5 insiders reported 25 Form 4 transactions for Whitehawk Therapeutics, Inc. (WHWK) over the past 18 months (most recent 2026-05-18). Recent activity: Castelein Caley (Director) Buy 255,102 shares, Giacobello Scott M. (CHIEF FINANCIAL OFFICER) Buy 38,265 shares, BALL BRYAN (See remarks) Buy 51,020 shares, Dugan Margaret (Chief Medical Officer) Buy 19,132 shares, Lennon David James (CHIEF EXECUTIVE OFFICER) Buy 51,021 shares. Source: SEC Form 4.
| Date | Insider | Title | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-18 | Castelein Caley | Director | Buy | 255,102 | $1,000,000 |
| 2026-05-18 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Buy | 38,265 | $149,999 |
| 2026-05-18 | BALL BRYAN | See remarks | Buy | 51,020 | $199,998 |
| 2026-05-18 | Dugan Margaret | Chief Medical Officer | Buy | 19,132 | $74,997 |
| 2026-05-18 | Lennon David James | CHIEF EXECUTIVE OFFICER | Buy | 51,021 | $200,002 |
| 2026-04-17 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Sell | 77,000 | $297,220 |
| 2026-04-17 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Sell | 141,600 | $584,808 |
| 2026-04-15 | BALL BRYAN | See remarks | Sell | 26,389 | $91,306 |
| 2026-04-15 | BALL BRYAN | See remarks | Sell | 92,460 | $336,554 |
| 2026-04-13 | BALL BRYAN | See remarks | Sell | 50,000 | $178,500 |
| 2026-04-13 | BALL BRYAN | See remarks | Sell | 6,596 | $22,624 |
| 2026-04-10 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 14,500 | $49,010 |
| 2026-04-08 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 102,395 | $359,406 |
| 2026-04-08 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 94,087 | $322,718 |
| 2026-04-08 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 63,945 | $217,413 |
| 2026-04-03 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Buy | 473,902 | $0 |
| 2026-04-03 | BALL BRYAN | See remarks | Buy | 366,532 | $0 |
| 2026-04-03 | Lennon David James | CHIEF EXECUTIVE OFFICER | Buy | 775,828 | $0 |
| 2026-04-03 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 26,858 | $93,466 |
| 2026-03-10 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Buy | 6,750 | $0 |
| 2026-03-10 | Giacobello Scott M. | CHIEF FINANCIAL OFFICER | Sell | 2,594 | $8,586 |
| 2026-03-10 | BALL BRYAN | See remarks | Buy | 5,000 | $0 |
| 2026-03-10 | BALL BRYAN | See remarks | Sell | 1,834 | $6,071 |
| 2026-03-10 | Lennon David James | CHIEF EXECUTIVE OFFICER | Buy | 16,250 | $0 |
| 2026-03-10 | Lennon David James | CHIEF EXECUTIVE OFFICER | Sell | 5,100 | $16,881 |
Source: SEC Form 4 filings · as of 2026-05-18