Day One Biopharmaceuticals IDAWN
13F holders, Q3 2025 (September 30)172holders −2
32new positions
31sold out
7famous investors
$7.05avg. 13F price*
At the end of Q3 2025, 172 institutions reported holding Day One Biopharmaceuticals I (DAWN) in their 13F filings, down 2 from Q2 2025. 32 opened new positions and 31 sold out. The largest holders were FMR LLC ($71.2M), BlackRock, Inc. ($63.5M) and Atlas Venture Life Science Advisors, LLC ($45.3M). 7 famous investors held it, including Jim Simons / Peter Brown (0.0% of Renaissance Technologies's portfolio), Israel Englander (0.0% of Millennium Management's portfolio) and Ken Griffin (0.0% of Citadel Advisors's portfolio).
- Company
- Day One Biopharmaceuticals I
- CUSIP
- 23954D109
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025 → Q3 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 32 | $64.2M |
| Exits | 31 | $28.6M |
All 13F filers, Q2 2025 → Q3 2025: 13,356,871 shares bought and 13,841,568 shares sold, net −484,697 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 172 holders
| FMR LLC | 0.00% | Reduce -11.0% | 10,097,668 | $71.2M |
| BlackRock, Inc. | 0.00% | Reduce -8.4% | 9,001,455 | $63.5M |
| Atlas Venture Life Science Advisors, LLC | 6.02% | No change | 6,430,257 | $45.3M |
| Vanguard Group Inc. | 0.00% | Add +0.1% | 6,181,329 | $43.6M |
| Deerfield Management Company, L.P. | 0.55% | Add +26.4% | 4,705,413 | $33.2M |
| Franklin Resources Inc. | 0.01% | Reduce -15.2% | 3,477,026 | $24.5M |
| Rubric Capital Management LP | 0.32% | New | 3,377,071 | $23.8M |
| State Street Corp. | 0.00% | Add +20.5% | 3,240,444 | $22.8M |
| Vestal Point Capital, LP | 0.86% | Reduce -10.8% | 2,675,000 | $18.9M |
| Pictet Asset Management Holding SA | 0.02% | Reduce -36.3% | 2,373,133 | $16.7M |
| Alyeska Investment Group, L.P. | 0.05% | Reduce -26.6% | 2,212,187 | $15.6M |
| Braidwell LP | 0.62% | No change | 2,181,598 | $15.4M |
| Geode Capital Management, LLC | 0.00% | Add +2.9% | 1,761,264 | $12.4M |
| AIGH Capital Management LLC | 3.75% | New | 1,520,492 | $10.7M |
| Mak Capital One LLC | 2.04% | New | 1,448,461 | $10.2M |
| Balyasny Asset Management L.P. | 0.02% | New | 1,384,047 | $9.8M |
| Goldman Sachs Group Inc. | 0.00% | Reduce -18.9% | 1,371,437 | $9.7M |
| Hudson Bay Capital Management LP | 0.07% | Add +1.8% | 1,320,000 | $9.3M |
| Algert Global LLC | 0.16% | Add +45.4% | 1,317,042 | $9.3M |
| Morgan Stanley | 0.00% | Reduce -3.6% | 1,304,029 | $9.2M |
| Dimensional Fund Advisors LP | 0.00% | Reduce -13.6% | 1,223,284 | $8.6M |
| Bank of America Corp. | 0.00% | Add +23.4% | 1,191,851 | $8.4M |
| Qube Research & Technologies Ltd | 0.01% | Add +23.7% | 1,167,669 | $8.2M |
| DAFNA Capital Management LLC | 1.76% | Add +13.7% | 999,163 | $7.0M |
| Renaissance Technologies | 0.01% | Reduce -9.5% | 905,476 | $6.4M |
| Millennium Management | 0.00% | Reduce -42.6% | 693,320 | $4.9M |
| Citadel Advisors | 0.00% | Reduce -5.8% | 663,213 | $4.7M |
| Stonepine Capital Management, LLC | 3.71% | Add +43.9% | 647,382 | $4.6M |
| Northern Trust Corp. | 0.00% | Add +3.0% | 629,592 | $4.4M |
| Charles Schwab Investment Management Inc. | 0.00% | Add +5.4% | 610,064 | $4.3M |
| J. Goldman & Co LP | 0.15% | Add +2.2% | 569,619 | $4.0M |
| Kennedy Capital Management LLC | 0.08% | Add +19.1% | 540,384 | $3.8M |
| Barclays PLC | 0.00% | Reduce -0.3% | 347,185 | $2.4M |
| HRT Financial LP | 0.01% | New | 321,377 | $2.3M |
| Bank of New York Mellon Corp | 0.00% | Reduce -0.5% | 306,180 | $2.2M |
| Pale Fire Capital SE | 0.23% | Add +768.1% | 302,467 | $2.1M |
| Parkman Healthcare Partners LLC | 0.23% | Reduce -39.6% | 301,746 | $2.1M |
| Jane Street Group, LLC | 0.00% | New | 279,344 | $2.0M |
| Parkwood LLC | 0.19% | No change | 275,000 | $1.9M |
| Jump Financial, LLC | 0.03% | New | 272,547 | $1.9M |
| BNP Paribas Financial Markets | 0.00% | Add +113.8% | 268,288 | $1.9M |
| Schroder Investment Management Group | 0.00% | Add +50.0% | 270,217 | $1.9M |
| Trexquant Investment LP | 0.02% | Add +130.9% | 266,580 | $1.9M |
