Whitehawk CSO granted 85,887 options, 85,887 RSUs

Whitehawk Therapeutics amended a Form 4 to detail new option and RSU grants and correct the vesting terms for its Chief Scientific Officer.

This filing corrects an earlier one, and you can read the original Form 4 if you want to see what changed.

Rhea-AI Filing Summary

Whitehawk Therapeutics, Inc. (WHWK) reported that Chief Scientific Officer David Dornan received equity awards on September 15, 2026. He was granted a stock option for 85,887 shares of common stock at an exercise price of $4.09 per share, expiring on September 15, 2036, vesting 25% after one year from the Vesting Commencement Date and monthly thereafter over four years, subject to continued service. He also received 85,887 restricted stock units, each representing one share of common stock, which will vest 100% on the one-year anniversary of the Vesting Commencement Date, subject to continued service. The amendment corrects the previously reported vesting schedule for the RSU award. No Rule 10b5-1 trading plan is reported.

Insider Trade Summary

Grant/Award: 171,774 shares

Grant/Award 2 txns

Insider Dornan David

Role Chief Scientific Officer

Type	Security	Shares	Price	Value
Grant/Award	Stock Option (right to buy) F1	85,887	$0.00	$0.00
Grant/Award	Restricted Stock Units F2, F3	85,887	$0.00	$0.00

Holdings After Transaction: Stock Option (right to buy) — 85,887 contracts (Direct); Restricted Stock Units — 85,887 contracts (Direct)

Footnotes (3)

1. F1. 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 option shall vest on the one-year anniversary of the Vesting Commencement Date and 1/48th of the total shares subject to the option shall vest every month thereafter such that all shares subject to the option shall be fully vested on the four-year anniversary of the Vesting Commencement Date. "Vesting Commencement Date" shall mean September 15, 2026.
2. F2. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Whitehawk Therapeutics, Inc. Common Stock.
3. F3. The original Form 4 filed by the Reporting Person erroneously reflected an incorrect vesting schedule. Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2021 Equity Incentive Plan) through the applicable date, one hundred percent (100%) of the shares subject to the award shall vest on the one-year anniversary of the Vesting Commencement Date. "Vesting Commencement Date" shall mean September 15, 2026.

Key Figures

Stock options granted: 85,887 shares Option exercise price: $4.09 per share Option expiration date: September 15, 2036 +3 more

6 metrics

Stock options granted 85,887 shares Option grant to Chief Scientific Officer on September 15, 2026

Option exercise price $4.09 per share Exercise price for 85,887 stock options granted September 15, 2026

Option expiration date September 15, 2036 Expiration of stock options granted to Chief Scientific Officer

RSUs granted 85,887 units Restricted Stock Unit award to Chief Scientific Officer on September 15, 2026

Option vesting 25% after 1 year; 1/48 monthly thereafter Vesting schedule for stock options, subject to continued service

RSU vesting 100% after 1 year from Vesting Commencement Date Corrected vesting schedule for RSU award, subject to continued service

Key Terms

Restricted Stock Units, Vesting Commencement Date, Equity Incentive Plan, Service Provider

4 terms

Restricted Stock Units financial

"Each restricted stock unit ("RSU") represents a contingent right to receive"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

Vesting Commencement Date financial

""Vesting Commencement Date" shall mean September 15, 2026."

The vesting commencement date is the starting point when an employee begins earning ownership rights to their promised benefits, such as stock options or retirement contributions. Think of it like the day a savings account is opened—only after this date do the benefits start to grow and become fully available over time. It matters to investors because it marks when the clock begins ticking toward full ownership, affecting the timing and value of these benefits.

Equity Incentive Plan financial

"Service Provider (as defined in the Issuer's 2021 Equity Incentive Plan)"

An equity incentive plan is a program that gives employees, executives or directors the right to receive company stock or options to buy stock as part of their pay. Think of it as offering slices of future company profit to motivate people to boost long‑term performance; for investors it matters because it can align employee goals with shareholder value but also increases the number of shares outstanding, which can dilute existing ownership.

Service Provider financial

"Subject to the Reporting Person continuing to be a Service Provider"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What equity awards did WHWK grant to its Chief Scientific Officer on September 15, 2026?

WHWK granted Chief Scientific Officer David Dornan a stock option for 85,887 shares of common stock at an exercise price of $4.09 per share, expiring in 2036, and 85,887 RSUs, each RSU representing one share of common stock.

How do the new stock options for WHWK’s CSO vest?

Subject to continued service, 25% of the option shares vest on the one-year anniversary of the Vesting Commencement Date, and 1/48 of the total option shares vest monthly thereafter so all shares are fully vested on the four-year anniversary.

What is the vesting schedule for the 85,887 RSUs reported by WHWK?

Subject to continued service, 100% of the 85,887 RSUs vest on the one-year anniversary of the Vesting Commencement Date, which is defined in the award as September 15, 2026.

What correction does this amended Form 4/A make for WHWK?

The amendment states that the original Form 4 for David Dornan erroneously reflected an incorrect vesting schedule for the RSUs and clarifies that all RSU shares vest 100% on the one-year anniversary of the Vesting Commencement Date, subject to continued service.

Are the WHWK equity awards to the CSO subject to continued service?

Yes. Both the stock option and RSU awards require that the reporting person continue to be a Service Provider under WHWK’s 2021 Equity Incentive Plan through each applicable vesting date for the shares to vest.

Were the WHWK insider transactions made under a Rule 10b5-1 plan?

No. The filing’s Rule 10b5-1 checkbox is not affirmatively marked; the data indicate no Rule 10b5-1 trading plan is reported for these equity grants.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/18/2026 - 04:43 PM Accepted by SEC EDGAR 09/18/2026 - 04:43 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Dornan David

(Last) (First) (Middle)

C/O WHITEHAWK THERAPEUTICS, INC.

2 HEADQUARTERS PLAZA, EAST BUILDING, 11T

(Street)

MORRISTOWN NEW JERSEY 07960

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Whitehawk Therapeutics, Inc. [ WHWK ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Scientific Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
09/15/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)
09/15/2026

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	$4.09	09/15/2026		A		85,887		(1)	09/15/2036	Common Stock	85,887	$0	85,887	D
Restricted Stock Units	(2)	09/15/2026		A		85,887		(3)	(3)	Common Stock	85,887	$0	85,887	D

Explanation of Responses:

1. 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 option shall vest on the one-year anniversary of the Vesting Commencement Date and 1/48th of the total shares subject to the option shall vest every month thereafter such that all shares subject to the option shall be fully vested on the four-year anniversary of the Vesting Commencement Date. "Vesting Commencement Date" shall mean September 15, 2026.

2. Each restricted stock unit ("RSU") represents a contingent right to receive one share of Whitehawk Therapeutics, Inc. Common Stock.

3. The original Form 4 filed by the Reporting Person erroneously reflected an incorrect vesting schedule. Subject to the Reporting Person continuing to be a Service Provider (as defined in the Issuer's 2021 Equity Incentive Plan) through the applicable date, one hundred percent (100%) of the shares subject to the award shall vest on the one-year anniversary of the Vesting Commencement Date. "Vesting Commencement Date" shall mean September 15, 2026.

	/s/ Stephen Rodin, as Attorney-in-Fact	09/18/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)