David James Lennon - 01 Mar 2026 Form 4 Insider Report for Whitehawk Therapeutics, Inc. (WHWK)

Role: CHIEF EXECUTIVE OFFICER, Director
Signature: /s/ Stephen Rodin, as Attorney-in-Fact
Issuer symbol: WHWK
Transactions as of: 01 Mar 2026
Net transactions value: -$16,879
Form type: 4
Filing time: 10 Mar 2026, 19:36:53 UTC
Previous filing: 03 Apr 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lennon David James	CHIEF EXECUTIVE OFFICER, Director	C/O WHITEHAWK THERAPEUTICS, INC., 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T, MORRISTOWN	/s/ Stephen Rodin, as Attorney-in-Fact	10 Mar 2026	0001995275

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	WHWK	Common Stock	Options Exercise		+16,250	+49%		49,679	01 Mar 2026	Direct	F1
transaction	WHWK	Common Stock	Sale	$16,879	-5,100	-10%	$3.31	44,579	02 Mar 2026	Direct	F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	WHWK	Restricted Stock Units	Options Exercise		-16,250	-33%	$0.000000^*	32,500	01 Mar 2026	Common Stock	16,250		Direct	F1, F3

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Each restricted stock unit ("RSU") represents a contingent right to receive one share of Whitehawk Therapeutics, Inc. Common Stock.
F2	Represents a broker-assisted sale to satisfy the Reporting Person's tax withholding obligations in connection with the vesting of restricted stock units.
F3	Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2021 Equity Incentive Plan) through each applicable date, twenty five percent (25%) of the shares subject to the award shall vest on the one-year anniversary of the Vesting Commencement Date, and twenty five percent (25%) of the shares subject to the award shall vest each of the next three Vesting Commencement Date anniversaries thereafter. "Vesting Commencement Date" shall mean March 1, 2024.