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 |
|---|---|---|---|---|---|
| Manufacturers Life Insurance Company, The | 36,186 | $775.8K | 0.00% | +11,943+49.3% | Added |
| STRS Ohio | 37,900 | $812.6K | 0.00% | +9,800+34.9% | Added |
| HRT Financial LP | 37,944 | $813.0K | 0.00% | −412,994−91.6% | Reduced |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 40,315 | $864.4K | 0.00% | +1,795+4.7% | Added |
| Mirae Asset Global ETFs Holdings Ltd. | 40,964 | $878.2K | 0.00% | −4,649−10.2% | Reduced |
| Two Sigma Investments, LP | 41,500 | $889.8K | 0.00% | +41,500 | New |
| Blackstone Group Inc. | 41,567 | $891.2K | 0.00% | +41,567 | New |
| Fisher Asset Management, LLC | 43,698 | $936.9K | 0.00% | −148,125−77.2% | Reduced |
| MetLife Investment Management | 44,101 | $945.5K | 0.00% | +437+1.0% | Added |
| ADAR1 Capital Management, LLC | 49,923 | $1.07M | 0.06% | +49,923 | New |
| Vanguard Asset Management, Ltd | 50,545 | $1.08M | 0.00% | +50,545 | New |
| Legal & General Group Plc | 51,763 | $1.11M | 0.00% | −11,905−18.7% | Reduced |
| Mariner, LLC | 52,342 | $1.12M | 0.00% | +21,175+67.9% | Added |
| Franklin Resources Inc | 52,623 | $1.13M | 0.00% | −103−0.2% | Reduced |
| Timothy G. Youngquist 2020 Irrevocable Trust | 53,399 | $1.14M | 0.56% | +53,399 | New |
| Wells Fargo & Company | 56,429 | $1.21M | 0.00% | −58,287−50.8% | Reduced |
| Prelude Capital Management, LLC | 56,673 | $1.22M | 0.09% | +56,673 | New |
| Susquehanna Portfolio Strategies, LLC | 57,379 | $1.23M | 0.02% | 00.0% | Unchanged |
| Rafferty Asset Management, LLC | 59,207 | $1.27M | 0.01% | −97,803−62.3% | Reduced |
| Mint Tower Capital Management B.V. | 60,000 | $1.29M | 0.13% | +60,000 | New |
| Simplex Trading, LLC | 64,464 | $1.38M | 0.04% | +64,464 | New |
| Deutsche Bank AG | 66,445 | $1.42M | 0.00% | +9,435+16.5% | Added |
| California State Teachers Retirement System | 67,463 | $1.45M | 0.00% | −4,756−6.6% | Reduced |
| Harvest Management LLC | 75,000 | $1.61M | 0.86% | +75,000 | New |
| Aquatic Capital Management LLC | 78,379 | $1.68M | 0.05% | +71,544+1,046.7% | Added |
| Alps Advisors Inc | 84,092 | $1.80M | 0.01% | −212−0.3% | Reduced |
| Gardner Lewis Asset Management L P | 84,768 | $1.82M | 0.39% | +84,768 | New |
| American Century Companies Inc | 88,278 | $1.89M | 0.00% | +9,353+11.9% | Added |
| Oxford Asset Management LLP | 99,747 | $2.14M | 0.86% | +99,747 | New |
| Virtus Investment Advisers, Inc. | 100,990 | $2.17M | 0.60% | +19,243+23.5% | Added |
| Maven Securities LTD | 103,900 | $2.23M | 0.13% | +103,900 | New |
| SEI Investments Co | 104,598 | $2.24M | 0.00% | +67,084+178.8% | Added |
| Nomura Asset Management International Inc. | 110,000 | $2.36M | 0.00% | 00.0% | Unchanged |
| Sagefield Capital LP | 110,199 | $2.36M | 0.17% | +110,199 | New |
| Rhumbline Advisers | 118,557 | $2.54M | 0.00% | +6,878+6.2% | Added |
| Price T Rowe Associates Inc | 119,288 | $2.56M | 0.00% | +16,832+16.4% | Added |
| SG Americas Securities, LLC | 122,922 | $2.63M | 0.00% | −227,170−64.9% | Reduced |
| Versor Investments LP | 123,673 | $2.65M | 6.49% | +123,673 | New |
| Credit Industriel Et Commercial | 135,420 | $2.90M | 0.46% | +135,420 | New |
| UBS Asset Management Americas Inc | 136,991 | $2.94M | 0.00% | +12,569+10.1% | Added |
| Swiss National Bank | 141,500 | $3.03M | 0.00% | 00.0% | Unchanged |
| Massachusetts Financial Services Co | 147,012 | $3.15M | 0.00% | −3,913−2.6% | Reduced |
| Skandinaviska Enskilda Banken AB (publ) | 150,000 | $3.22M | 0.07% | +150,000 | New |
| Invesco Ltd. | 159,898 | $3.43M | 0.00% | +35,904+29.0% | Added |
| Slotnik Capital, LLC | 166,837 | $3.58M | 1.06% | +166,837 | New |
| Groupe la Francaise | 179,495 | $3.85M | 0.05% | +179,495 | New |
| Eversept Partners, LP | 183,902 | $3.94M | 0.26% | +183,902 | New |
| Woodline Partners LP | 189,057 | $4.05M | 0.02% | +189,057 | 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 |
