Day One Biopharmaceuticals, Inc. (DAWN)

Latest Insider Confidence Score

2026Q1

46.2
Bearish

Company insider confidence (by quarter)

2021Q2 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Access Industries Holdings LLC Other 12,929,322 Oct 20, 2023
Access Industries Management, Llc Other 12,929,322 Oct 20, 2023
Blavatnik Len Other 12,929,322 Oct 20, 2023
AI Day1 LLC 10% Owner 12,929,322 Oct 20, 2023
Canaan XI L.P. 10% Owner 6,964,301 Sep 22, 2022

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Feb 15, 2026 Feb 18, 2026 Merendino Lauren Chief Commercial Officer Sell 22.5 -5,814 -8.81% $67.4K
Feb 15, 2026 Feb 18, 2026 Dubow Adam Gen Counsel & Secretary Sell 22.5 -6,395 -8.09% $74.2K
Feb 15, 2026 Feb 18, 2026 York Charles N II CFO Sell 22.5 -6,065 -1.91% $70.4K
Feb 15, 2026 Feb 18, 2026 Bender Jeremy CEO Sell 32.5 -15,459 -0.85% $179.3K
Feb 15, 2026 Feb 18, 2026 VASCONCELLES MICHAEL Head of Research and Dev. Sell 26.3 -2,728 -38.29% $31.6K
Jan 30, 2026 Jan 30, 2026 York Charles N II CFO Neutral 52.5 - 0.00% -
Jan 30, 2026 Jan 30, 2026 VASCONCELLES MICHAEL Head of Research and Dev. Neutral 52.5 - 0.00% -
Jan 30, 2026 Jan 30, 2026 Bender Jeremy CEO Neutral 52.5 - 0.00% -
Jan 30, 2026 Jan 30, 2026 Merendino Lauren Chief Commercial Officer Neutral 52.5 - 0.00% -
Jan 30, 2026 Jan 30, 2026 Dubow Adam Gen Counsel & Secretary Neutral 52.5 - 0.00% -
Nov 25, 2025 Nov 26, 2025 Bender Jeremy CEO Neutral 37.5 -14,450 -0.90% -
Nov 15, 2025 Nov 18, 2025 Dubow Adam Gen Counsel & Secretary Sell 26.3 -4,319 -6.45% $38.5K
Nov 15, 2025 Nov 18, 2025 York Charles N II CFO Sell 26.3 -4,062 -1.36% $36.2K
Nov 15, 2025 Nov 18, 2025 Merendino Lauren Chief Commercial Officer Sell 26.3 -3,726 -6.83% $33.2K
Nov 15, 2025 Nov 18, 2025 Bender Jeremy CEO Sell 32.5 -15,894 -0.88% $141.7K
Nov 6, 2025 Nov 7, 2025 Dable Habib J Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Bender Jeremy CEO Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Josey John A. Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Holles Natalie C. Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Nicholson Garry A Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Garland J. Scott Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Ramasastry Saira Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 York Charles N II CFO Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Dubow Adam Gen Counsel & Secretary Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Grossman William Director Neutral 52.5 - 0.00% -
Nov 6, 2025 Nov 7, 2025 Merendino Lauren Chief Commercial Officer Neutral 52.5 - 0.00% -
Aug 15, 2025 Aug 19, 2025 York Charles N II CFO Sell 26.3 -4,106 -1.46% $27.8K
Aug 15, 2025 Aug 19, 2025 Dubow Adam Gen Counsel & Secretary Sell 26.3 -4,365 -7.37% $29.5K
Aug 15, 2025 Aug 19, 2025 Bender Jeremy CEO Sell 32.5 -16,058 -0.90% $108.7K
