Day One Biopharmaceuticals, Inc. (DAWN) — Institutional Holders, Q2 2026
1 institutional investment managers reported a DAWN position on SEC Form 13F-HR for the quarter ended June 30, 2026, with a combined reported value of $3.6K. Every filer is listed below, ranked by position value. Put and call option positions are excluded, and a firm filing several lots or share classes is shown once with its total.
DAWN in Q2 2026: what funds did
Funds that filed a 13F for both Q1 2026 and Q2 2026, by what they did with the common stock. Share counts are adjusted for any split between the two quarters; dollar figures are the change in shares at this quarter’s price.
Biggest buyers
None this quarter.
Biggest sellers
- BlackRockSold out · -7,044,487 sh-$151.6M
- GLAZER CAPITALSold out · -4,683,687 sh-$100.8M
- FIL LtdSold out · -4,131,907 sh-$88.9M
- Kryger CapitalSold out · -3,896,485 sh-$83.9M
- DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)Sold out · -3,723,131 sh-$80.1M
DAWN 13F holders ranked 1–1 of 1
| # | Institution | Shares | Value | % of portfolio | QoQShares vs Q1 2026 |
|---|---|---|---|---|---|
| 1 | IFP Advisors#1 · 165 sh | 165 | $3.6K | — | -74.2% |
Funds that sold out of DAWN in Q2 2026 (205)
Held DAWN at the end of Q1 2026 and filed a Q2 2026 13F without it. Not in the list above, because they no longer hold it. Largest prior position first.
| Institution | Shares sold | Value in Q1 2026 |
|---|---|---|
| BlackRock7,044,487 sh | 7,044,487 | $151.0M |
| GLAZER CAPITAL4,683,687 sh | 4,683,687 | $100.4M |
| FIL Ltd4,131,907 sh | 4,131,907 | $88.6M |
| Kryger Capital3,896,485 sh | 3,896,485 | $83.5M |
| DEERFIELD MANAGEMENT COMPANY, L.P. (SERIES C)3,723,131 sh | 3,723,131 | $79.8M |
| VANGUARD CAPITAL MANAGEMENT3,357,684 sh | 3,357,684 | $72.0M |
| JPMORGAN CHASE3,134,753 sh | 3,134,753 | $67.1M |
| STATE STREET2,869,876 sh | 2,869,876 | $61.5M |
| BALYASNY ASSET MANAGEMENT L.P.2,625,235 sh | 2,625,235 | $56.3M |
| AQR Arbitrage2,462,154 sh | 2,462,154 | $52.8M |
| UBS Group AG2,305,123 sh | 2,305,123 | $49.4M |
| VANGUARD PORTFOLIO MANAGEMENT2,095,813 sh | 2,095,813 | $44.9M |
| GEODE CAPITAL MANAGEMENT1,954,735 sh | 1,954,735 | $41.9M |
| Qube Research & Technologies Ltd1,954,552 sh | 1,954,552 | $41.9M |
| MILLENNIUM MANAGEMENT1,927,557 sh | 1,927,557 | $41.3M |
| BANK OF AMERICA1,902,868 sh | 1,902,868 | $40.8M |
| O'Connor Alternative Investments1,867,553 sh | 1,867,553 | $40.0M |
| Nuveen1,823,998 sh | 1,823,998 | $39.1M |
| PERCEPTIVE ADVISORS1,755,799 sh | 1,755,799 | $37.6M |
| ODDO BHF ASSET MANAGEMENT SAS1,550,000 sh | 1,550,000 | $33.2M |
| SOROS FUND MANAGEMENT1,539,100 sh | 1,539,100 | $33.0M |
| First Capital Management L.P.1,496,007 sh | 1,496,007 | $32.1M |
| RENAISSANCE TECHNOLOGIES1,296,984 sh | 1,296,984 | $27.8M |
| GOLDMAN SACHS GROUP979,238 sh | 979,238 | $21.0M |
| DAFNA Capital Management978,463 sh | 978,463 | $21.0M |
| WATER ISLAND CAPITAL944,247 sh | 944,247 | $20.2M |
| ALPINE ASSOCIATES MANAGEMENT925,000 sh | 925,000 | $19.8M |
| DIMENSIONAL FUND ADVISORS819,371 sh | 819,371 | $17.6M |
| Pentwater Capital Management800,000 sh | 800,000 | $17.2M |
| MORGAN STANLEY687,107 sh | 687,107 | $14.7M |
| Hudson Bay Capital Management670,000 sh | 670,000 | $14.4M |
| NORTHERN666,180 sh | 666,180 | $14.3M |
| Magnetar Financial645,173 sh | 645,173 | $13.8M |
| HEALTHCARE OF ONTARIO PENSION PLAN FUND643,738 sh | 643,738 | $13.8M |
| Polar Asset Management Partners630,410 sh | 630,410 | $13.5M |
| CHARLES SCHWAB INVESTMENT MANAGEMENT617,561 sh | 617,561 | $13.2M |
| TIG Advisors613,918 sh | 613,918 | $13.2M |
| ALLIANCEBERNSTEIN L.P.1,214,783 sh | 1,214,783 | $11.3M |
| Beryl Capital Management514,114 sh | 514,114 | $11.0M |
| Jump Financial497,365 sh | 497,365 | $10.7M |
| VANGUARD FIDUCIARY478,839 sh | 478,839 | $10.3M |
