreements, or the execution, legality, validity or enforceability (with respect to any person) thereof, or (ii) the business, affairs, financial condition, operations, properties or prospects of, or any other matter concerning the Company, and (d) each Placement Agent will not have any liability or obligation (including without limitation, for or with respect to any losses, claims, damages, obligations, penalties, judgments, awards, liabilities, costs, expenses or disbursements incurred by such Purchaser, the Company or any other person or entity), whether in contract, tort or otherwise, to such Purchaser, or to any person claiming through it, in respect of the execution, delivery and performance of the Transaction Agreements, except in each case for such party’s own gross negligence, willful misconduct or bad faith. No disclosure or offering document has been prepared by the Placement Agents or any of their respective affiliates in connection with the offer and sale of the Securities. Neither the Placement Agents nor any of their respective affiliates has made or makes any representation as to the quality or value of the Securities and the Placement Agents and any of their respective affiliates may have acquired non-public information with respect to the Company which Purchaser agrees need not be provided to it.

4.13 Reliance by the Company. Such Purchaser acknowledges that the Company will rely upon the truth and accuracy of, and the Purchaser’s compliance with, the representations, warranties, agreements, acknowledgements and understandings of such Purchaser set forth herein.

4.14 No General Solicitation. The Purchaser acknowledges and agrees that the Purchaser is purchasing the Securities directly from the Company. Purchaser became aware of this offering of the Securities solely by means of direct contact from the Placement Agents or directly from the Company as a result of a pre-existing, substantive relationship with the Company or the Placement Agents, and/or their respective advisors (including, without limitation, attorneys, accountants, bankers, consultants and financial advisors), agents, control persons, representatives, affiliates, directors, officers, managers, members, and/or employees, and/or the representatives of such persons. The Securities were offered to Purchaser solely by direct contact between Purchaser and the Company, the Placement Agents and/or their respective representatives. Purchaser did not become aware of this offering of the Securities, nor were the Securities offered to Purchaser, by any other means, and none of the Company, the Placement Agents and/or their respective

representatives acted as investment advisor, broker or dealer to Purchaser. The Purchaser is not purchasing the Securities as a result of any advertisement, article, notice or other communication regarding the Securities published in any newspaper, magazine or similar media or broadcast over television, radio or the internet or presented at any seminar or any other general solicitation or general advertisement, including any of the methods described in Section 502(c) of Regulation D under the Securities Act.

4.15 No Reliance. The Purchaser further acknowledges that there have not been and Purchaser hereby agrees that it is not relying on and has not relied on, any statements, representations, warranties, covenants or agreements made to the Purchaser by or on behalf of the Company, any of its affiliates or any control persons, officers, directors, employees, partners, agents or representatives of any of the foregoing or any other person or entity (including the Placement Agents), expressly or by implication, other than the SEC Reports and those representations, warranties and covenants of the Company expressly set forth in this Agreement.

4.16 Access to Information. In making its decision to purchase the Securities, Purchaser has relied solely upon independent investigation made by Purchaser and upon the representations, warranties and covenants set forth herein. The Purchaser acknowledges and agrees that the Purchaser has received such information as the Purchaser deems necessary in order to make an investment decision with respect to the Securities, including, with respect to the Company. Without limiting the generality of the foregoing, each Purchaser acknowledges that such Purchaser has had an opportunity to review the 2026 SEC Reports filed prior to the date hereof. The Purchaser acknowledges and agrees that the Purchaser and the Purchaser’s professional advisor(s), if any, have had the opportunity to ask such questions, receive such answers and obtain such information as the Purchaser and such Purchaser’s professional advisor(s), if any, have deemed necessary to make an investment decision with respect to the Securities and that the Purchaser has independently made his, her or its own analysis and decision to invest in the Company.

4.17 Certain Trading Activities. Other than consummating the transactions contemplated hereby, the Purchaser has not, nor has any Person acting on behalf of or pursuant to any understanding with such Purchaser, directly or indirectly executed any purchases or sales, including Short Sales, of the securities of the Company during the period commencing as of the time that such Purchaser was first contacted by the Company or any other Person regarding the transaction contemplated hereby and ending immediately prior to the date hereof. Notwithstanding the foregoing, in the case of a Purchaser that is a multi-managed investment vehicle whereby separate portfolio managers manage separate portions of such Purchaser’s assets and the portfolio managers have no direct knowledge of the investment decisions made by the portfolio managers managing other portions of such Purchaser’s assets, the representation set forth above shall only apply with respect to the portion of the assets managed by the portfolio manager that made the investment decision to purchase the Securities covered by this Agreement. Other than to other Persons party to this Agreement, such Purchaser has maintained the confidentiality of all disclosures made to it in connection with this transaction (including the existence and terms of this transaction), other than to such Purchaser’s outside attorney, accountant, auditor or investment advisor only to the extent necessary to permit evaluation of the investment, and the performance of the necessary or required tax, accounting, financial, legal, or administrative tasks and services and other than as may be required by law. Notwithstanding the foregoing, for avoidance of doubt, nothing contained herein shall constitute a representation or warranty, or preclude any actions, with respect to the identification of the availability of, or securing of, available shares to borrow in order to effect Short Sales or similar transactions in the future.

4.18 Disqualification Event. To the extent the Purchaser is one of the covered persons identified in Rule 506(d)(1), the Purchaser represents that no disqualifying event described in Rule 506(d)(1)(i-viii) of the Securities Act (a “Disqualification Event”) is applicable to the Purchaser or any of its Rule 506(d) Related Parties (as defined below), except, if applicable, for a Disqualification Event as to which Rule 506(d)(2)(ii) or (iii) or (d)(3) is applicable. The Purchaser hereby agrees that it shall notify the Company promptly in writing in the event a Disqualification Event becomes applicable to the Purchaser or any of its Rule 506(d) Related Parties, except, if applicable, for a Disqualification Event as to which Rule 506(d)(2)(ii) or (iii) or (d)(3) is applicable. For purposes of this Section, “Rule 506(d) Related Party” shall mean a person or entity that is a beneficial owner of the Purchaser’s securities for purposes of Rule 506(d) of the Securities Act.

4.19 Defense Production Act Compliance.

(a) Except for any purchaser designated as a “Known Foreign Purchaser” on Exhibit A, below, each Purchaser is not and is not controlled by a “foreign person,” as defined in Section 721 of the Defense Production Act of 1950, as amended, including all implementing regulations thereof (the “DPA”), and each Purchaser does not permit any foreign person affiliated with the Purchaser, whether affiliated as a limited partner or otherwise, to obtain through the Purchaser as a result of that foreign person’s investment any of the following with respect to the Company: (i) access to any “material nonpublic technical information” (as defined in the DPA) in the possession of the Company; (ii) membership or observer rights on the Board of Directors or equivalent governing body of the Company or the right to nominate an individual to a position on the Board of Directors or equivalent governing body of the Company; (iii) any involvement, other than through the voting of shares, in the substantive decision-making of the Company regarding (x) the use, development, acquisition, or release of any “critical technology” (as defined in the DPA), (y) the use, development, acquisition, safekeeping, or release of “sensitive personal data” (as defined in the DPA) of U.S. citizens maintained or collected by the Company, or (z) the management, operation, manufacture, or supply of “covered investment critical infrastructure” (as defined in the DPA); or (iv) “control” of the Company (as defined in the DPA) ((i)-(iv) being the “DPA Triggering Rights”).

(b) Each Known Foreign Purchaser will not obtain any DPA Triggering Rights or 10% or more of the Company’s Common Stock, or permit any foreign person affiliated with such Purchaser to obtain any such rights as a result of that Purchaser’s investment.

