Day One Biopharmaceuticals, Inc.
DAWNDelisted Apr 23, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001845337
Day One Biopharmaceuticals, Inc. was delisted on Apr 23, 2026; its insiders filed their last Form 4 on Apr 27, 2026; 208 institutions reported holding it in 13F filings for Q1 2026, worth $1.85B in total; Soros Fund Management was the only superinvestor holding it.
13F holders, Q1 2026
Institutional positions in Day One Biopharmaceuticals, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
DAWN is no longer listed, so this page shows Q1 2026. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 208
- +28 vs. Q4 2025
- Shares held
- 86.9M
- +12.0M (+16.0%) vs. Q4 2025
- Total value
- $1.85B
- +$1.15B (+165.0%) vs. Q4 2025
- New holders
- 84
- 61 more added
- Sold out
- 56
- 47 more reduced
4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting DAWN on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 1 | $3.55K |
| Q1 2026 | 208 | $1.85B |
| Q4 2025 | 184 | $758.4M |
| Q3 2025 | 173 | $603.5M |
| Q2 2025 | 174 | $561.1M |
| Q1 2025 | 184 | $747.1M |
| Q4 2024 | 164 | $1.19B |
| Q3 2024 | 166 | $1.28B |
| Q2 2024 | 157 | $1.03B |
| Q1 2024 | 148 | $1.20B |
| Q4 2023 | 139 | $1.12B |
| Q3 2023 | 130 | $951.5M |
| Q2 2023 | 140 | $941.0M |
| Q1 2023 | 126 | $818.1M |
| Q4 2022 | 109 | $1.29B |
| Q3 2022 | 93 | $1.21B |
| Q2 2022 | 87 | $1.06B |
| Q1 2022 | 66 | $429.6M |
| Q4 2021 | 58 | $698.3M |
| Q3 2021 | 45 | $452.9M |
| Q2 2021 | 33 | $401.1M |
| Q1 2021 | 0 | $0 |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Day One Biopharmaceuticals, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| State Street Corp | 2,869,876 | $61.5M | 0.00% | −1,419,690−33.1% | Reduced |
| JPMorgan Chase & Co | 3,134,753 | $67.1M | 0.00% | +3,091,223+7,101.4% | Added |
| Vanguard Capital Management LLC | 3,357,684 | $72.0M | 0.00% | +3,357,684 | New |
| Deerfield Management Company, L.P. (Series C) | 3,723,131 | $79.8M | 0.94% | 00.0% | Unchanged |
| Kryger Capital LLC | 3,896,485 | $83.5M | 5.91% | +3,896,485 | New |
| FIL Ltd | 4,131,907 | $88.6M | 0.07% | +4,131,907 | New |
| Glazer Capital, LLC | 4,683,687 | $100.4M | 2.13% | +4,683,687 | New |
| BlackRock, Inc. | 7,044,487 | $151.0M | 0.00% | −1,793,087−20.3% | Reduced |
| Atlas Venture Life Science Advisors, LLC | 0 | $0 | 0.00% | −6,412,560−100.0% | Sold out |
| Vestal Point Capital, LP | 0 | $0 | 0.00% | −5,200,000−100.0% | Sold out |
| AIGH Capital Management LLC | 0 | $0 | 0.00% | −1,992,021−100.0% | Sold out |
| Citadel Advisors LLC | 0 | $0 | 0.00% | −1,359,613−100.0% | Sold out |
| Jefferies Financial Group Inc. | 0 | $0 | 0.00% | −1,121,502−100.0% | Sold out |
| Mak Capital One LLC | 0 | $0 | 0.00% | −826,205−100.0% | Sold out |
| Jacobs Levy Equity Management, Inc | 0 | $0 | 0.00% | −729,281−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −645,544−100.0% | Sold out |
| Schroder Investment Management Group | 0 | $0 | 0.00% | −569,624−100.0% | Sold out |
| Pale Fire Capital SE | 0 | $0 | 0.00% | −544,063−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −535,290−100.0% | Sold out |
| Schonfeld Strategic Advisors LLC | 0 | $0 | 0.00% | −300,102−100.0% | Sold out |
