York Charles N II - Insider Non-Derivative Transactions at Day One Biopharmaceuticals, Inc. (DAWN) - (SEC)
Updated on January 3, 2026.
According to recent SEC insider information filed on Nov 17, 2025, York Charles N II's relationship to Day One Biopharmaceuticals, Inc. (DAWN) is Officer (COO and CFO), and currently has 294,715 shares of Common Stock.
The chart below shows the number of shares owned, and the table shows the recent insider transactions.
You can see similar information for other DAWN insiders.
Related Topics: SEC Topic List.
Data Source: SEC.
York Charles N II - Insider Non-Derivative Transactions of DAWN Common Stock
York Charles N II - Insider Non-Derivative Transactions at DAWN
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| Date | Transaction | No. of Shares | Price Per Share | Shares Owned After Transactions |
|---|---|---|---|---|
| Nov 18, 2025 | Sell -- (Common Stock) | 4062 | 8.91 | 294715 |
| Nov 16, 2025 | M -- (Common Stock) | 1375 | 0 | 283277 |
| Nov 16, 2025 | M -- (Common Stock) | 2250 | 0 | 285527 |
| Nov 16, 2025 | M -- (Common Stock) | 6625 | 0 | 292152 |
| Nov 16, 2025 | M -- (Common Stock) | 6625 | 0 | 298777 |
| Aug 19, 2025 | Sell -- (Common Stock) | 4106 | 6.77 | 278000 |
| Aug 16, 2025 | M -- (Common Stock) | 1375 | 0 | 266606 |
| Aug 16, 2025 | M -- (Common Stock) | 2250 | 0 | 268856 |
| Aug 16, 2025 | M -- (Common Stock) | 6625 | 0 | 275481 |
| Aug 16, 2025 | M -- (Common Stock) | 6625 | 0 | 282106 |
| May 17, 2025 | Sell -- (Common Stock) | 4282 | 6.26 | 265231 |
| May 16, 2025 | M -- (Common Stock) | 1375 | 0 | 254013 |
| May 16, 2025 | M -- (Common Stock) | 2250 | 0 | 256263 |
| May 16, 2025 | M -- (Common Stock) | 6625 | 0 | 262888 |
| May 16, 2025 | M -- (Common Stock) | 6625 | 0 | 269513 |
| Feb 19, 2025 | Sell -- (Common Stock) | 4370 | 11.96 | 252638 |
| Feb 16, 2025 | M -- (Common Stock) | 1375 | 0 | 241508 |
| Feb 16, 2025 | M -- (Common Stock) | 2250 | 0 | 243758 |
| Feb 16, 2025 | M -- (Common Stock) | 6625 | 0 | 250383 |
| Feb 16, 2025 | M -- (Common Stock) | 6625 | 0 | 257008 |
| Nov 19, 2024 | Sell -- (Common Stock) | 2602 | 13.21 | 240133 |
| Nov 16, 2024 | M -- (Common Stock) | 1375 | 0 | 233860 |
| Nov 16, 2024 | M -- (Common Stock) | 2250 | 0 | 236110 |
| Nov 16, 2024 | M -- (Common Stock) | 6625 | 0 | 242735 |
| Aug 17, 2024 | Sell -- (Common Stock) | 2633 | 14 | 232485 |
| Aug 16, 2024 | M -- (Common Stock) | 1375 | 0 | 226243 |
| Aug 16, 2024 | M -- (Common Stock) | 2250 | 0 | 228493 |
| Aug 16, 2024 | M -- (Common Stock) | 6625 | 0 | 235118 |
| May 17, 2024 | Sell -- (Common Stock) | 2675 | 16.08 | 224868 |
| May 16, 2024 | M -- (Common Stock) | 1375 | 0 | 218668 |
| May 16, 2024 | M -- (Common Stock) | 2250 | 0 | 220918 |
| May 16, 2024 | M -- (Common Stock) | 6625 | 0 | 227543 |
| May 4, 2024 | Sell -- (Common Stock) | 8078 | 17.85 | 217293 |
| May 3, 2024 | Sell -- (Common Stock) | 200 | 17.9 | 225371 |
| May 2, 2024 | Sell -- (Common Stock) | 52183 | 17.89 | 225571 |
| Feb 17, 2024 | Sell -- (Common Stock) | 2666 | 15.25 | 277754 |
| Feb 16, 2024 | M -- (Common Stock) | 1375 | 0 | 271545 |
| Feb 16, 2024 | M -- (Common Stock) | 2250 | 0 | 273795 |
| Feb 16, 2024 | M -- (Common Stock) | 6625 | 0 | 280420 |
| Nov 17, 2023 | Sell -- (Common Stock) | 956 | 11.69 | 270170 |
| Nov 16, 2023 | M -- (Common Stock) | 1375 | 0 | 268876 |
| Nov 16, 2023 | M -- (Common Stock) | 2250 | 0 | 271126 |
| Aug 18, 2023 | Sell -- (Common Stock) | 922 | 13.86 | 267501 |
| Aug 16, 2023 | M -- (Common Stock) | 1375 | 0 | 266173 |
| Aug 16, 2023 | M -- (Common Stock) | 2250 | 0 | 268423 |
| May 17, 2023 | Sell -- (Common Stock) | 955 | 13.12 | 264798 |
| May 16, 2023 | M -- (Common Stock) | 1375 | 0 | 263503 |
| May 16, 2023 | M -- (Common Stock) | 2250 | 0 | 265753 |
| Feb 18, 2023 | Sell -- (Common Stock) | 9377 | 20.03 | 262128 |
| Feb 17, 2023 | Sell -- (Common Stock) | 930 | 19.57 | 271505 |
| Feb 16, 2023 | M -- (Common Stock) | 1375 | 0 | 270185 |
| Feb 16, 2023 | M -- (Common Stock) | 2250 | 0 | 272435 |
| Jan 21, 2023 | Sell -- (Common Stock) | 10000 | 22.75 | 268810 |
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