Insider sales reported for WhiteHawk Therapeutics (NASDAQ: WHWK) during March–April 2026

Rhea-AI Filing Summary

David James Lennon reported multiple Rule 144 sales of Common Stock of WhiteHawk Therapeutics. The filing lists specific dispositions on 03/02/2026 and 04/02/2026–04/08/2026, including sales of 5,100 shares and 102,395 shares on those dates respectively.

The notice also lists 775,828 Restricted Stock Units dated 04/01/2026.

Insights

Corporate Governance Analyst

Routine Rule 144 disposition notices by an individual holder; no material corporate change.

The filing lists specific open-market or reported sales by David James Lennon on several dates between 03/02/2026 and 04/08/2026, with single-day transactions as high as 102,395 shares. These filings serve to notify the market under Rule 144.

There is no indication in the excerpt of company proceeds or any change to corporate governance; subsequent SEC filings would show additional context if required.

Key Figures

Sale on 03/02/2026: 5,100 shares Sale on 04/06/2026: 102,395 shares Proceeds for 04/06/2026 sale: $359,406.45 +2 more

5 metrics

Sale on 03/02/2026 5,100 shares Disposition reported by David James Lennon on 03/02/2026

Sale on 04/06/2026 102,395 shares Disposition reported by David James Lennon on 04/06/2026

Proceeds for 04/06/2026 sale $359,406.45 Dollar amount shown alongside the 04/06/2026 transaction

Sale on 04/07/2026 94,087 shares Disposition reported by David James Lennon on 04/07/2026

Restricted Stock Units listed 775,828 RSUs Listed under Securities To Be Sold dated 04/01/2026

Key Terms

Rule 144, Restricted Stock Units, Common Stock

3 terms

Rule 144 regulatory

"reported multiple Rule 144 sales of Common Stock"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Units financial

"775,828 Restricted Stock Units dated 04/01/2026"

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.

Common Stock financial

"sales of Common Stock on 03/02/2026 and 04/02/2026–04/08/2026"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK
Filer CCC
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.

Relationship to Issuer

Relationship to Issuer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common Stock	E-TRADE Financial Corporation 3 Edison Drive Alpharetta GA 30005	4364	14750.32	47196564	04/09/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common Stock	04/01/2026	Restricted Stock Units	Issuer			775828	04/01/2026	N/A

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Name and Address of Seller	Title of Securities Sold	Date of Sale	Amount of Securities Sold	Gross Proceeds
David James Lennon c/o WHITEHAWK THERAPEUTICS, INC. 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T MORRISTOWN NJ 07960	Common Stock	03/02/2026	5100	16878.96
David James Lennon c/o WHITEHAWK THERAPEUTICS, INC. 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T MORRISTOWN NJ 07960	Common Stock	04/02/2026	26858	93465.84
David James Lennon c/o WHITEHAWK THERAPEUTICS, INC. 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T MORRISTOWN NJ 07960	Common Stoc	04/06/2026	102395	359406.45
David James Lennon c/o WHITEHAWK THERAPEUTICS, INC. 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T MORRISTOWN NJ 07960	Common Stock	04/07/2026	94087	322718.41
David James Lennon c/o WHITEHAWK THERAPEUTICS, INC. 2 HEADQUARTERS PLAZA, EAST BUILDING, 11T MORRISTOWN NJ 07960	Common Stock	04/08/2026	63945	217413.00

144: Remarks and Signature

Remarks

Date of Notice

ATTENTION:

The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.

Signature

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the WHWK Form 144 filing show?

The filing reports multiple Rule 144 sales by David James Lennon of WHWK common stock on specific dates. It lists dated transactions and share amounts, including several sales between 03/02/2026 and 04/08/2026.

How many shares did David James Lennon sell in the WHWK filing?

The filing lists individual sales by date, for example 5,100 shares on 03/02/2026 and 102,395 shares on 04/06/2026. The excerpt shows multiple separate dispositions rather than a single aggregated total.

Are proceeds from the WHWK sales disclosed in the Form 144?

Yes; the excerpt shows dollar proceeds for each listed sale line, for example $359,406.45 for the 04/06/2026 sale. Each line pairs shares sold with the corresponding dollar amount.

What are the Restricted Stock Units listed in the WHWK filing?

The excerpt lists 775,828 Restricted Stock Units with a date of 04/01/2026. The entry appears under securities to be sold but the filing excerpt does not state vesting details or sale method.