4.20 Acknowledgments Regarding Placement Agents. Each Purchaser acknowledges that each Placement Agent is acting as a placement agent on a “best efforts” basis for the Securities being offered hereby and will be compensated by the Company for acting in such capacity. Each Purchaser represents that such Purchaser was contacted regarding the sale of the Securities by the Placement Agents or the Company (or an authorized agent or representative thereof) with whom the Purchaser entered into a verbal or written confidentiality agreement. Each Purchaser represents that it is making this investment based on the results of its own due diligence

investigation of the Company, and has not relied on any information or advice furnished by or on behalf of the Placement Agents in connection with the transactions contemplated hereby. Each Purchaser acknowledges that the Placement Agents have not made, and will not make, any representations and warranties with respect to the Company or the transactions contemplated hereby, and the Purchaser will not rely on any statements made by the Placement Agents, orally or in writing, to the contrary.

5. Covenants.

5.1 Further Assurances. Each party agrees to cooperate with each other and their respective officers, employees, attorneys, accountants and other agents, and, generally, do such other reasonable acts and things in good faith as may be necessary to effectuate the intents and purposes of this Agreement, subject to the terms and conditions hereof and compliance with applicable law, including taking reasonable action to facilitate the filing of any document or the taking of reasonable action to assist the other parties hereto in complying with the terms hereof. The Purchaser acknowledges that the Company and the Placement Agents will rely on the acknowledgments, understandings, agreements, representations and warranties contained in this Agreement. Prior to the Closing, the Purchaser agrees to promptly notify the Company if any of the acknowledgments, understandings, agreements, representations and warranties set forth in Section 4 of this Agreement are no longer accurate.

5.2 Listing. The Company shall cause the Notification Form: Listing of Additional Shares covering all of the Shares and Warrant Shares to be prepared and filed in the manner required by Nasdaq. The Company shall use commercially reasonable efforts to maintain the listing of its Common Stock on the Nasdaq Capital Market.

5.3 Disclosure of Transactions. Notwithstanding anything in this Agreement to the contrary, the Company shall not publicly disclose the name of any Purchaser or any of its affiliates or advisers, or include the name of any Purchaser or any of its affiliates or advisers in any press release or filing with the SEC (other than any registration statement contemplated by the Registration Rights Agreement) or any regulatory agency, without the prior written consent of such Purchaser, except (i) as required by the federal securities law in connection with (A) any registration statement contemplated by the Registration Rights Agreement and (B) the filing of final Transaction Agreements (including signature pages thereto) with the SEC or pursuant to other routine proceedings of regulatory authorities, or (ii) to the extent such disclosure is required by law, at the request of the staff of the SEC or regulatory agency or under the regulations of the Nasdaq Capital Market, in which case the Company will provide the Purchaser with prior written notice (including by e-mail) of and an opportunity to review such disclosure under this clause (ii).

5.4 Integration. The Company has not sold, offered for sale or solicited offers to buy and shall not, and shall use its commercially reasonable efforts to ensure that no Affiliate of the Company shall, sell, offer for sale or solicit offers to buy or otherwise negotiate in respect of any security (as defined in Section 2 of the Securities Act) that will be integrated with the offer or sale of the Securities in a manner that would require the registration under the Securities Act of the sale of the Securities to the Purchasers, or that will be integrated with the offer or sale of the Securities for purposes of the rules and regulations of Nasdaq such that it would require stockholder approval prior to the closing of such other transaction unless stockholder approval is obtained before the closing of such subsequent transaction.

5.5 Pledge of Securities. The Company acknowledges and agrees that the Securities may be pledged by a Purchaser in connection with a bona fide margin agreement or other loan or financing arrangement that is secured by the Securities. The pledge of Securities shall not be deemed to be a transfer, sale or assignment of the Securities hereunder, and no Purchaser effecting a pledge of Securities shall be required to provide the Company with any notice thereof or otherwise make any delivery to the Company pursuant to this Agreement. The Company hereby agrees to execute and deliver such documentation as a pledgee of the Securities may reasonably request in connection with a pledge of the Securities to such pledgee by a Purchaser; provided that any and all costs to effect the pledge of the Securities are borne by the pledgor and/or pledgee and not the Company. Notwithstanding the foregoing, any Purchaser that is subject to the Company’s ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ Policy must comply with such policy as it may pertain to any pledges of Securities.

5.6 Subsequent Equity Sales. From the date hereof until the business day immediately following the effective date of the registration statement filed pursuant to the Registration Rights Agreement, without the consent of ▇▇▇▇▇▇▇▇▇ LLC, Leerink Partners LLC and the Purchasers of at least a majority in interest of the Securities then held by Purchasers, the Company shall not (a) issue shares of Common Stock or Common Stock Equivalents, or (b) file with the SEC a registration statement under the Securities Act relating to any shares of Common Stock or Common Stock Equivalents. Notwithstanding the foregoing, the provisions of this Section 5.6 shall not apply to (i) the issuance of the Securities hereunder, (ii) the transactions contemplated by the Registration Rights Agreement, (iii) the issuance of Common Stock upon the exercise of any options or warrants outstanding on the date hereof, (iv) the issuance of Common Stock or Common Stock Equivalents to employees, directors or consultants pursuant to (a) any stock option or equity incentive or employee stock purchase plan in effect on the date hereof, or (b) any compensation agreements, (v) the issuance of Common Stock in connection with acquisitions or strategic transactions, provided that any such issuance shall only be to a Person which is, itself or through its subsidiaries, an operating company in a business synergistic with the business of the Company, but shall not include a transaction in which the Company is issuing securities primarily for the purpose of raising capital or to an entity whose primary business is investing in securities and (vi) the filing of a registration statement on Form S-8; provided that the aggregate number of shares of Common Stock issued in accordance with clause (v) of this Section 5.6 do not exceed 5% of the number of shares of Common Stock outstanding immediately after the issuance and sale of the Securities.

5.7 Reservation of Common Stock; Registration of Warrant Shares. As of the date hereof, the Company has reserved and the Company shall continue to reserve and keep available at all times, free of preemptive rights, a sufficient number of shares of Common Stock for the purpose of enabling the Company to issue all of the Warrant Shares upon conversion of any Pre-Funded Warrant. The Company shall, at all times while any Pre-Funded Warrants are outstanding, use its best efforts to maintain a registration statement covering the exercise of the Pre-Funded Warrants and the issue and sale of the Warrant Shares such that the Warrant Shares, when issued, will not be subject to resale restrictions under the Securities Act except to the extent that the Warrant Shares are owned by affiliates.

5.8 Use of Proceeds. The Company shall use the proceeds from the sale of the Securities for working capital and general corporate purposes, including advancing its Antibody Drug Conjugates pipeline and related development activities.

5.9 Removal of Legends.

(a) In connection with any sale, assignment, transfer or other disposition of the Shares or Warrant Shares by a Purchaser pursuant to Rule 144 or pursuant to any other exemption under the Securities Act such that the purchaser acquires freely tradable shares and upon compliance by the Purchaser with the requirements of this Agreement, if requested by the Purchaser by notice to the Company, the Company shall request the Transfer Agent to remove any restrictive legends related to the book entry account holding such shares and make a new, unlegended entry for such book entry shares sold or disposed of without restrictive legends within one business day of any such request therefor from such Purchaser, provided that the Company has timely received from the Purchaser customary representations and other documentation reasonably acceptable to the Company in connection therewith. The Company shall be responsible for the fees of its Transfer Agent, its legal counsel and all DTC fees associated with such legend removal.

