Day One Biopharmaceuticals, Inc. — Insider Transactions
Form 4 filings by directors, officers, and 10%+ shareholders
SEC rules require corporate insiders — including directors, executive officers, and any shareholder owning more than 10% of a company's shares — to report changes in their ownership within two business days of a transaction. These disclosures are filed as Form 4. Open-market purchases (code P) are generally considered the most meaningful signal, as insiders are spending their own money.
| Insider | Title | Type | Shares | Price | Value | Owns After | Date |
|---|---|---|---|---|---|---|---|
| York Charles N II | COO, CFO and Secretary | Sale | 956 | $11.69 | $11,176 | 270,170 | Nov 15, 2023 |
| Dubow Adam | General Counsel | Sale | 5,313 | $11.69 | $62,109 | 11,428 | Nov 15, 2023 |
| Bender Jeremy | Chief Executive Officer | Option Exercise | 4,750 | — | — | 712,536 | Nov 15, 2023 |
| ACCESS INDUSTRIES MANAGEMENT, LLC | — | Purchase | 384,400 | $10.06 | $3,867,064 | 12,817,935 | Oct 18, 2023 |
| York Charles N II | COO, CFO and Secretary | Option Exercise | 2,250 | — | — | 268,423 | Aug 17, 2023 |
| Blackman Samuel C. | Head of Research and Developme | Sale | 668 | $13.86 | $9,258 | 1,236,319 | Aug 15, 2023 |
| Bender Jeremy | Chief Executive Officer | Sale | 2,996 | $13.86 | $41,525 | 704,224 | Aug 15, 2023 |
| Bender Jeremy | Chief Executive Officer | Gift | 240,288 | — | — | 240,288 | Jul 1, 2023 |
| Blavatnik Len | — | Purchase | 769,230 | $13.00 | $9,999,990 | 11,453,868 | Jun 9, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 1,229 | $16.00 | $19,664 | 1,234,363 | Jun 5, 2023 |
| York Charles N II | COO, CFO and Secretary | Option Exercise | 2,250 | — | — | 265,753 | May 16, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 692 | $13.12 | $9,079 | 1,235,592 | May 15, 2023 |
| Bender Jeremy | Chief Executive Officer | Sale | 3,104 | $13.12 | $40,724 | 1,179,484 | May 15, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 10,000 | $18.05 | $180,500 | 1,233,660 | Mar 10, 2023 |
| Bender Jeremy | Chief Executive Officer | Sale | 12,500 | $20.01 | $250,125 | 1,174,276 | Mar 7, 2023 |
| Grant Julie Papanek | — | Sale | 25,000 | $18.61 | $465,250 | 330,000 | Mar 1, 2023 |
| York Charles N II | COO, CFO and Secretary | Sale | 9,377 | $20.03 | $187,821 | 262,128 | Feb 17, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Option Exercise | 1,187 | — | — | 1,242,897 | Feb 16, 2023 |
| York Charles N II | COO, CFO and Secretary | Sale | 930 | $19.57 | $18,200 | 271,505 | Feb 15, 2023 |
| Bender Jeremy | Chief Executive Officer | Option Exercise | 3,562 | — | — | 1,185,048 | Feb 15, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 10,000 | $20.07 | $200,700 | 1,241,710 | Feb 10, 2023 |
| Grant Julie Papanek | — | Sale | 1,106 | $21.69 | $23,989 | 355,000 | Feb 1, 2023 |
| Bender Jeremy | Chief Executive Officer | Sale | 12,500 | $22.00 | $275,000 | 1,181,486 | Jan 23, 2023 |
| York Charles N II | COO, CFO and Secretary | Sale | 10,000 | $22.75 | $227,500 | 268,810 | Jan 20, 2023 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 2,500 | $23.20 | $58,000 | 1,250,148 | Jan 10, 2023 |
| Grant Julie Papanek | — | Sale | 7,610 | $21.31 | $162,169 | 380,000 | Jan 3, 2023 |
| Bender Jeremy | Chief Executive Officer | Sale | 12,500 | $20.32 | $254,000 | 1,192,424 | Dec 21, 2022 |
| York Charles N II | COO, CFO and Secretary | Sale | 10,000 | $20.07 | $200,700 | 276,497 | Dec 20, 2022 |
| Atlas Venture Fund XI, L.P. | — | Other | 600,854 | — | — | 6,008,534 | Dec 12, 2022 |
| Grant Julie Papanek | — | Sale | 4,358 | $22.08 | $96,225 | 405,000 | Dec 8, 2022 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 900 | $22.16 | $19,944 | 1,260,148 | Dec 1, 2022 |
| Grant Julie Papanek | — | Sale | 4,760 | $21.72 | $103,387 | 414,598 | Dec 1, 2022 |
| Bender Jeremy | Chief Executive Officer | Sale | 400 | $21.38 | $8,552 | 1,204,924 | Nov 21, 2022 |
| York Charles N II | COO, CFO and Secretary | Sale | 300 | $21.39 | $6,417 | 286,497 | Nov 21, 2022 |
| Bender Jeremy | Chief Executive Officer | Option Exercise | 3,562 | — | — | 1,218,937 | Nov 16, 2022 |
| Blackman Samuel C. | Chief Medical Officer | Option Exercise | 1,187 | — | — | 1,270,525 | Nov 16, 2022 |
| York Charles N II | COO, CFO and Secretary | Sale | 430 | $21.46 | $9,228 | 296,497 | Nov 15, 2022 |
| York Charles N II | COO, CFO and Secretary | Sale | 10,000 | $20.03 | $200,300 | 294,401 | Nov 1, 2022 |
| Grant Julie Papanek | — | Sale | 5,000 | $20.01 | $100,050 | 419,358 | Nov 1, 2022 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 10,000 | $20.01 | $200,100 | 1,269,338 | Nov 1, 2022 |
| Bender Jeremy | Chief Executive Officer | Sale | 12,500 | $20.03 | $250,375 | 1,215,375 | Nov 1, 2022 |
| York Charles N II | COO, CFO and Secretary | Sale | 10,000 | $20.05 | $200,500 | 304,401 | Oct 3, 2022 |
| Grant Julie Papanek | — | Sale | 5,000 | $20.00 | $100,000 | 429,358 | Oct 3, 2022 |
| Blackman Samuel C. | Chief Medical Officer | Sale | 10,000 | $19.99 | $199,900 | 1,279,338 | Oct 3, 2022 |
| Bender Jeremy | Chief Executive Officer | Sale | 12,500 | $20.05 | $250,625 | 1,227,875 | Oct 3, 2022 |
| Canaan XI L.P. | — | Other | 1,500,000 | — | — | 6,964,301 | Sep 21, 2022 |
| Grant Julie Papanek | — | Other | 1,500,000 | — | — | 6,964,301 | Sep 21, 2022 |
| Canaan Partners XI LLC | — | Sale | 111,585 | $21.53 | $2,402,425 | 9,307,021 | Sep 20, 2022 |
| Atlas Venture Fund XI, L.P. | — | Other | 600,854 | — | — | 6,609,388 | Sep 19, 2022 |
| Grant Julie Papanek | — | Sale | 2,266 | $20.10 | $45,547 | 9,077,904 | Sep 19, 2022 |