| Fisher Asset Management | 0.00% | Reduce -0.8% | 220,163 | $1.6M |
| UBS Group AG | 0.00% | Add +134.4% | 209,717 | $1.5M |
| AlphaQuest LLC | 0.09% | Add +1065.6% | 185,006 | $1.3M |
| Sphera Funds Management LTD. | 0.29% | No change | 175,371 | $1.2M |
| Nuveen, LLC | 0.00% | No change | 150,372 | $1.1M |
| Russell Investments Group, Ltd. | 0.00% | Add +4.8% | 150,349 | $1.1M |
| National Philanthropic Trust | 0.01% | No change | 150,000 | $1.1M |
| Susquehanna Fundamental Investments, LLC | 0.04% | Reduce -47.4% | 138,420 | $976K |
| Knott David M Jr | 0.39% | Add +287.1% | 130,500 | $920K |
| Rafferty Asset Management, LLC | 0.00% | Add +29.3% | 127,580 | $899K |
| Swiss National Bank | 0.00% | No change | 125,800 | $887K |
| Rhumbline Advisers | 0.00% | Add +5.1% | 121,945 | $860K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.00% | Reduce -33.7% | 116,245 | $820K |
| Macquarie Group Ltd. | 0.00% | No change | 110,000 | $776K |
| HSBC Holdings PLC | 0.00% | Reduce -16.6% | 109,781 | $772K |
| AQR Capital Management | 0.00% | Reduce -61.2% | 108,477 | $765K |
| Los Angeles Capital Management LLC | 0.00% | Add +20.2% | 98,889 | $697K |
| Invesco Ltd. | 0.00% | Add +43.1% | 98,042 | $691K |
| Hennion & Walsh Asset Management, Inc. | 0.02% | Reduce -1.8% | 95,072 | $670K |
| Susquehanna Portfolio Strategies, LLC | 0.01% | New | 92,555 | $653K |
| Man Group plc | 0.00% | Add +61.5% | 91,818 | $647K |
| Dynamic Technology Lab Private Ltd | 0.10% | Add +5.2% | 87,541 | $618K |
| Perkins Capital Management Inc. | 0.51% | New | 82,250 | $580K |
| Wells Fargo & Company | 0.00% | Add +12.3% | 81,468 | $574K |
| T. Rowe Price Associates Inc. | 0.00% | Reduce -92.9% | 79,733 | $563K |
| XTX Topco Ltd | 0.03% | Add +224.9% | 78,848 | $556K |
| D. E. Shaw & Co. | 0.00% | Reduce -4.1% | 77,972 | $550K |
| California State Teachers Retirement System | 0.00% | Add +28.1% | 71,894 | $507K |
| Alliancebernstein L.P. | 0.00% | No change | 67,790 | $478K |
| Virtus Investment Advisers, LLC | 0.13% | No change | 66,427 | $468K |
| JPMorgan Chase & Co. | 0.00% | Reduce -26.3% | 65,682 | $463K |
| ExodusPoint Capital Management, LP | 0.01% | Reduce -81.0% | 60,921 | $429K |
| Legal & General Group Plc | 0.00% | No change | 56,864 | $401K |
| Erste Asset Management GmbH | 0.00% | No change | 51,200 | $358K |
| GC Wealth Management RIA, LLC | 0.01% | Reduce -37.5% | 50,000 | $353K |
| Tudor Investment Corporation | 0.00% | Add +36.1% | 49,550 | $349K |
| Alps Advisors Inc. | 0.00% | Reduce -10.4% | 49,035 | $346K |
| Royal Bank of Canada | 0.00% | Reduce -74.8% | 43,999 | $310K |
| PharVision Advisers, LLC | 0.17% | New | 42,345 | $299K |
| Lion Point Capital, LP | 1.68% | New | 42,000 | $296K |
| Deutsche Bank AG | 0.00% | Reduce -87.2% | 41,504 | $293K |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.00% | Reduce -9.0% | 40,278 | $284K |
| Cetera Investment Advisers | 0.00% | Add +66.9% | 39,550 | $279K |
| Diametric Capital, LP | 0.10% | Reduce -23.0% | 38,465 | $271K |
| Oxford Asset Management LLP | 0.09% | New | 38,463 | $271K |
| MetLife Investment Management, LLC | 0.00% | Reduce -15.7% | 37,478 | $264K |
| Osaic Holdings, Inc. | 0.00% | Add +13.4% | 37,295 | $261K |
| American Century Companies Inc. | 0.00% | Add +23.9% | 33,865 | $239K |
| Martingale Asset Management L P | 0.01% | Reduce -3.7% | 33,700 | $238K |
| DRW Securities, LLC | 0.01% | Reduce -42.5% | 33,265 | $233K |
| Intech Investment Management LLC | 0.00% | Reduce -31.1% | 31,268 | $220K |
| Susquehanna International Group, LLP | 0.00% | Reduce -71.3% | 28,854 | $203K |
| ADAR1 Capital Management, LLC | 0.02% | No change | 28,023 | $198K |
| Profund Advisors LLC | 0.01% | Add +31.9% | 27,635 | $195K |
| State of Wisconsin Investment Board | 0.00% | Reduce -80.2% | 26,992 | $190K |
| SG Americas Securities, LLC | 0.00% | New | 26,345 | $186K |
| Creative Planning | 0.00% | Add +41.5% | 26,196 | $185K |
"% of holder's portfolio" is DAWN's weight in each manager's 13F, not the share of Day One Biopharmaceuticals I the manager owns.