(b) Subject to receipt from the Purchaser by the Company and the Transfer Agent of customary representations and other documentation reasonably acceptable to the Company and the Transfer Agent in connection therewith, upon the earliest of such time as the Shares or Warrant Shares (i) have been registered under the Securities Act pursuant to an effective registration statement, (ii) have been sold pursuant to Rule 144, or (iii) are eligible for resale under Rule 144(b)(1) or any successor provision, the Company shall, in accordance with the provisions of this Section 5.9(b) and within one business day of any request therefor from a Purchaser accompanied by such customary and reasonably acceptable documentation referred to above, (A) deliver to the Transfer Agent irrevocable instructions that the Transfer Agent shall make a new, unlegended entry for such book entry shares, and (B) cause its counsel to deliver to the Transfer Agent one or more opinions to the effect that the removal of such legends in such circumstances may be effected under the Securities Act if required by the Transfer Agent to effect the removal of the legend in accordance with the provisions of this Agreement. Any shares subject to legend removal under this Section 5.9 may be transmitted by the Transfer Agent to the Purchaser by crediting the account of the Purchaser’s prime broker with the DTC System as directed by such Purchaser. The Company shall be responsible for the fees of its Transfer Agent and all DTC fees associated with such issuance.

5.10 Indemnification.

(a) The Company agrees to indemnify and hold harmless each Purchaser and its Affiliates, and their respective directors, officers, trustees, members, managers, employees, investment advisers and agents (collectively, the “Indemnified Persons”), from and against any and all losses, claims, damages, liabilities and expenses (including without limitation reasonable and documented out-of-pocket attorney fees and disbursements and other documented out-of-pocket expenses reasonably incurred in connection with investigating, preparing or defending any action, claim or proceeding, pending or threatened and the costs of enforcement thereof) to which such Person may become subject (i) as a result of any breach of representation,

warranty, covenant or agreement made by or to be performed on the part of the Company under the Transaction Agreements or (ii) as a result of or arising out of any action, claim or proceeding, pending or threatened, against an Indemnified Person in any capacity by a stockholder of the Company (whether directly or in a derivative capacity) who is not an Affiliate of the Indemnified Person with respect to the transactions contemplated by the Transaction Agreements, and will reimburse any such Indemnified Person for all such amounts solely to the extent such amounts have been finally judicially determined not to have resulted from such Indemnified Person’s breach of its representations, warranties or covenants under this Agreement (if applicable) or any violations by the Purchaser of state or federal securities laws or any conduct by such Purchaser which constitutes fraud, gross negligence, willful misconduct, bad faith or malfeasance.

(b) Any Indemnified Person entitled to indemnification hereunder shall (i) give prompt written notice to the Company of any claim with respect to which it seeks indemnification and (ii) permit the Company to assume the defense of such claim with counsel reasonably satisfactory to the Indemnified Person; provided that any Indemnified Person entitled to indemnification hereunder shall have the right to employ separate counsel and to participate in the defense of such claim, but the fees and expenses of such counsel shall be at the expense of such Indemnified Person unless (A) the Company has agreed in writing to pay such fees or expenses, (B) the Company shall have failed to assume the defense of such claim and employ counsel reasonably satisfactory to such Indemnified Person or (C) in the reasonable judgment of such Indemnified Person, based upon written advice of its outside legal counsel, a conflict of interest exists between such Indemnified Person and the Company with respect to such claims (in which case, if such Indemnified Person notifies the Company in writing that such Indemnified Person elects to employ separate counsel at the expense of the Company, the Company shall not have the right to assume the defense of such claim on behalf of such Indemnified Person); and provided, further, that the failure of any Indemnified Person to give written notice as provided herein shall not relieve the Company of its obligations hereunder, except to the extent that such failure to give notice shall materially adversely affect the Company in the defense of any such claim or litigation. It is understood that the Company shall not, in connection with any proceeding in the same jurisdiction, be liable for fees or expenses of more than one separate firm of attorneys at any time for all such Indemnified Persons. The Company will not, except with the consent of the Indemnified Person, which consent shall not be unreasonably withheld, conditioned or delayed, consent to entry of any judgment or enter into any settlement unless such judgment or settlement (1) imposes no liability or obligation on, (2) includes as an unconditional term thereof the giving of a complete, explicit and unconditional release from the party bringing such indemnified claims of all liability of the Indemnified Person in respect of such claim or litigation in favor of, and (3) does not include any admission of fault, culpability, wrongdoing, or wrongdoing or malfeasance by or on behalf of, the Indemnified Person. The Company shall not be liable for any settlement of any action, claim or proceeding effected without its prior written consent, which consent shall not be unreasonably withheld, delayed or conditioned.

5.11 Lock-Up Agreements. The Company shall cause each of its executive officers and directors (in their capacities in such positions) to enter into a lock-up agreement as of the date hereof in the form attached hereto as Exhibit E (each, a “Lock-Up Agreement,” and collectively, the “Lock-Up Agreements”). The Company shall not amend, modify, waive or terminate any provision of any of the Lock-Up Agreements except to extend the term of the lock-up period and shall enforce each Lock-Up Agreement in accordance with its terms. If any party to a Lock-Up Agreement breaches any provision of a Lock-Up Agreement, the Company shall promptly use its best efforts to seek specific performance of the terms of such Lock-Up Agreement.

6. Conditions of Closing.

6.1 Conditions to the Obligation of the Purchasers. The several obligations of each Purchaser to consummate the transactions to be consummated at the Closing, and to purchase and pay for the Securities being purchased by it at the Closing pursuant to this Agreement, are subject to the satisfaction or waiver in writing of the following conditions precedent:

(a) Representations and Warranties. The representations and warranties of the Company contained herein shall be true and correct on and as of the Closing Date with the same force and effect as though made on and as of the Closing Date (it being understood and agreed by each Purchaser that for purposes of this Section 6.1(a), in the case of any representation and warranty of the Company contained herein (i) which is not hereinabove qualified by application thereto of a materiality standard, such representation and warranty need be true and correct only in all material respects; provided that (x) the representations and warranties of the Company contained in Sections 3.1, 3.4 and 3.5 shall be true and correct in all respects, and (y) the representations and warranties of the Company contained in Section 3.2 shall be true and correct in all respects, other than for de minimis inaccuracies, or (ii) which is made as of a specific date, such representation and warranty need be true and correct only as of such specific date) and consummation of the Closing shall constitute a reaffirmation by the Company of each of the representations and warranties of the Company contained in this Agreement as of the Closing Date.

(b) Performance. The Company shall have performed in all material respects all obligations and conditions herein required to be performed or observed by the Company on or prior to the Closing Date.

(c) No Injunction. The purchase of and payment for the Securities by each Purchaser shall not be prohibited or enjoined by any law or governmental or court order or regulation and no such prohibition shall have been threatened in writing.

(d) Consents. The Company shall have obtained the consents, permits, approvals, registrations and waivers necessary for the consummation of the purchase and sale of the Securities.

(e) Transfer Agent. The Company shall have furnished all required materials to the Transfer Agent to reflect the issuance of the Shares at the Closing.

(f) Adverse Changes. Since the date hereof, no event or series of events shall have occurred that has had or would reasonably be expected to have a Material Adverse Effect.

(g) Opinion of Company Counsel. The Company shall have delivered to the Purchasers and the Placement Agents the opinion of ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, P.C., dated as of the Closing Date in customary form and substance to be reasonably agreed upon with the Purchasers.

(h) Compliance Certificate. The Chief Executive Officer of the Company shall have delivered to the Purchasers at the Closing Date a certificate in form and substance reasonably satisfactory to the Purchasers certifying that the conditions specified in Sections 6.1(a) (Representations and Warranties), 6.1(b) (Performance), 6.1(c) (No Injunction) and 6.1(k) (Listing Requirements) of this Agreement have been fulfilled.

