EXHIBIT F
June 29, 2000
XXXXXXX XXXXX & CO.
Xxxxxxx Lynch, Xxxxxx, Xxxxxx & Xxxxx
Incorporated,
Xxxxxxx, Xxxxx & Co.
X.X. Xxxxxx Securities Inc.
Xxxxxxx Xxxxx Xxxxxx Inc.
Xxxxxx Xxxxxxx & Co., Inc.
as Representatives of the several
Underwriters to be named in the
within-mentioned Purchase Agreement
c/x Xxxxxxx Xxxxx & Co.
Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx
Incorporated
North Tower
World Financial Center
New York, New York 10281-1209
Re: Proposed Public Offering by Syntroleum Corporation
Dear Sirs:
The undersigned, a stockholder and an officer and director of Syntroleum
Corporation, a Delaware corporation (the "Company"), understands that Xxxxxxx
Xxxxx & Co., Xxxxxxx Lynch, Pierce, Xxxxxx & Xxxxx Incorporated ("Xxxxxxx
Xxxxx"), Xxxxxxx, Xxxxx & Co., X.X. Xxxxxx Securities Inc., Xxxxxxx Xxxxx Xxxxxx
Inc. and Xxxxxx Xxxxxxx & Co., Inc. propose to enter into a Purchase Agreement
(the "Purchase Agreement") with the Company providing for the public offering of
shares (the "Securities") of the Company's common stock, par value $0.01 per
share (the "Common Stock"). In recognition of the benefit that such an offering
will confer upon the undersigned as a stockholder and an officer and director of
the Company, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the undersigned agrees with each
underwriter to be named in the Purchase Agreement that, during a period of 180
days from the date of the Purchase Agreement, the undersigned will not, without
the prior written consent of Xxxxxxx Xxxxx, directly or indirectly, (i) offer,
pledge, sell, contract to sell, sell any option or contract to purchase,
purchase any option or contract to sell, grant any option, right or warrant for
the sale of, or otherwise dispose of or transfer any shares of the Company's
Common Stock or any securities convertible into or exchangeable or exercisable
for Common Stock, whether now owned or hereafter acquired by the undersigned or
with respect to which the undersigned has or hereafter acquires the power of
disposition, or file any registration statement under the Securities Act of
1933, as amended, with respect to any of the foregoing or (ii) enter into any
swap or any other agreement or any transaction that transfers, in whole or in
part, directly or indirectly, the economic consequence of ownership of the
Common Stock, whether any such swap or transaction is to be settled by delivery
of Common Stock or other
securities, in cash or otherwise; provided that the foregoing restriction shall
not apply to (i) bona fide pledges of securities existing on the date of this
letter and (ii) intra-family transfers or transfers to trusts for estate
planning purposes if the transferee of such securities agrees in writing to be
bound by the restrictions contained in this letter with respect to such
securities.
Very truly yours,
/s/ Xxxx X. Xxxx
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Xxxx X. Xxxx
