Day One Biopharmaceuticals, Inc.
DAWNDelisted- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001845337
Day One Biopharmaceuticals, Inc. was delisted in 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 | $758.9M |
| Q3 2025 | 173 | $603.9M |
| Q2 2025 | 174 | $562.2M |
| Q1 2025 | 184 | $747.2M |
| Q4 2024 | 164 | $1.19B |
| Q3 2024 | 166 | $1.28B |
| Q2 2024 | 157 | $1.03B |
| Q1 2024 | 148 | $1.21B |
| Q4 2023 | 139 | $1.12B |
| Q3 2023 | 130 | $951.5M |
| Q2 2023 | 140 | $941.0M |
| Q1 2023 | 126 | $938.2M |
| Q4 2022 | 109 | $1.30B |
| Q3 2022 | 93 | $1.21B |
| Q2 2022 | 87 | $1.06B |
| Q1 2022 | 66 | $429.6M |
| Q4 2021 | 58 | $707.6M |
| Q3 2021 | 45 | $452.9M |
| Q2 2021 | 33 | $418.3M |
| 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 |
|---|---|---|---|---|---|
| BlackRock, Inc. | 7,044,487 | $151.0M | 0.00% | −1,793,087−20.3% | Reduced |
| Glazer Capital, LLC | 4,683,687 | $100.4M | 2.13% | +4,683,687 | New |
| FIL Ltd | 4,131,907 | $88.6M | 0.07% | +4,131,907 | New |
| Kryger Capital LLC | 3,896,485 | $83.5M | 5.91% | +3,896,485 | New |
| Deerfield Management Company, L.P. (Series C) | 3,723,131 | $79.8M | 0.94% | 00.0% | Unchanged |
| Vanguard Capital Management LLC | 3,357,684 | $72.0M | 0.00% | +3,357,684 | New |
| JPMorgan Chase & Co | 3,134,753 | $67.1M | 0.00% | +3,091,223+7,101.4% | Added |
| State Street Corp | 2,869,876 | $61.5M | 0.00% | −1,419,690−33.1% | Reduced |
| Balyasny Asset Management LLC | 2,625,235 | $56.3M | 0.11% | +1,135,311+76.2% | Added |
| CNH Partners LLC | 2,462,154 | $52.8M | 0.87% | +2,462,154 | New |
| UBS Group AG | 2,305,123 | $49.4M | 0.01% | +2,134,395+1,250.2% | Added |
| Vanguard Portfolio Management LLC | 2,095,813 | $44.9M | 0.00% | +2,095,813 | New |
| Geode Capital Management, LLC | 1,954,735 | $41.9M | 0.00% | +76,897+4.1% | Added |
| Qube Research & Technologies Ltd | 1,954,552 | $41.9M | 0.06% | +467,990+31.5% | Added |
| Millennium Management LLC | 1,927,557 | $41.3M | 0.03% | +577,638+42.8% | Added |
| Bank of America Corp | 1,902,868 | $40.8M | 0.00% | +819,050+75.6% | Added |
| O'Connor Alternative Investments LLC | 1,867,553 | $40.0M | 2.10% | +1,867,553 | New |
| Nuveen, LLC | 1,823,998 | $39.1M | 0.01% | +1,301,543+249.1% | Added |
| Perceptive Advisors LLC | 1,755,799 | $37.6M | 0.74% | +1,755,799 | New |
| Oddo BHF Asset Management SAS | 1,550,000 | $33.2M | 1.31% | +1,550,000 | New |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 1,539,100 | $33.0M | 0.45% | +1,539,100 | New |
| Vivaldi Asset Management, LLC | 1,496,007 | $32.1M | 1.69% | +1,496,007 | New |
| Renaissance Technologies LLC | 1,296,984 | $27.8M | 0.04% | −8,100−0.6% | Reduced |
| Goldman Sachs Group Inc | 979,238 | $21.0M | 0.00% | −526,996−35.0% | Reduced |
| DAFNA Capital Management LLC | 978,463 | $21.0M | 4.77% | −20,700−2.1% | Reduced |
| Water Island Capital LLC | 944,247 | $20.2M | 2.70% | +944,247 | New |
| Alpine Associates Management Inc. | 925,000 | $19.8M | 1.17% | +925,000 | New |
| Dimensional Fund Advisors LP | 819,371 | $17.6M | 0.00% | −217,941−21.0% | Reduced |
| Pentwater Capital Management LP | 800,000 | $17.2M | 0.12% | +800,000 | New |
| Morgan Stanley | 687,107 | $14.7M | 0.00% | −863,167−55.7% | Reduced |
| Hudson Bay Capital Management LP | 670,000 | $14.4M | 0.09% | −1,030,000−60.6% | Reduced |
| Northern Trust Corp | 666,180 | $14.3M | 0.00% | +49,145+8.0% | Added |
| Magnetar Financial LLC | 645,173 | $13.8M | 0.14% | +645,173 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 643,738 | $13.8M | 0.02% | +643,738 | New |
| Polar Asset Management Partners Inc. | 630,410 | $13.5M | 0.32% | +630,410 | New |
| Charles Schwab Investment Management Inc | 617,561 | $13.2M | 0.00% | −16,133−2.5% | Reduced |
| TIG Advisors, LLC | 613,918 | $13.2M | 0.63% | +613,918 | New |
| Janus Henderson Group PLC | 546,428 | $11.7M | 0.01% | +525,128+2,465.4% | Added |
| Alliancebernstein L.P. | 1,214,783 | $11.3M | 0.00% | +1,146,993+1,692.0% | Added |
| Beryl Capital Management LLC | 514,114 | $11.0M | 10.15% | +514,114 | New |
| Jump Financial, LLC | 497,365 | $10.7M | 0.16% | −169,755−25.4% | Reduced |
| Vanguard Fiduciary Trust Co | 478,839 | $10.3M | 0.00% | +478,839 | New |
| Jane Street Group, LLC | 475,436 | $10.2M | 0.01% | −369,718−43.7% | Reduced |
| Susquehanna International Group, LLP | 473,543 | $10.2M | 0.01% | −264,117−35.8% | Reduced |
| Gabelli Funds LLC | 464,097 | $9.95M | 0.07% | +464,097 | New |
| Cinctive Capital Management LP | 450,000 | $9.65M | 0.63% | +450,000 | New |
| AQR Capital Management LLC | 444,467 | $9.53M | 0.00% | +12,709+2.9% | Added |
| Kennedy Capital Management, Inc. | 436,732 | $9.36M | 0.20% | −106,116−19.5% | Reduced |
| Squarepoint Ops LLC | 415,706 | $8.91M | 0.02% | +315,094+313.2% | Added |
| Hennion & Walsh Asset Management, Inc. | 367,134 | $7.87M | 0.26% | +53,679+17.1% | Added |
| LMR Partners LLP | 362,641 | $7.78M | 0.07% | +362,641 | New |
| BNP Paribas Arbitrage, SA | 337,767 | $7.24M | 0.00% | −115,544−25.5% | Reduced |
| Marshall Wace, LLP | 328,638 | $7.05M | 0.01% | +328,638 | New |
| Gabelli & Co Investment Advisers, Inc. | 325,350 | $6.98M | 1.03% | +325,350 | New |
| Public Sector Pension Investment Board | 236,000 | $5.06M | 0.02% | +236,000 | New |
| Capstone Investment Advisors, LLC | 236,000 | $5.06M | 0.04% | +236,000 | New |
| Bank of New York Mellon Corp | 231,043 | $4.95M | 0.00% | +19,497+9.2% | Added |
| Abc Arbitrage SA | 228,817 | $4.91M | 0.65% | +228,817 | New |
| Man Group plc | 200,000 | $4.29M | 0.01% | +2,904+1.5% | Added |
| Alberta Investment Management Corp | 200,000 | $4.29M | 0.03% | +200,000 | New |
| Woodline Partners LP | 189,057 | $4.05M | 0.02% | +189,057 | New |
| Eversept Partners, LP | 183,902 | $3.94M | 0.26% | +183,902 | New |
| Groupe la Francaise | 179,495 | $3.85M | 0.05% | +179,495 | New |