(i) Secretary’s Certificate. The Secretary of the Company shall have delivered to the Purchasers at the Closing Date a certificate certifying (i) the Amended and Restated Certificate of Incorporation; (ii) the Amended and Restated Bylaws; and (iii) resolutions of the Company’s Board of Directors (or an authorized committee thereof) approving this Agreement and the transactions contemplated by this Agreement.

(j) Registration Rights Agreement. The Company shall have executed and delivered the Registration Rights Agreement in the form attached hereto as Exhibit C (the “Registration Rights Agreement”) to the Purchasers.

(k) Listing Requirements. The Common Stock shall be listed on a National Exchange and shall not have been suspended, as of the Closing Date, by the SEC or the National Exchange from trading thereon nor shall suspension by the SEC or the National Exchange have been threatened, as of the Closing Date, either (i) in writing by the SEC or the National Exchange or (ii) by falling below the minimum listing maintenance requirements of the National Exchange (with a reasonable prospect of delisting occurring after giving effect to all applicable notice, appeal, compliance and hearing periods); and the Company shall have filed with Nasdaq a Notification Form: Listing of Additional Shares for the listing of the Shares and Warrant Shares and shall have received confirmation from Nasdaq that it has completed its review of such form with no objections to the transactions contemplated herein.

6.2 Conditions to the Obligation of the Company. The obligation of the Company to consummate the transactions to be consummated at the Closing, and to issue and sell to each Purchaser the Securities to be purchased by it at the Closing pursuant to this Agreement, is subject to the satisfaction or waiver in writing of the following conditions precedent:

(a) Representations and Warranties. The representations and warranties contained herein of each Purchaser shall be true and correct on and as of the Closing Date, with the same force and effect as though made on and as of the Closing Date (it being understood and agreed by the Company that, in the case of any representation and warranty of a Purchaser contained herein which is not hereinabove qualified by application thereto of a materiality standard, such representation and warranty need be true and correct only in all material respects; provided that the representations and warranties of a Purchaser contained in Sections 4.1 and 4.2 shall be true and correct in all respects) and consummation of the Closing shall constitute a reaffirmation by the Purchaser of each of the representations, warranties, covenants and agreements of the Purchaser contained in this Agreement as of the Closing Date.

(b) Performance. Each Purchaser shall have performed in all material respects all obligations and conditions herein required to be performed or observed by such Purchaser on or prior to the Closing Date.

(c) Injunction. The purchase of and payment for the Securities by each Purchaser shall not be prohibited or enjoined by any law or governmental or court order or regulation.

(d) Registration Rights Agreement. Each Purchaser shall have executed and delivered the Registration Rights Agreement to the Company in the form attached as Exhibit C.

(e) Payment. The Company shall have received payment, by wire transfer of immediately available funds, in the full amount of the purchase price for the number of Securities being purchased by each Purchaser at the Closing as set forth in Exhibit A.

7. Termination.

7.1 Conditions of Termination. This Agreement shall terminate and be void and of no further force and effect, and all obligations of the parties hereunder shall terminate without any further liability on the part of any party in respect thereof, upon the earlier to occur of (a) the mutual written agreement of the Company and each of the Purchasers, (b) if, on the Closing Date, any of the conditions of Closing set forth in Section 6 have not been satisfied as of the time required hereunder to be so satisfied or waived by the party entitled to grant such waiver, or are not capable of being satisfied and, as a result thereof, the transactions contemplated by this Agreement will not be and are not consummated, or (c) if the Closing has not occurred on or before May 22, 2026, other than as a result of a Willful Breach of a Purchaser’s obligations hereunder; provided, however, that nothing herein shall relieve any party to this Agreement of any liability for common law fraud or for any Willful Breach of any representation, warranty, covenant, obligation or other provision contained in this Agreement and each party will be entitled to any remedies at law or in equity to recover losses, liabilities or damages arising from any such Willful Breach. “Willful Breach” means a deliberate act or deliberate failure to act, taken with the actual knowledge that such act or failure to act would result in or constitute a material breach of this Agreement.

8. Miscellaneous Provisions.

8.1 Public Statements or Releases; Use of Name and Logo.

(a) Except as set forth in Section 5.3, neither the Company nor any Purchaser shall make any public announcement with respect to the existence or terms of this Agreement or the transactions provided for herein without the prior approval of the other parties. Notwithstanding the foregoing, and subject to compliance with Section 5.3, nothing in this Section 8.1 shall prevent any party from making any public announcement it considers necessary in order to satisfy its obligations under the law, including applicable securities laws, or under the rules of any national securities exchange.

(b) The Company grants the Purchasers permission to use the Company’s name and logo in marketing materials, limited to customary tombstone announcements, of the Purchasers and their respective Affiliates.

8.2 Interpretation. The words “hereof,” “herein” and “hereunder” and words of similar import when used in this Agreement will refer to this Agreement as a whole and not to any particular provision of this Agreement, and section and subsection references are to this Agreement unless otherwise specified. The headings in this Agreement are included for convenience of reference only and will not limit or otherwise affect the meaning or interpretation of this Agreement. Whenever the words “include,” “includes” or “including” are used in this Agreement, they will be deemed to be followed by the words “without limitation.” The phrases “the date of this Agreement,” “the date hereof” and terms of similar import, unless the context otherwise requires, will be deemed to refer to the date set forth in the first paragraph of this Agreement. The meanings given to terms defined herein will be equally applicable to both the singular and plural forms of such terms. All matters to be agreed to by any party hereto must be agreed to in writing by such party unless otherwise indicated herein. References to agreements, policies, standards, guidelines or instruments, or to statutes or regulations, are to such agreements, policies, standards, guidelines or instruments, or statutes or regulations, as amended or supplemented from time to time (or to successors thereto).

8.3 Notices. Any notices or other communications required or permitted to be given hereunder shall be in writing and shall be deemed to be given (a) when delivered if personally delivered to the party for whom it is intended, (b) when delivered, if sent by electronic mail or facsimile with receipt confirmed during normal business hours of the recipient, and if not sent during normal business hours, then on the recipient’s next business day, (c) three (3) days after having been sent by certified or registered mail, return-receipt requested and postage prepaid, or (d) one (1) business day after deposit with a nationally recognized overnight courier, freight prepaid, specifying next business day delivery, with written verification of receipt:

(a) If to the Company, addressed as follows:

Whitehawk Therapeutics, Inc.

▇ ▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇

Morristown, NJ 07960

Attention: ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, Ph.D., Chief Executive Officer

Email:

with a copy (which shall not constitute notice):

Whitehawk Therapeutics, Inc.

▇ ▇▇▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇ ▇▇▇▇▇

Morristown, NJ 07960

Attention: ▇▇▇▇▇▇▇ ▇▇▇▇▇, General Counsel

Email:

with a copy to (which shall not constitute notice):

▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, P.C.

▇▇▇▇▇ ▇▇ ▇▇▇▇▇▇ ▇▇▇▇

San Diego, CA 92130

Attention: ▇▇▇ ▇▇▇▇▇▇▇

Email:

(b) If to any Purchaser, at its address set forth on Exhibit A or to such e-mail address, facsimile number or address as subsequently modified by written notice given in accordance with this Section 8.3.

Any Person may change the address to which notices and communications to it are to be addressed by notification as provided for herein.

8.4 Severability. If any part or provision of this Agreement is held unenforceable or in conflict with the applicable laws or regulations of any jurisdiction, the invalid or unenforceable part or provisions shall be replaced with a provision which accomplishes, to the extent possible, the original business purpose of such part or provision in a valid and enforceable manner, and the remainder of this Agreement shall remain binding upon the parties hereto.