| Abc Arbitrage SA | 228,817 | $4.91M | 0.65% | +228,817 | New |
| Bank of New York Mellon Corp | 231,043 | $4.95M | 0.00% | +19,497+9.2% | Added |
| 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 |
| Gabelli & Co Investment Advisers, Inc. | 325,350 | $6.98M | 1.03% | +325,350 | New |
| Marshall Wace, LLP | 328,638 | $7.05M | 0.01% | +328,638 | New |
| BNP Paribas Arbitrage, SA | 337,767 | $7.24M | 0.00% | −115,544−25.5% | Reduced |
| LMR Partners LLP | 362,641 | $7.78M | 0.07% | +362,641 | New |
| Hennion & Walsh Asset Management, Inc. | 367,134 | $7.87M | 0.26% | +53,679+17.1% | Added |
| Squarepoint Ops LLC | 415,706 | $8.91M | 0.02% | +315,094+313.2% | Added |
| Kennedy Capital Management, Inc. | 436,732 | $9.36M | 0.20% | −106,116−19.5% | Reduced |
| AQR Capital Management LLC | 444,467 | $9.53M | 0.00% | +12,709+2.9% | Added |
| Cinctive Capital Management LP | 450,000 | $9.65M | 0.63% | +450,000 | New |
| Gabelli Funds LLC | 464,097 | $9.95M | 0.07% | +464,097 | New |
| Susquehanna International Group, LLP | 473,543 | $10.2M | 0.01% | −264,117−35.8% | Reduced |
| Jane Street Group, LLC | 475,436 | $10.2M | 0.01% | −369,718−43.7% | Reduced |
| Vanguard Fiduciary Trust Co | 478,839 | $10.3M | 0.00% | +478,839 | New |
| Jump Financial, LLC | 497,365 | $10.7M | 0.16% | −169,755−25.4% | Reduced |
| Beryl Capital Management LLC | 514,114 | $11.0M | 10.15% | +514,114 | New |
| Alliancebernstein L.P. | 1,214,783 | $11.3M | 0.00% | +1,146,993+1,692.0% | Added |
| Janus Henderson Group PLC | 546,428 | $11.7M | 0.01% | +525,128+2,465.4% | Added |
| TIG Advisors, LLC | 613,918 | $13.2M | 0.63% | +613,918 | New |
| Charles Schwab Investment Management Inc | 617,561 | $13.2M | 0.00% | −16,133−2.5% | Reduced |
| Polar Asset Management Partners Inc. | 630,410 | $13.5M | 0.32% | +630,410 | New |
| Healthcare of Ontario Pension Plan Trust Fund | 643,738 | $13.8M | 0.02% | +643,738 | New |
| Magnetar Financial LLC | 645,173 | $13.8M | 0.14% | +645,173 | New |
| Northern Trust Corp | 666,180 | $14.3M | 0.00% | +49,145+8.0% | Added |
| Hudson Bay Capital Management LP | 670,000 | $14.4M | 0.09% | −1,030,000−60.6% | Reduced |
| Morgan Stanley | 687,107 | $14.7M | 0.00% | −863,167−55.7% | Reduced |
| Pentwater Capital Management LP | 800,000 | $17.2M | 0.12% | +800,000 | New |
| Dimensional Fund Advisors LP | 819,371 | $17.6M | 0.00% | −217,941−21.0% | Reduced |
| Alpine Associates Management Inc. | 925,000 | $19.8M | 1.17% | +925,000 | New |
| Water Island Capital LLC | 944,247 | $20.2M | 2.70% | +944,247 | New |
| DAFNA Capital Management LLC | 978,463 | $21.0M | 4.77% | −20,700−2.1% | Reduced |
| Goldman Sachs Group Inc | 979,238 | $21.0M | 0.00% | −526,996−35.0% | Reduced |
| Renaissance Technologies LLC | 1,296,984 | $27.8M | 0.04% | −8,100−0.6% | Reduced |
| Vivaldi Asset Management, LLC | 1,496,007 | $32.1M | 1.69% | +1,496,007 | New |
| Soros Fund Management LLCSuperinvestorSoros Fund Management | 1,539,100 | $33.0M | 0.45% | +1,539,100 | New |
| Oddo BHF Asset Management SAS | 1,550,000 | $33.2M | 1.31% | +1,550,000 | New |
| Perceptive Advisors LLC | 1,755,799 | $37.6M | 0.74% | +1,755,799 | New |
| Nuveen, LLC | 1,823,998 | $39.1M | 0.01% | +1,301,543+249.1% | Added |
| O'Connor Alternative Investments LLC | 1,867,553 | $40.0M | 2.10% | +1,867,553 | New |
| Bank of America Corp | 1,902,868 | $40.8M | 0.00% | +819,050+75.6% | Added |
| Millennium Management LLC | 1,927,557 | $41.3M | 0.03% | +577,638+42.8% | Added |
| Qube Research & Technologies Ltd | 1,954,552 | $41.9M | 0.06% | +467,990+31.5% | Added |
| Geode Capital Management, LLC | 1,954,735 | $41.9M | 0.00% | +76,897+4.1% | Added |
| Vanguard Portfolio Management LLC | 2,095,813 | $44.9M | 0.00% | +2,095,813 | New |
| UBS Group AG | 2,305,123 | $49.4M | 0.01% | +2,134,395+1,250.2% | Added |
| CNH Partners LLC | 2,462,154 | $52.8M | 0.87% | +2,462,154 | New |
| Balyasny Asset Management LLC | 2,625,235 | $56.3M | 0.11% | +1,135,311+76.2% | Added |