| JANE STREET GROUP475,436 sh | 475,436 | $10.2M |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP473,543 sh | 473,543 | $10.2M |
| GABELLI FUNDS464,097 sh | 464,097 | $10.0M |
| Cinctive Capital Management450,000 sh | 450,000 | $9.6M |
| AQR CAPITAL MANAGEMENT444,467 sh | 444,467 | $9.5M |
| KENNEDY CAPITAL MANAGEMENT436,732 sh | 436,732 | $9.4M |
| Squarepoint Ops415,706 sh | 415,706 | $8.9M |
| Hennion & Walsh Asset Management367,134 sh | 367,134 | $7.9M |
| LMR Partners LLP362,641 sh | 362,641 | $7.8M |
| BNP PARIBAS FINANCIAL MARKETS337,767 sh | 337,767 | $7.2M |
| MARSHALL WACE, LLP328,638 sh | 328,638 | $7.0M |
| GABELLI & INVESTMENT ADVISERS325,350 sh | 325,350 | $7.0M |
| PUBLIC SECTOR PENSION INVESTMENT BOARD236,000 sh | 236,000 | $5.1M |
| CAPSTONE INVESTMENT ADVISORS236,000 sh | 236,000 | $5.1M |
| Bank of New York Mellon231,043 sh | 231,043 | $5.0M |
| ABC ARBITRAGE SA228,817 sh | 228,817 | $4.9M |
| Alberta Investment Management200,000 sh | 200,000 | $4.3M |
| Man Group plc200,000 sh | 200,000 | $4.3M |
| Woodline Partners189,057 sh | 189,057 | $4.1M |
| Eversept Partners183,902 sh | 183,902 | $3.9M |
| Groupe la Francaise179,495 sh | 179,495 | $3.8M |
| Slotnik Capital166,837 sh | 166,837 | $3.6M |
| Invesco Ltd.159,898 sh | 159,898 | $3.4M |
| Skandinaviska Enskilda Banken AB (publ)150,000 sh | 150,000 | $3.2M |
| MASSACHUSETTS FINANCIAL SERVICES147,012 sh | 147,012 | $3.2M |
| Swiss National Bank141,500 sh | 141,500 | $3.0M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME136,991 sh | 136,991 | $2.9M |
| CREDIT INDUSTRIEL ET COMMERCIAL135,420 sh | 135,420 | $2.9M |
| Versor Investments123,673 sh | 123,673 | $2.7M |
| SG Americas Securities122,922 sh | 122,922 | $2.6M |
| PRICE T ROWE ASSOCIATES119,288 sh | 119,288 | $2.6M |
| RHUMBLINE ADVISERS118,557 sh | 118,557 | $2.5M |
| Sagefield Capital110,199 sh | 110,199 | $2.4M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL110,000 sh | 110,000 | $2.4M |
| SEI INVESTMENTS104,598 sh | 104,598 | $2.2M |
| Maven Securities LTD103,900 sh | 103,900 | $2.2M |
| Virtus Investment Advisers100,990 sh | 100,990 | $2.2M |
| OXFORD ASSET MANAGEMENT LLP99,747 sh | 99,747 | $2.1M |
| AMERICAN CENTURY COMPANIES88,278 sh | 88,278 | $1.9M |
| GARDNER LEWIS ASSET MANAGEMENT L P84,768 sh | 84,768 | $1.8M |
| ALPS ADVISORS84,092 sh | 84,092 | $1.8M |
| Aquatic Capital Management78,379 sh | 78,379 | $1.7M |
| HARVEST MANAGEMENT75,000 sh | 75,000 | $1.6M |
| DEUTSCHE BANK AG\66,445 sh | 66,445 | $1.4M |
| SIMPLEX TRADING64,464 sh | 64,464 | $1.4M |
| Mint Tower Capital Management B.V.60,000 sh | 60,000 | $1.3M |
| Rafferty Asset Management59,207 sh | 59,207 | $1.3M |
| Susquehanna Portfolio Strategies57,379 sh | 57,379 | $1.2M |
| PRELUDE CAPITAL MANAGEMENT56,673 sh | 56,673 | $1.2M |
| WELLS FARGO & COMPANY56,429 sh | 56,429 | $1.2M |
| Timothy G. Youngquist 2020 Irrevocable53,399 sh | 53,399 | $1.1M |
| FRANKLIN RESOURCES52,623 sh | 52,623 | $1.1M |
| Mariner52,342 sh | 52,342 | $1.1M |
| Legal & General Group Plc51,763 sh | 51,763 | $1.1M |
| VANGUARD ASSET MANAGEMENT, Ltd50,545 sh | 50,545 | $1.1M |
| ADAR1 Capital Management49,923 sh | 49,923 | $1.1M |
| MetLife Investment Management44,101 sh | 44,101 | $945.5K |
| Fisher Asset Management43,698 sh | 43,698 | $936.9K |
| Blackstone41,567 sh | 41,567 | $891.2K |
And 105 smaller positions.
Source: Form 13F-HR filings on SEC EDGAR, Q2 2026. Values are as reported by each manager at quarter end. “% of portfolio” is the position’s share of the manager’s total reported 13F value for the same quarter. “New” means the manager filed a 13F for Q1 2026 without this position; a dash means no comparison is available. Where a manager’s own filing is internally inconsistent its value is withheld and it is listed last. 13F data shows reported holdings, not recommendations.