8.5 Governing Law; Submission to Jurisdiction; Venue; Waiver of Trial by Jury.

(a) This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York without regard to choice of laws or conflicts of laws provisions thereof that would require the application of the laws of any other jurisdiction, except to the extent that mandatory principles of Delaware law may apply.

(b) The Company and each of the Purchasers hereby irrevocably and unconditionally:

(i) submits for itself and its property in any legal action or proceeding relating solely to this Agreement or the transactions contemplated hereby, to the general jurisdiction of the any state court or United States Federal court sitting in the City of New York in the State of New York;

(ii) consents that any such action or proceeding may be brought in such courts, and waives any objection that it may now or hereafter have to the venue of any such action or proceeding in any such court or that such action or proceeding was brought in an inconvenient court and agrees not to plead or claim the same to the extent permitted by applicable law;

(iii) agrees that service of process in any such action or proceeding may be effected by mailing a copy thereof by registered or certified mail (or any substantially similar form of mail), postage prepaid, to the party, as the case may be, at its address set forth in Section 8.3 or at such other address of which the other party shall have been notified pursuant thereto;

(iv) agrees that nothing herein shall affect the right to effect service of process in any other manner permitted by law or shall limit the right to sue in any other jurisdiction for recognition and enforcement of any judgment or if jurisdiction in the courts referenced in the foregoing clause (i) are not available despite the intentions of the parties hereto;

(v) agrees that final judgment in any such suit, action or proceeding brought in such a court may be enforced in the courts of any jurisdiction to which such party is subject by a suit upon such judgment, provided that service of process is effected upon such party in the manner specified herein or as otherwise permitted by law;

(vi) agrees that to the extent that such party has or hereafter may acquire any immunity from jurisdiction of any court or from any legal process with respect to itself or its property, such party hereby irrevocably waives such immunity in respect of its obligations under this Agreement, to the extent permitted by law; and

(vii) irrevocably and unconditionally waives trial by jury in any legal action or proceeding in relation to this Agreement.

8.6 Waiver. No waiver of any term, provision or condition of this Agreement, whether by conduct or otherwise, in any one or more instances, shall be deemed to be, or be construed as, a further or continuing waiver of any such term, provision or condition or as a waiver of any other term, provision or condition of this Agreement.

8.7 Expenses. Each party shall pay its own out-of-pocket fees and expenses, including the fees and expenses of attorneys, accountants and consultants employed by such party, incurred in connection with the proposed investment in the Securities, the negotiation of the Transaction Agreements and the consummation of the transactions contemplated thereby.

8.8 Assignment. None of the parties may assign its rights or obligations under this Agreement or designate another person (i) to perform all or part of its obligations under this Agreement or (ii) to have all or part of its rights and benefits under this Agreement, in each case without the prior written consent of (x) the Company, in the case of a Purchaser, and (y) the Purchasers, in the case of the Company, provided that a Purchaser may, without the prior consent of the Company, assign its rights to purchase the Securities hereunder to any of its affiliates or to any other investment funds or accounts managed or advised by the investment manager who acts on behalf of such Purchaser (provided each such assignee agrees to be bound by the terms of this Agreement and makes the same representations and warranties set forth in Section 4 hereof). In the event of any assignment in accordance with the terms of this Agreement, the assignee shall specifically assume and be bound by the provisions of this Agreement by executing a writing agreeing to be bound by and subject to the provisions of this Agreement and shall deliver an executed counterpart signature page to this Agreement and, notwithstanding such assumption or agreement to be bound hereby by an assignee, no such assignment shall relieve any party assigning any interest hereunder from its obligations or liability pursuant to this Agreement.

8.9 Confidential Information.

(a) Each Purchaser covenants that until such time as the transactions contemplated by this Agreement are publicly disclosed by the Company, such Purchaser will maintain the confidentiality of all disclosures made to it in connection with this transaction (including the existence and terms of this transaction), other than to such Purchaser’s outside attorney, accountant, auditor or investment advisor only to the extent necessary to permit evaluation of the investment, and the performance of the necessary or required tax, accounting, financial, legal, or administrative tasks and services and other than as may be required by law.

(b) The Company may request from the Purchasers such additional information as the Company may deem necessary to evaluate the eligibility of the Purchaser to acquire the Securities, and the Purchaser shall promptly provide such information as may reasonably be requested to the extent readily available; provided, that the Company agrees to keep any such information provided by the Purchaser confidential, except (i) as required by the federal securities laws, rules or regulations and (ii) to the extent such disclosure is required by other laws, rules or regulations, at the request of the staff of the SEC or regulatory agency or under the regulations of Nasdaq. The Purchaser acknowledges that the Company may file a copy of this Agreement and the Registration Rights Agreement with the SEC as exhibits to a periodic report or a registration statement of the Company.

8.10 Third Parties. Nothing in this Agreement, express or implied, is intended to confer on any Person other than the parties to this Agreement any rights, remedies, claims, benefits, obligations or liabilities under or by reason of this Agreement, and no Person that is not a party to this Agreement (including, without limitation, any partner, member, shareholder, director, officer, employee or other beneficial owner of any party to this Agreement, in its own capacity as such or in bringing a derivative action on behalf of a party to this Agreement) shall have any standing as a third party beneficiary with respect to this Agreement or the transactions contemplated hereby, except as set forth in Section 5.10. Notwithstanding the foregoing, each of the Placement Agents is an intended third-party beneficiary of the representations and warranties of the Company and of each Purchaser set forth in Section 3, Section 4 and Section 6.1(j) and Section 8.17 of this Agreement and this Section 8.10.

8.11 Independent Nature of Purchasers’ Obligations and Right. The obligations of each Purchaser under this Agreement are several and not joint with the obligations of any other Purchaser, and no Purchaser shall be responsible in any way for the performance obligations of any other Purchaser under this Agreement. Nothing contained herein, and no action taken by any Purchaser pursuant hereto, shall be deemed to constitute the Purchasers as, and the Company acknowledges that the Purchasers do not so constitute, a partnership, an association, a joint venture or any other kind of entity, or create a presumption that the Purchasers are in any way acting in concert or as a group, and the Company will not assert any such claim with respect to such obligations or the transactions contemplated by this Agreement and the Company acknowledges that the Purchasers are not acting in concert or as a group with respect to such obligations or the transactions contemplated by this Agreement. The Company acknowledges and each Purchaser confirms that it has independently participated in the negotiation of the transaction contemplated hereby with the advice of its own counsel and advisors. Each Purchaser also acknowledges that ▇▇▇▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇ & ▇▇▇▇▇▇, P.C. has rendered legal advice to the Company and not such Purchaser. Each Purchaser shall be entitled to independently protect and enforce its rights, including, without limitation, the rights arising out of this Agreement, and it shall not be necessary for any other Purchaser to be joined as an additional party in any proceeding for such purpose. For reasons of administrative convenience only, certain Purchasers and their respective counsels have chosen to communicate with the Company through ▇▇▇▇▇▇ LLP, counsel to the Placement Agents. Each such Purchaser acknowledges that ▇▇▇▇▇▇ LLP has rendered legal advice to the Placement Agents and not to such Purchaser in connection with the transactions contemplated hereby, and that each such Purchaser has relied for such matters on the advice of its own respective counsel. The Company has elected to provide all Purchasers with the same terms and Transaction Agreements for the convenience of the Company and not because it was required or requested to do so by any Purchaser.

8.12 Counterparts. This Agreement may be signed in any number of counterparts, each of which shall be an original, but all of which together shall constitute one instrument.