| Slotnik Capital, LLC | 166,837 | $3.58M | 1.06% | +166,837 | New |
| Invesco Ltd. | 159,898 | $3.43M | 0.00% | +35,904+29.0% | Added |
| Skandinaviska Enskilda Banken AB (publ) | 150,000 | $3.22M | 0.07% | +150,000 | New |
| Massachusetts Financial Services Co | 147,012 | $3.15M | 0.00% | −3,913−2.6% | Reduced |
| Swiss National Bank | 141,500 | $3.03M | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 136,991 | $2.94M | 0.00% | +12,569+10.1% | Added |
| Credit Industriel Et Commercial | 135,420 | $2.90M | 0.46% | +135,420 | New |
| Versor Investments LP | 123,673 | $2.65M | 6.49% | +123,673 | New |
| SG Americas Securities, LLC | 122,922 | $2.63M | 0.00% | −227,170−64.9% | Reduced |
| Price T Rowe Associates Inc | 119,288 | $2.56M | 0.00% | +16,832+16.4% | Added |
| Rhumbline Advisers | 118,557 | $2.54M | 0.00% | +6,878+6.2% | Added |
| Sagefield Capital LP | 110,199 | $2.36M | 0.17% | +110,199 | New |
| Nomura Asset Management International Inc. | 110,000 | $2.36M | 0.00% | 00.0% | Unchanged |
| SEI Investments Co | 104,598 | $2.24M | 0.00% | +67,084+178.8% | Added |
| Maven Securities LTD | 103,900 | $2.23M | 0.13% | +103,900 | New |
| Virtus Investment Advisers, Inc. | 100,990 | $2.17M | 0.60% | +19,243+23.5% | Added |
| Oxford Asset Management LLP | 99,747 | $2.14M | 0.86% | +99,747 | New |
| American Century Companies Inc | 88,278 | $1.89M | 0.00% | +9,353+11.9% | Added |
| Gardner Lewis Asset Management L P | 84,768 | $1.82M | 0.39% | +84,768 | New |
| Alps Advisors Inc | 84,092 | $1.80M | 0.01% | −212−0.3% | Reduced |
| Aquatic Capital Management LLC | 78,379 | $1.68M | 0.05% | +71,544+1,046.7% | Added |
| Harvest Management LLC | 75,000 | $1.61M | 0.86% | +75,000 | New |
| California State Teachers Retirement System | 67,463 | $1.45M | 0.00% | −4,756−6.6% | Reduced |
| Deutsche Bank AG | 66,445 | $1.42M | 0.00% | +9,435+16.5% | Added |
| Simplex Trading, LLC | 64,464 | $1.38M | 0.04% | +64,464 | New |
| Mint Tower Capital Management B.V. | 60,000 | $1.29M | 0.12% | +60,000 | New |
| Rafferty Asset Management, LLC | 59,207 | $1.27M | 0.01% | −97,803−62.3% | Reduced |
| Susquehanna Portfolio Strategies, LLC | 57,379 | $1.23M | 0.02% | 00.0% | Unchanged |
| Prelude Capital Management, LLC | 56,673 | $1.22M | 0.09% | +56,673 | New |
| Wells Fargo & Company | 56,429 | $1.21M | 0.00% | −58,287−50.8% | Reduced |
| Timothy G. Youngquist 2020 Irrevocable Trust | 53,399 | $1.14M | 0.56% | +53,399 | New |
| Franklin Resources Inc | 52,623 | $1.13M | 0.00% | −103−0.2% | Reduced |
| Mariner, LLC | 52,342 | $1.12M | 0.00% | +21,175+67.9% | Added |
| Legal & General Group Plc | 51,763 | $1.11M | 0.00% | −11,905−18.7% | Reduced |
| Vanguard Asset Management, Ltd | 50,545 | $1.08M | 0.00% | +50,545 | New |
| ADAR1 Capital Management, LLC | 49,923 | $1.07M | 0.06% | +49,923 | New |
| MetLife Investment Management | 44,101 | $945.5K | 0.00% | +437+1.0% | Added |