Aug 15, 2025 Aug 19, 2025 Merendino Lauren Chief Commercial Officer Sell 26.3 -3,766 -8.24% $25.5K
Jul 10, 2025 Jul 14, 2025 Bender Jeremy CEO Neutral 52.5 - 0.00% -
Jun 16, 2025 Jun 18, 2025 VASCONCELLES MICHAEL Head of Research and Dev. Neutral 52.5 - 0.00% -
Jun 18, 2025 VASCONCELLES MICHAEL Head of Research and Dev. Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Grossman William Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Dable Habib J Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Ramasastry Saira Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Garland J. Scott Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Nicholson Garry A Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Holles Natalie C. Director Neutral 52.5 - 0.00% -
Jun 2, 2025 Jun 4, 2025 Josey John A. Director Neutral 52.5 - 0.00% -
May 15, 2025 May 19, 2025 Merendino Lauren Chief Commercial Officer Sell 26.3 -3,927 -10.05% $24.6K
May 15, 2025 May 19, 2025 Dubow Adam GENERAL COUNSEL Sell 26.3 -4,552 -8.81% $28.5K
May 15, 2025 May 19, 2025 York Charles N II CFO Sell 26.3 -4,282 -1.59% $26.8K
May 15, 2025 May 19, 2025 Bender Jeremy CEO Sell 32.5 -13,964 -0.79% $87.4K
Feb 28, 2025 Merendino Lauren Chief Commercial Officer Neutral 52.5 - 0.00% -
Feb 15, 2025 Feb 21, 2025 York Charles N II CFO Sell 22.5 -4,370 -1.70% $52.3K
Feb 15, 2025 Feb 21, 2025 Dubow Adam GENERAL COUNSEL Sell 22.5 -4,646 -10.50% $55.6K
Feb 15, 2025 Feb 21, 2025 Bender Jeremy CEO Sell 32.5 -12,048 -0.69% $144.1K
Jan 15, 2025 Jan 31, 2025 York Charles N II CFO Neutral 52.5 - 0.00% -
Jan 15, 2025 Jan 31, 2025 Bender Jeremy CEO Neutral 52.5 - 0.00% -
Jan 15, 2025 Jan 31, 2025 Dubow Adam GENERAL COUNSEL Neutral 52.5 - 0.00% -
Dec 10, 2024 Dec 12, 2024 Blackman Samuel C. HEAD OF R&D Sell 42.5 -30,000 -1.45% $399.3K
Nov 15, 2024 Nov 19, 2024 Bender Jeremy CEO Sell 32.5 -10,554 -0.61% $139.4K
Nov 15, 2024 Nov 19, 2024 Blackman Samuel C. HEAD OF R&D Sell 51.3 -2,206 -0.11% $29.1K
Nov 15, 2024 Nov 19, 2024 Dubow Adam GENERAL COUNSEL Sell 26.3 -3,165 -8.96% $41.8K
Nov 15, 2024 Nov 19, 2024 York Charles N II CFO Sell 26.3 -2,602 -1.07% $34.4K
Nov 8, 2024 Nov 12, 2024 Blackman Samuel C. HEAD OF R&D Sell 42.5 -28,255 -1.35% $456.2K
Nov 7, 2024 Nov 8, 2024 Blackman Samuel C. HEAD OF R&D Sell 47.5 -11,245 -0.54% $180.3K
Oct 31, 2024 Nov 4, 2024 Blackman Samuel C. HEAD OF R&D Sell 58.8 -500 -0.02% $8K
Sep 10, 2024 Sep 12, 2024 Blackman Samuel C. HEAD OF R&D Sell 42.5 -30,000 -1.41% $426.7K
Aug 15, 2024 Aug 19, 2024 Dubow Adam GENERAL COUNSEL Sell 26.3 -3,202 -10.63% $44.8K
Aug 15, 2024 Aug 19, 2024 York Charles N II CFO Sell 26.3 -2,633 -1.12% $36.9K
Aug 15, 2024 Aug 19, 2024 Blackman Samuel C. HEAD OF R&D Sell 51.3 -2,232 -0.10% $31.2K
Aug 15, 2024 Aug 19, 2024 Bender Jeremy CEO Sell 32.5 -10,681 -0.62% $149.5K