8.13 Entire Agreement; Amendments. This Agreement and the other Transaction Agreements constitute the entire agreement between the parties hereto respecting the subject matter hereof and supersedes all prior agreements, negotiations, understandings, representations and statements respecting the subject matter hereof, whether written or oral. No modification, alteration, or change in any of the terms of this Agreement shall be valid or binding upon the parties hereto unless made in writing and duly executed by the Company and the Purchasers of at least a majority in interest of the Securities then held by the Purchasers. Notwithstanding the foregoing, this Agreement may not be amended and the observance of any term of this Agreement may not be waived with respect to any Purchaser without the written consent of such Purchaser unless such amendment or waiver applies to all Purchasers in the same fashion and provided that the consent of each Purchaser is required for any amendment to Section 5.10 and for the waiver of any of the conditions set forth in Section 6.1(d), 6.1(f), or 6.1(k). The Company, on the one hand, and each Purchaser, on the other hand, may by an instrument signed in writing by such parties waive the performance, compliance or satisfaction by such Purchaser or the Company, respectively, with any term or provision hereof or any condition hereto to be performed, complied with or satisfied by such Purchaser or the Company, respectively.

8.14 Survival. The covenants, representations and warranties made by each party hereto contained in this Agreement shall survive the Closing and the delivery of the Shares in accordance with their respective terms. Each Purchaser shall be responsible only for its own representations, warranties, agreements and covenants hereunder.

8.15 Mutual Drafting. This Agreement is the joint product of each Purchaser and the Company and each provision hereof has been subject to the mutual consultation, negotiation and agreement of such parties and shall not be construed for or against any party hereto.

8.16 Additional Matters. For the avoidance of doubt, the parties acknowledge and confirm that the terms and conditions of the Securities were determined as a result of arm’s-length negotiations.

8.17 Reliance by and Exculpation of the Placement Agents.

(a) Each Purchaser agrees and acknowledges that it has read the notice attached hereto as Exhibit D and hereto agrees for the express benefit of the Placement Agents, their respective affiliates and their respective representatives that (i) the Placement Agents, their respective affiliates and their respective representatives have not made, and will not make, any representations or warranties with respect to the Company or the offer and sale of the Securities, and such Purchaser will not rely on any statements made by the Placement Agents, orally or in writing, to the contrary, (ii) such Purchaser will be responsible for conducting its own due diligence investigation with respect to the Company and the offer and sale of the Securities, (iii) such Purchaser will be purchasing Securities based on the results of its own due diligence investigation of the Company, and the Placement Agents and each of their respective directors, officers, employees, representatives, and controlling persons have made no independent investigation with

respect to the Company, the Securities, or the accuracy, completeness, or adequacy of any information supplied to the Purchaser by the Company, (iv) such Purchaser has negotiated the offer and sale of the Securities directly with the Company, and such Placement Agents will not be responsible for the ultimate success of any such investment, and (v) the decision to invest in the Company will involve a significant degree of risk, including a risk of total loss of such investment. Each Purchaser further represents and warrants to the Placement Agents that it, including any fund or funds that it manages or advises that participates in the offer and sale of the Securities, is permitted under its constitutive documents (including, without limitation, all limited partnership agreements, charters, bylaws, limited liability company agreements, all applicable side letters with investors, and similar documents) to make investments of the type contemplated by this Agreement. This Section 8.17 shall survive any termination of this Agreement.

(b) The Company agrees and acknowledges that the Placement Agents may rely on their respective representations, warranties, agreements and covenants contained in this Agreement and each Purchaser agrees that the Placement Agents may rely on such Purchaser’s representations and warranties contained in this Agreement as if such representations and warranties, as applicable, were made directly to the Placement Agents.

(c) Neither the Placement Agents nor any of their respective affiliates or representatives (1) shall be liable for any improper payment made in accordance with the information provided by the Company; (2) makes any representation or warranty, or has any responsibilities as to the validity, accuracy, value or genuineness of any information, certificates or documentation delivered by or on behalf of the Company pursuant to the Transaction Agreements or in connection with any of the transactions contemplated therein; or (3) shall be liable (x) for any action taken, suffered or omitted by any of them in good faith and reasonably believed to be authorized or within the discretion or rights or powers conferred upon it by the Transaction Agreements or (y) for anything which any of them may do or refrain from doing in connection with the Transaction Agreements, except in each case for such party’s own gross negligence, willful misconduct or bad faith.

(d) The Company agrees that the Placement Agents, their respective affiliates and representatives shall be entitled to (1) rely on, and shall be protected in acting upon, any certificate, instrument, notice, letter or any other document or security delivered to any of them by or on behalf of the Company, and (2) be indemnified by the Company for acting as a Placement Agent hereunder pursuant to the indemnification provisions set forth in the engagement letter between the Company and the Placement Agents.

[Remainder of Page Intentionally Left Blank.]

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


COMPANY:

WHITEHAWK THERAPEUTICS, INC.

By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, Ph.D.
		Name: ▇▇▇▇▇ ▇. ▇▇▇▇▇▇, Ph.D.
		Title: President and Chief Executive Officer

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

COASTLANDS CAPITAL PARTNERS LP

By:		/s/ ▇▇▇▇ ▇▇▇▇▇▇
Name:		▇▇▇▇ ▇▇▇▇▇▇
Title:		CFO

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

QVT Family Office Fund LP
By its general partner, QVT Associates GP LLC

By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
Title:		Authorized Signatory

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

Avoro Life Sciences Fund LLC

By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇
Name:		▇▇▇▇▇ ▇▇▇▇▇▇▇
Title:		Partner, COO & CCO

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

AVICENNA LIFE SCI MASTER FUND LP

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇
Title:		CFO of the General Partner

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

INVUS PUBLIC EQUITIES, L.P.

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇
Title:		CFO of the General Partner

[Signature Page to Securities Purchase Agreement]

IN WITNESS WHEREOF, the parties have executed this Agreement or caused their duly authorized officers to execute this Agreement as of the day and year first written above.


PURCHASER:

Stem Point Capital Master Fund LP

By:		/s/ ▇▇▇▇ ▇. ▇▇▇
Name:		▇▇▇▇ ▇. ▇▇▇
Title:		President and Managing Partner

[Signature Page to Registration Rights Agreement]

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

PURCHASER:


Acuta Capital Fund, LP

By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇
Name: ▇▇▇▇▇ ▇. ▇▇▇▇▇
Title: Chief Operating Officer

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

PURCHASER:


Acuta Opportunity Fund, LP

By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇
Name: ▇▇▇▇▇ ▇. ▇▇▇▇▇
Title: Chief Operating Officer

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇▇▇ ▇▇▇

By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Title:		Individual

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇ ▇. ▇▇▇▇▇▇

By:		/s/ ▇▇▇▇▇ ▇. ▇▇▇▇▇▇
Name:		▇▇▇▇▇ ▇. ▇▇▇▇▇▇

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇

By:		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇ ▇▇▇▇

By:		/s/ ▇▇▇▇▇ ▇▇▇▇
Name:		▇▇▇▇▇ ▇▇▇▇

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

KVP Capital, LP

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇
Title:		Member of KVP Capital, GP, LLC
		its General Partner

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

ADAR1 Partners, LP

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇▇▇▇
Title:		Manager of General Partner

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

Spearhead Insurance Solutions IDF, LLC – Series ADAR1

By:		/s/ ▇▇▇ ▇▇▇▇▇
Name:		▇▇▇ ▇▇▇▇▇
Title:		Manager

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇▇▇ MASTER FUND, LTD.

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Title:		Authorized Signatory

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇▇▇ ▇▇▇▇▇▇▇ MASTER FUND, LTD.

