Michael Vasconcelles, Head of Research and Development at Day One Biopharmaceuticals ($DAWN), made one open market sale of company shares in the last year, totaling $31,647. His most recent transaction occurred on February 17, 2026. Among 11,678 insiders with recent sales, his activity ranks 10,770th by value, well below the average of $8.6 million across 6.4 transactions per seller. He reported no open market purchases.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Feb. 15, 2026 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | M | Common Stock | 7125 | $0.00 | 7,125.0000 | 103,381,315 | 9999.99% | 0.01% |
| Feb. 15, 2026 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | M | Restricted Stock Unit (RSU) | 7125 | $0.00 | 106,875.0000 | 103,381,315 | 6.25% | 0.01% |
| Feb. 17, 2026 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | S | Common Stock | 2728 | $11.60 | 4,397.0000 | 103,381,315 | 38.29% | 0.00% |
| Jan. 30, 2026 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | A | Stock Option (right to buy Common Stock) | 171000 | $0.00 | 171,000.0000 | 103,381,315 | 9999.99% | 0.17% |
| Jan. 30, 2026 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | A | Restricted Stock Units | 114000 | $0.00 | 114,000.0000 | 103,381,315 | 9999.99% | 0.11% |
| June 16, 2025 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | A | Stock Option (right to buy Common Stock) | 346000 | $0.00 | 346,000.0000 | 93,234,195 | 9999.99% | 0.37% |
| June 16, 2025 | Day One Biopharmaceuticals, Inc. | $DAWN | VASCONCELLES MICHAEL | Head of Research and Dev. | A | Restricted Stock Unit (RSU) | 226000 | $0.00 | 226,000.0000 | 93,234,195 | 9999.99% | 0.24% |
| June 5, 2025 | Kura Oncology, Inc. | $KURA | VASCONCELLES MICHAEL | Not found | A | Option to purchase common stock | 28500 | $0.00 | 28,500.0000 | 86,161,000 | 9999.99% | 0.03% |
| Sept. 13, 2024 | Kura Oncology, Inc. | $KURA | VASCONCELLES MICHAEL | Not found | A | Option to purchase common stock | 52000 | $0.00 | 52,000.0000 | 73,229,000 | 9999.99% | 0.07% |
| Sept. 13, 2024 | Kura Oncology, Inc. | $KURA | VASCONCELLES MICHAEL | Not found | A | Option to purchase common stock | 17333 | $0.00 | 17,333.0000 | 73,229,000 | 9999.99% | 0.02% |