Company: WHWK
Filing Date: 2025-01-31
Form Type: DEFM14A
Source: 0001193125-25-018470
Chunk: 685

Company: Whitehawk Therapeutics, Inc.
Filing Date: 2025-01-31
Form: DEFM14A
Chunk 685
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ation and intending legally to be bound, the receipt and adequacy of which are hereby acknowledged, the parties to this Agreement agree as follows:

SECTION 1 . All capitalized terms that are used but not defined herein shall have the respective meanings
ascribed to them in the Stock Purchase Agreement. For all purposes of and under this Agreement, the following terms shall have the following respective meanings:

(a) “Beneficially Own” and “Beneficial Ownership” have the meanings assigned to such terms in
Rule 13d-3 under the Exchange Act, and a Person’s Beneficial Ownership of securities shall be calculated in accordance with the provisions of such rule (in each case, irrespective of whether such rule
actually is applicable in such circumstance). For the avoidance of doubt, “Beneficially Own” and “Beneficial Ownership” shall include record ownership of securities.

(b) “Beneficial Owner” of securities shall mean a Person who Beneficially Owns such securities.

(c) “Encumbrance” shall mean any lien, encumbrance, mortgage, deed of trust, claim, lease, easement,
servitude, transfer restriction, hypothecation, charge, security interest, pledge or option, proxy, right of first refusal, voting trust or any other similar right.

(d) “Expiration Time” shall mean the earliest to occur of the following: (i) such date and time as the
Stock Purchase Agreement shall have been validly terminated pursuant to Article VIII thereof; (ii) the Closing; or (iii) the termination of this Agreement by mutual written consent of the parties hereto.

B-1

(e) “Permitted Encumbrance” shall mean any Encumbrance
arising under the U.S. securities laws, Seller’s organizational or governing documents or customary custody arrangements with brokerage accounts or this Agreement and any other Encumbrance that would not prevent or delay or impair the
consummation by Stockholder of the transactions contemplated by this Agreement or Stockholder’s ability to perform Stockholder’s obligations hereunder.

(f) “Subject Shares” shall mean (i) all shares of Seller Common Stock Beneficially Owned by Stockholder
as of the date hereof and (ii) all additional shares of Seller Common Stock of which Stockholder acquires Beneficial Ownership at any time during the Support Period (including by way of stock dividend or distribution, split-up, recapitalization, combination, exchange of shares or issued upon the exercise of any options, the settlement of any