By:		/s/ ▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Name:		▇▇▇▇▇▇ ▇▇▇▇▇▇▇▇▇
Title:		Authorized Signatory

[Signature Page to Securities Purchase Agreement]

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


PURCHASER:

▇▇▇▇▇▇▇▇ ▇▇▇▇▇

By:		/s/ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇
Name:		▇▇▇▇▇▇▇▇ ▇▇▇▇▇

[Signature Page to Securities Purchase Agreement]

EXHIBIT A

PURCHASERS

Purchaser Name

Shares

Warrant Shares

Subscription Amount

TOTAL:

A-1

EXHIBIT B

FORM OF PRE-FUNDED WARRANT

[Filed Separately]

B-1

EXHIBIT C

FORM OF REGISTRATION RIGHTS AGREEMENT

[Filed separately]

C-1

EXHIBIT ▇

▇▇▇▇▇▇▇▇▇ REQUIRED DISCLOSURE

On September 27, 2022, pursuant to an offer of settlement by Jefferies, the SEC entered an administrative order, pursuant to its Broker-Dealer Off-Channel Communications initiative, finding that ▇▇▇▇▇▇▇▇▇ violated Section 17(a) of the Exchange Act and Rule 17a-4(b)(4) thereunder for its failure to comply with the recordkeeping requirements on broker-dealers. The administrative order requires ▇▇▇▇▇▇▇▇▇ to cease and desist from committing or causing any violations or any future violations of Section 17(a) of the Exchange Act and Rule 17a-4 thereunder, to pay a civil penalty, and to complete certain undertakings. ▇▇▇▇▇▇▇▇▇ received waivers from the SEC of any disqualifications under Regulations A (Rule 262), D (Rule 506), E (Rule 602) and Crowdfunding (Rule 503) of the Securities Act arising from the settlement, effective as of September 27, 2022. The SEC orders are available at 34-95923.pdf (▇▇▇.▇▇▇) and 33-11109.pdf (▇▇▇.▇▇▇).

D-1

EXHIBIT E

FORM OF LOCK-UP AGREEMENT

E-1

Form of Lock-up Agreement

May [•], 2026

▇▇▇▇▇▇▇▇▇ LLC

Leerink Partners LLC

▇▇▇▇▇▇▇▇▇▇▇ & Co. Inc.

Citizens JMP Securities, LLC

JonesTrading Institutional Services LLC

As Placement Agents

c/▇ ▇▇▇▇▇▇▇▇▇ LLC

▇▇▇ ▇▇▇▇▇▇▇ ▇▇▇▇▇▇

New York, New York 10022

c/o Leerink Partners LLC

▇▇▇▇ ▇▇▇▇▇▇ ▇▇ ▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇

New York, New York 10019

c/o Oppenheimer & Co. Inc.

▇▇ ▇▇▇▇▇ ▇▇▇▇▇▇

New York, New York 10004

c/o Citizens JMP Securities, LLC

▇▇▇ ▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇

New York, New York 10022

JonesTrading Institutional Services LLC

▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇

New York, New York 10013

RE: Whitehawk Therapeutics, Inc. (the “Company”)

Ladies & Gentlemen:

The undersigned is an owner of shares of common stock, par value $0.0001 per share, of the Company (“Shares”) or of securities convertible into or exchangeable or exercisable for Shares. The Company proposes to conduct a private placement of securities of the Company (the “Private Placement”) for which ▇▇▇▇▇▇▇▇▇ LLC (“▇▇▇▇▇▇▇▇▇”), Leerink Partners LLC (“Leerink”), ▇▇▇▇▇▇▇▇▇▇▇ & Co. Inc. (“▇▇▇▇▇▇▇▇▇▇▇”), Citizens JMP Securities, LLC (“Citizens”) and JonesTrading Institutional Services LLC (“▇▇▇▇▇”) will act as the placement agents (the “Placement Agents”). The undersigned recognizes that the Private Placement will benefit each of the Company and the undersigned. The undersigned acknowledges that the Placement Agents are relying on the representations and agreements of the undersigned contained in this letter agreement in conducting the Private Placement and other arrangements with the Company with respect to the Private Placement.

Annex A sets forth definitions for capitalized terms used in this letter agreement that are not defined in the body of this letter agreement. Those definitions are a part of this letter agreement.

In consideration of the foregoing, and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the undersigned hereby agrees that, during the Lock-up Period, the undersigned will not (and, if the undersigned is a natural person, will cause any Family Member not to), without the prior written consent of ▇▇▇▇▇▇▇▇▇ LLC and Leerink Partners LLC, which may withhold their consent in their sole discretion:

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Sell or Offer to Sell any Shares or Related Securities currently or hereafter owned either of record or beneficially (as defined in Rule 13d-3 under the Exchange Act) by the undersigned or such Family Member,

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enter into any Swap,

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make any demand for, or exercise any right with respect to, the registration under the Securities Act of the offer and sale of any Shares or Related Securities, or cause to be filed a registration statement, prospectus or prospectus supplement (or an amendment or supplement thereto) with respect to any such registration, or

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publicly announce any intention to do any of the foregoing.

The foregoing will not apply to (i) the offer and sale of Shares and Related Securities pursuant to the Private Placement or (ii) the inclusion of any Shares (including Shares subject to Related Securities) purchased in the Private Placement in the registration statement that is contemplated to be filed with the SEC by the Company to register the resale of the Shares (including Shares subject to Related Securities) purchased in the Private Placement (the “Resale Registration Statement”), provided that any such Shares may not be sold pursuant to the Resale Registration Statement during the Lock-up Period. In addition, the foregoing restrictions will not apply to the transfer of Shares or Related Securities:

as a bona fide gift or gifts,

ii.

by will or intestacy,

iii.

to any trust or other entities formed for the direct or indirect benefit of the undersigned or a Family Member of the undersigned,

iv.

to any Family Member,

if the undersigned is a trust, to a trustor, trustee or beneficiary of the trust or to the estate of a beneficiary of such trust,

vi.

to a corporation, partnership, limited liability company or other entity of which the undersigned or any Family Member is the legal and beneficial owner of all of the outstanding equity securities or similar interests,

vii.

if the undersigned is a corporation, partnership, limited liability company, trust or other business entity, (A) to another corporation, partnership, limited liability company, trust or other business entity that is an affiliate (as defined in Rule 405 promulgated under the Securities Act) of the undersigned (including, for the avoidance of doubt, any wholly-owned direct or indirect subsidiary of the undersigned or to the immediate or indirect parent entity of the undersigned), or to any investment fund or other entity controlling, controlled by, managing or managed by or under common control with the undersigned (including, for the avoidance of doubt, where the undersigned is a partnership, to its general partner or a successor partnership or fund, or any other funds managed by such partnership), or (B) as part of a distribution, transfer or other disposition by the undersigned to its stockholders, partners, members or other equity holders,

viii.

that the undersigned may purchase in open market transactions after the completion of the Private Placement;

ix.

by operation of law pursuant to a court order or settlement agreement related to the distribution of assets in connection with the dissolution of a marriage or civil union, provided that such Shares or Related Securities shall remain subject to the terms of this letter agreement,

in connection with the exercise or settlement on a cash basis of options or restricted stock units granted under a stock incentive plan or other equity award plan, which plan is described in the Company’s filings with the SEC, provided that any Shares or Related Securities received as a result of such exercise, vesting or settlement shall remain subject to the terms of this letter agreement,

xi.

to the Company (A) in connection with the “net” or “cashless” exercise of options or other rights to purchase Shares or Related Securities from the Company (including any transfer to the Company for the payment of tax withholdings or remittance payments due as a result of such exercise), which options or rights are described in the Company’s filings with the SEC, and (B) in connection with the vesting or settlement of restricted stock units, for the payment of tax withholdings or remittance payments due as a result of the vesting or settlement of such restricted stock units, in all such cases, pursuant to equity awards granted under a stock incentive plan or other equity award plan, which plan is described in the Company’s filings with the SEC, provided that any Shares or Related Securities received as a result of such exercise, vesting or settlement shall remain subject to the terms of this letter agreement, and

xii.

pursuant to a bona fide third-party tender offer, merger, consolidation or other similar transaction that is approved by the Board of Directors of the Company and made to all holders of the Company’s capital stock involving a Change of Control of the Company, provided that in the event that such tender offer, merger, consolidation or other similar transaction is not completed, the undersigned’s Shares and Related Securities shall remain subject to the provisions of this letter agreement,

provided, however, that in any such case, it shall be a condition to such transfer that:

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in the case of any transfer pursuant to clauses (i) through (vii) and (ix) above, each transferee executes and delivers to the Placement Agents a lock-up letter in the form of this letter agreement,

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in the case of any transfer pursuant to clauses (i) through (viii) above, no public disclosure or filing shall be required, or made voluntarily, during the Lock-up Period reporting a reduction in beneficial ownership of Shares in connection with such transfer,

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in the case of any transfer pursuant to clauses (ix), (x) and (xi) above, no public disclosure or filing reporting a change in beneficial ownership of Shares or Related Securities shall be made voluntarily during the Lock-up Period, and if the undersigned is required to file a report under Section 16 of the Exchange Act reporting a change in beneficial ownership of Shares or Related Securities during the Lock-up Period, the undersigned shall include a statement in such report to the effect that such transfer relates to the circumstances described in clause (ix), (x) or (xi), as applicable, and

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in the case of any transfer pursuant to clauses (i) through (vii) above, such transfer shall not involve a disposition for value.

Furthermore, notwithstanding the restrictions imposed by this letter agreement, the undersigned may establish a trading plan pursuant to Rule 10b5-1 under the Exchange Act for the transfer of Shares or Related Securities, provided that such plan does not provide for any transfers of Shares or Related Securities during the Lock-up Period and the entry into such plan is not publicly disclosed, including in any filing under the Exchange Act, during the Lock-up Period.

Moreover, notwithstanding the restrictions imposed by this letter agreement, the undersigned may demand for, or exercise any right with respect to, the registration under the Securities Act of the offer and sale of any Shares or Related Securities held by the undersigned, or cause to be filed a registration statement, prospectus or prospectus supplement (or an amendment or supplement thereto) with respect to any such registration; provided, that (i) the Resale Registration Statement (as defined below) shall have first been filed and declared effective by the SEC and (ii) no Shares or Related Securities shall be sold under any such registration during the Lock-up Period.

The undersigned also agrees and consents to the entry of stop transfer instructions with the Company’s transfer agent and registrar against the transfer of Shares or Related Securities held by the undersigned and, if the undersigned is a natural person, the undersigned’s Family Members, if any, except in compliance with the foregoing restrictions.

The undersigned confirms that the undersigned has not, and has no knowledge that any Family Member

has, directly or indirectly, taken any action designed to or that might reasonably be expected to cause or result in the stabilization or manipulation of the price of any security of the Company to facilitate the sale of the Shares. The undersigned will not, and will cause any Family Member not to take, directly or indirectly, any such action.

The undersigned acknowledges and agrees that the Placement Agents have not provided any recommendation or investment advice nor have the Placement Agents solicited any action from the undersigned with respect to the Private Placement and the undersigned has consulted their own legal, accounting, financial, regulatory and tax advisors to the extent deemed appropriate. The undersigned further acknowledges and agrees that, although the Placement Agents may be required or choose to provide certain Regulation Best Interest and Form CRS disclosures to the undersigned in connection with the Private Placement, the Placement Agents are not making a recommendation to the undersigned to enter into this letter agreement and nothing set forth in such disclosures is intended to suggest that the Placement Agents are making such a recommendation.

Whether or not the Private Placement occurs as currently contemplated or at all depends on market conditions and other factors. The Private Placement will only be made pursuant to the Subscription Agreement. Notwithstanding anything to the contrary contained herein, this letter agreement will automatically terminate and the undersigned shall be released from all obligations under this letter agreement upon the earliest to occur, if any, of (i) the Company advising the Placement Agents in writing prior to the Private Placement that it has determined not to proceed with the Private Placement or (ii) May 31, 2026, in the event the Private Placement has not been conducted by such date.

The undersigned hereby represents and warrants that the undersigned has full power, capacity and authority to enter into this letter agreement. This letter agreement is irrevocable and will be binding on the undersigned and the successors, heirs, personal representatives and assigns of the undersigned. This letter agreement may be delivered via facsimile, electronic mail (including pdf or any electronic signature complying with the U.S. federal ESIGN Act of 2000, e.g., ▇▇▇.▇▇▇▇▇▇▇▇.▇▇▇ or ▇▇▇.▇▇▇▇▇▇▇▇.▇▇▇) or other transmission method and any counterpart so delivered shall be deemed to have been duly and validly delivered and be valid and effective for all purposes.

This letter agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

[Signature page follows]


Very truly yours,

Name of Security Holder (Print exact name)

By:
		Signature

If not signing in an individual capacity:


Name of Authorized Signatory (Print)

Title of Authorized Signatory (Print)

(indicate capacity of person signing if signing as custodian, trustee, or on behalf of an entity)

[Signature Page to Lock-up Agreement]

Certain Defined Terms

Used in Lock-up Agreement

For purposes of the letter agreement to which this Annex A is attached and of which it is made a part:

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“Call Equivalent Position” shall have the meaning set forth in Rule 16a-1(b) under the Exchange Act.

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“Change of Control” means the consummation of any bona fide third party tender offer, merger, consolidation or other similar transaction following the completion of the Private Placement and approved by the Board of Directors of the Company, the result of which is that any “person” (as defined in Section 13(d)(3) of the Exchange Act), or group of persons, other than the Company or its subsidiaries, becomes the beneficial owner (as defined in Rules 13d-3 and 13d-5 of the Exchange Act) of more than 50% of the total voting power of the voting stock of the Company.

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

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“Family Member” shall mean the spouse of the undersigned, an immediate family member of the undersigned or an immediate family member of the undersigned’s spouse, in each case living in the undersigned’s household or whose principal residence is the undersigned’s household (regardless of whether such spouse or family member may at the time be living elsewhere due to educational activities, health care treatment, military service, temporary internship or employment or otherwise). “Immediate family member” as used above shall have the meaning set forth in Rule 16a-1(e) under the Exchange Act.

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“Lock-up Period” shall mean the period beginning on the date hereof and continuing through the close of trading on the date that is 60 days after the closing of the Private Placement.

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“Put Equivalent Position” shall have the meaning set forth in Rule 16a-1(h) under the Exchange Act.

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“Related Securities” shall mean any options or warrants or other rights to acquire Shares or any securities exchangeable or exercisable for or convertible into Shares, or to acquire other securities or rights ultimately exchangeable or exercisable for or convertible into Shares.

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

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“Sell or Offer to Sell” shall mean to:

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sell, offer to sell, contract to sell or lend,

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effect any short sale or establish or increase a Put Equivalent Position or liquidate or decrease any Call Equivalent Position

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pledge, hypothecate or grant any security interest in, or

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in any other way transfer or dispose of,

in each case whether effected directly or indirectly.

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“Subscription Agreement” shall mean the definitive subscription agreement entered into in connection with the Private Placement.

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“Swap” shall mean any swap, hedge or similar arrangement or agreement that transfers, in whole or in part, the economic risk of ownership of Shares or Related Securities, regardless of whether any such transaction is to be settled in securities, in cash or otherwise.

Capitalized terms not defined in this Annex A shall have the meanings given to them in the body of this lock-up agreement.

SECURITIES PURCHASE AGREEMENT BY AND AMONG WHITEHAWK THERAPEUTICS, INC., AND THE PURCHASERS May 12, 2026

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