| Logos Global Management LP | 0 | $0 | 0.00% | −300,000−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −282,025−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −253,143−100.0% | Sold out |
| Stonepine Capital Management, LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Catalytic Wealth RIA, LLC | 0 | $0 | 0.00% | −150,030−100.0% | Sold out |
| Sphera Funds Management Ltd. | 0 | $0 | 0.00% | −145,371−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −142,809−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −128,440−100.0% | Sold out |
| Nomura Holdings Inc | 0 | $0 | 0.00% | −115,000−100.0% | Sold out |
| Ameriprise Financial Inc | 0 | $0 | 0.00% | −87,073−100.0% | Sold out |
| Perkins Capital Management Inc | 0 | $0 | 0.00% | −84,000−100.0% | Sold out |
| Los Angeles Capital Management LLC | 0 | $0 | 0.00% | −100,314−100.0% | Sold out |
| Tudor Investment Corp Et Al | 0 | $0 | 0.00% | −62,316−100.0% | Sold out |
| Erste Asset Management GmbH | 0 | $0 | 0.00% | −51,200−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −50,355−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −49,333−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −43,284−100.0% | Sold out |
| Lion Point Capital, LP | 0 | $0 | 0.00% | −42,000−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −39,321−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −35,562−100.0% | Sold out |
| Quest Partners LLC | 0 | $0 | 0.00% | −35,326−100.0% | Sold out |
| Cetera Investment Advisers | 0 | $0 | 0.00% | −35,000−100.0% | Sold out |
| Public Employees Retirement System of Ohio | 0 | $0 | 0.00% | −34,267−100.0% | Sold out |
| Landscape Capital Management, L.L.C. | 0 | $0 | 0.00% | −33,898−100.0% | Sold out |
| Martingale Asset Management L P | 0 | $0 | 0.00% | −33,700−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −33,639−100.0% | Sold out |
| VARCOV Co. | 0 | $0 | 0.00% | −28,016−100.0% | Sold out |
| AlphaCentric Advisors LLC | 0 | $0 | 0.00% | −26,812−100.0% | Sold out |
| Knott David M Jr | 0 | $0 | 0.00% | −25,884−100.0% | Sold out |
| PDT Partners, LLC | 0 | $0 | 0.00% | −24,300−100.0% | Sold out |
| Bayesian Capital Management, LP | 0 | $0 | 0.00% | −20,277−100.0% | Sold out |
| KLP Kapitalforvaltning AS | 0 | $0 | 0.00% | −15,400−100.0% | Sold out |
| ACT Capital Management, LLC | 0 | $0 | 0.00% | −12,900−100.0% | Sold out |
| DRW Securities, LLC | 0 | $0 | 0.00% | −11,635−100.0% | Sold out |
| LPL Financial LLC | 0 | $0 | 0.00% | −10,900−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −10,572−100.0% | Sold out |
| Federated Hermes, Inc. | 0 | $0 | 0.00% | −2,730−100.0% | Sold out |
| Antipodes Partners Ltd | 0 | $0 | 0.00% | −2,559−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −2,466−100.0% | Sold out |
| Rockefeller Capital Management L.P. | 0 | $0 | 0.00% | −1,000−100.0% | Sold out |
| Aster Capital Management (DIFC) Ltd | 0 | $0 | 0.00% | −651−100.0% | Sold out |
| Daiwa Securities Group Inc. | 0 | $0 | 0.00% | −296−100.0% | Sold out |
| Torren Management, LLC | 0 | $0 | 0.00% | −122−100.0% | Sold out |
| Dunhill Financial, LLC | 0 | $0 | 0.00% | −1−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Norges Bank | – | – | – | – | Not filed |
| Oracle Investment Management Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |