Day One Biopharmaceuticals, Inc.
DAWN
23 insider filings · Latest: Apr 23, 2026
Common Stock Transactions
| Txn Date | Accepted | Insider | Type | Shares | Avg Price | Value | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|---|
| Feb 17, 2026 | Feb 18 10:18 PM | Lauren MerendinoChief Commercial Officer | Sale | 5,814 | $11.60 | $67.4K | 60,157(D) | View → |
| Feb 17, 2026 | Feb 18 10:17 PM | Adam DubowGen Counsel & Secretary | Sale | 6,395 | $11.60 | $74.2K | 72,694(D) | View → |
| Feb 17, 2026 | Feb 18 10:16 PM | Charles N York IICOO and CFO | Sale | 6,065 | $11.60 | $70.4K | 312,025(D) | View → |
| Feb 17, 2026 | Feb 18 10:14 PM | Jeremy BenderDirector, CHIEF EXECUTIVE OFFICER | Sale | 15,459 | $11.60 | $179.3K | 204,603(D) | View → |
| Feb 17, 2026 | Feb 18 10:13 PM | Michael VasconcellesHead of Research and Dev. | Sale | 2,728 | $11.60 | $31.6K | 4,397(D) | View → |
| Feb 17, 2026 | Feb 17 11:21 PM | JEREMY BENDER | Proposed Sale | 15,459 | $11.60 | $179.3K | — | View → |
| Feb 17, 2026 | Feb 17 11:18 PM | CHARLES YORK | Proposed Sale | 6,065 | $11.60 | $70.4K | — | View → |
| Feb 17, 2026 | Feb 17 11:13 PM | LAUREN MERENDINO | Proposed Sale | 5,814 | $11.60 | $67.4K | — | View → |
| Feb 17, 2026 | Feb 17 11:08 PM | ADAM DUBOW | Proposed Sale | 6,395 | $11.60 | $74.2K | — | View → |
| Nov 17, 2025 | Nov 17 9:12 PM | CHARLES YORK | Proposed Sale | 4,062 | $8.91 | $36.2K | — | View → |
| Nov 17, 2025 | Nov 17 9:12 PM | LAUREN MERENDINO | Proposed Sale | 3,726 | $8.91 | $33.2K | — | View → |
| Nov 17, 2025 | Nov 17 9:11 PM | ADAM DUBOW | Proposed Sale | 4,319 | $8.91 | $38.5K | — | View → |
| Nov 17, 2025 | Nov 17 9:09 PM | JEREMY BENDER | Proposed Sale | 15,894 | $8.91 | $141.7K | — | View → |
| Aug 18, 2025 | Aug 18 9:33 PM | JEREMY BENDER | Proposed Sale | 16,058 | $6.77 | $108.7K | — | View → |
| May 16, 2025 | May 16 8:09 PM | CHARLES YORK | Proposed Sale | 4,282 | $6.26 | $26.8K | — | View → |
| May 16, 2025 | May 16 8:09 PM | LAUREN MERENDINO | Proposed Sale | 3,927 | $6.26 | $24.6K | — | View → |
| May 16, 2025 | May 16 8:08 PM | ADAM DUBOW | Proposed Sale | 4,552 | $6.26 | $28.5K | — | View → |
| May 16, 2025 | May 16 8:08 PM | JEREMY BENDER | Proposed Sale | 13,964 | $6.26 | $87.4K | — | View → |
| Feb 18, 2025 | Feb 18 11:07 PM | ADAM DUBOW | Proposed Sale | 4,646 | $11.96 | $55.6K | — | View → |
| Feb 18, 2025 | Feb 18 11:04 PM | CHARLES YORK | Proposed Sale | 4,370 | $11.96 | $52.3K | — | View → |
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Stock Options & Derivatives
| Txn Date | Accepted | Insider | Type | Shares | Exercise Price | Shares Owned | Filing |
|---|---|---|---|---|---|---|---|
| Apr 23, 2026 | Apr 27 9:27 PM | AI Day1 LLC10% Owner | Disposition | 827,586 | $0.0001 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:40 PM | Jeremy BenderDirector, CHIEF EXECUTIVE OFFICER | Disposition | 3,477,953 | $11.16 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:39 PM | Michael VasconcellesHead of Research and Dev. | Disposition | 849,875 | $11.16 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:39 PM | Charles N York IICOO and CFO | Disposition | 1,520,792 | $11.16 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:38 PM | Adam DubowGen Counsel & Secretary | Disposition | 830,145 | $11.16 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:37 PM | Natalie C. HollesDirector | Disposition | 216,335 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:36 PM | Saira RamasastryDirector | Disposition | 223,616 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:35 PM | John A. JoseyDirector | Disposition | 200,216 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:34 PM | Scott J. GarlandDirector | Disposition | 184,107 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:33 PM | Habib J DableDirector | Disposition | 136,495 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:31 PM | William GrossmanDirector | Disposition | 136,495 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:30 PM | Garry A NicholsonDirector | Disposition | 141,235 | $8.99 | 0(D) | View → |
| Apr 23, 2026 | Apr 23 8:30 PM | Lauren MerendinoChief Commercial Officer | Disposition | 774,934 | $11.16 | 0(D) | View → |
| Feb 15, 2026 | Feb 18 10:18 PM | Lauren MerendinoChief Commercial Officer | Option Exercise | 15,162 | — | 69,375(D) | View → |
| Feb 15, 2026 | Feb 18 10:17 PM | Adam DubowGen Counsel & Secretary | Option Exercise | 16,463 | — | 65,625(D) | View → |
| Feb 15, 2026 | Feb 18 10:16 PM | Charles N York IICOO and CFO | Option Exercise | 23,375 | — | 118,125(D) | View → |
| Feb 15, 2026 | Feb 18 10:14 PM | Jeremy BenderDirector, CHIEF EXECUTIVE OFFICER | Option Exercise | 42,937 | — | 222,188(D) | View → |
| Feb 15, 2026 | Feb 18 10:13 PM | Michael VasconcellesHead of Research and Dev. | Option Exercise | 7,125 | — | 106,875(D) | View → |
| Jan 30, 2026 | Jan 30 10:19 PM | Charles N York IICOO and CFO | Grant/Award | 314,000 | $11.16 | 126,000(D) | View → |
| Jan 30, 2026 | Jan 30 10:18 PM | Michael VasconcellesHead of Research and Dev. | Grant/Award | 285,000 | $11.16 | 114,000(D) | View → |
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