Aug 1, 2024 Aug 5, 2024 AI Day1 LLC 10% Owner Neutral 52.5 - 0.00% -
Jul 16, 2024 Jul 17, 2024 Blackman Samuel C. HEAD OF R&D Sell 45.0 -20,000 -0.93% $320.2K
Jul 2, 2024 Jul 5, 2024 Bender Jeremy CEO Neutral 52.5 - 0.00% -
Jun 21, 2024 Jun 21, 2024 Ramasastry Saira Director Sell 22.5 -10,000 -19.81% $131.9K
Jun 10, 2024 Jun 12, 2024 Blackman Samuel C. HEAD OF R&D Sell 42.5 -30,000 -1.38% $378.6K
May 23, 2024 May 28, 2024 Garland J. Scott Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Grossman William Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Ramasastry Saira Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Nicholson Garry A Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Josey John A. Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Holles Natalie C. Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Gladstone Michael Director Neutral 52.5 - 0.00% -
May 23, 2024 May 28, 2024 Dable Habib J Director Neutral 52.5 - 0.00% -
May 15, 2024 May 17, 2024 Bender Jeremy CEO Sell 40.0 -7,873 -0.46% $126.6K
May 15, 2024 May 17, 2024 Blackman Samuel C. HEAD OF R&D Sell 51.3 -2,267 -0.10% $36.5K
May 15, 2024 May 17, 2024 York Charles N II CFO Sell 26.3 -2,675 -1.18% $43K
May 15, 2024 May 17, 2024 Dubow Adam GENERAL COUNSEL Sell 22.5 -3,253 -13.02% $52.3K
May 10, 2024 May 14, 2024 Blackman Samuel C. HEAD OF R&D Sell 48.8 -10,000 -0.46% $163.7K
May 1, 2024 May 3, 2024 Bender Jeremy CEO Sell 32.5 -79,211 -4.49% $1.4M
May 1, 2024 May 3, 2024 York Charles N II CFO Sell 10.0 -60,461 -21.77% $1.1M
Apr 18, 2024 Apr 22, 2024 Blackman Samuel C. HEAD OF R&D Sell 48.8 -10,000 -0.46% $160.2K
Mar 25, 2024 Mar 26, 2024 Blackman Samuel C. HEAD OF R&D Sell 48.8 -10,000 -0.46% $160.1K
Mar 11, 2024 Mar 13, 2024 Blackman Samuel C. HEAD OF R&D Sell 42.5 -30,000 -1.35% $457.3K
Feb 27, 2024 Feb 28, 2024 Blackman Samuel C. HEAD OF R&D Sell 45.0 -20,000 -0.89% $322.2K
Feb 15, 2024 Feb 20, 2024 Dubow Adam GENERAL COUNSEL Sell 26.3 -3,242 -16.35% $49.4K
Feb 15, 2024 Feb 20, 2024 York Charles N II CFO Sell 36.3 -2,666 -0.95% $40.7K
Feb 15, 2024 Feb 20, 2024 Blackman Samuel C. HEAD OF RESEARCH AND DEVELOPME Sell 51.3 -2,258 -0.10% $34.4K
Feb 15, 2024 Feb 20, 2024 Bender Jeremy CEO Sell 40.0 -7,615 -0.43% $116.1K
Jan 17, 2024 Jan 19, 2024 Grossman William Director Neutral 52.5 - 0.00% -
Jan 17, 2024 Jan 19, 2024 Dable Habib J Director Neutral 52.5 - 0.00% -
Jan 19, 2024 Grossman William Director Neutral 52.5 - 0.00% -
Jan 19, 2024 Dable Habib J Director Neutral 52.5 - 0.00% -
Jan 5, 2024 Jan 9, 2024 York Charles N II CFO Neutral 52.5 - 0.00% -
Jan 5, 2024 Jan 9, 2024 Dubow Adam General Counsel Neutral 52.5 - 0.00% -
Jan 5, 2024 Jan 9, 2024 Blackman Samuel C. Head of Research and Developme Neutral 52.5 - 0.00% -
Jan 5, 2024 Jan 9, 2024 Bender Jeremy CEO Neutral 52.5 - 0.00% -