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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.

Q1 2026 vs. Q4 2025

How the institutions holding Day One Biopharmaceuticals, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026All holders in Q4 2025

13F holders of DAWN: Q4 2025 compared with Q1 2026
MeasureQ4 2025Of which not filed for Q1 2026Q1 2026Change
Holders1844208+28
Shares81.4M6.55M86.9M+12.0M (+16.0%)
Value$758.4M$61.1M$1.85B+$1.15B (+165.0%)

4 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (84)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to DAWN in Q1 2026
InstitutionSharesValue% of portfolio
Glazer Capital, LLC4,683,687$100.4M2.13%
FIL Ltd4,131,907$88.6M0.07%
Kryger Capital LLC3,896,485$83.5M5.91%
Vanguard Capital Management LLC3,357,684$72.0M0.00%
CNH Partners LLC2,462,154$52.8M0.87%
Vanguard Portfolio Management LLC2,095,813$44.9M0.00%
O'Connor Alternative Investments LLC1,867,553$40.0M2.10%
Perceptive Advisors LLC1,755,799$37.6M0.74%
Oddo BHF Asset Management SAS1,550,000$33.2M1.31%
Soros Fund Management LLCSuperinvestorSoros Fund Management1,539,100$33.0M0.45%
Vivaldi Asset Management, LLC1,496,007$32.1M1.69%
Water Island Capital LLC944,247$20.2M2.70%
Alpine Associates Management Inc.925,000$19.8M1.17%
Pentwater Capital Management LP800,000$17.2M0.12%
Magnetar Financial LLC645,173$13.8M0.14%
Healthcare of Ontario Pension Plan Trust Fund643,738$13.8M0.02%
Polar Asset Management Partners Inc.630,410$13.5M0.32%
TIG Advisors, LLC613,918$13.2M0.63%
Beryl Capital Management LLC514,114$11.0M10.15%
Vanguard Fiduciary Trust Co478,839$10.3M0.00%
Gabelli Funds LLC464,097$9.95M0.07%
Cinctive Capital Management LP450,000$9.65M0.63%
LMR Partners LLP362,641$7.78M0.07%
Marshall Wace, LLP328,638$7.05M0.01%
Gabelli & Co Investment Advisers, Inc.325,350$6.98M1.03%
Public Sector Pension Investment Board236,000$5.06M0.02%
Capstone Investment Advisors, LLC236,000$5.06M0.04%
Abc Arbitrage SA228,817$4.91M0.65%
Alberta Investment Management Corp200,000$4.29M0.03%
Woodline Partners LP189,057$4.05M0.02%
Eversept Partners, LP183,902$3.94M0.26%
Groupe la Francaise179,495$3.85M0.05%
Slotnik Capital, LLC166,837$3.58M1.06%
Skandinaviska Enskilda Banken AB (publ)150,000$3.22M0.07%
Credit Industriel Et Commercial135,420$2.90M0.46%
Versor Investments LP123,673$2.65M6.49%
Sagefield Capital LP110,199$2.36M0.17%
Maven Securities LTD103,900$2.23M0.13%
Oxford Asset Management LLP99,747$2.14M0.86%
Gardner Lewis Asset Management L P84,768$1.82M0.39%
Harvest Management LLC75,000$1.61M0.86%
Simplex Trading, LLC64,464$1.38M0.04%
Mint Tower Capital Management B.V.60,000$1.29M0.13%
Prelude Capital Management, LLC56,673$1.22M0.09%
Timothy G. Youngquist 2020 Irrevocable Trust53,399$1.14M0.56%
Vanguard Asset Management, Ltd50,545$1.08M0.00%
ADAR1 Capital Management, LLC49,923$1.07M0.06%
Blackstone Group Inc.41,567$891.2K0.00%
Two Sigma Investments, LP41,500$889.8K0.00%
Toroso Investments, LLC32,074$687.7K0.00%
Ieq Capital, LLC31,854$683.0K0.00%
Twin Securities, Inc.31,626$678.1K0.34%
Vanguard Global Advisers, LLC29,783$638.5K0.00%
Engineers Gate Manager LP29,093$623.8K0.01%
PenderFund Capital Management Ltd.26,800$574.6K0.09%
Commonwealth of Pennsylvania Public School Empls Retrmt Sys26,500$568.2K0.00%
Polymer Capital Management (US) LLC24,872$533.3K0.08%
State of New Jersey Common Pension Fund D24,563$526.6K0.00%
CSS LLC24,000$514.6K0.03%
Inspire Advisors, LLC23,681$507.7K0.04%
Integrated Wealth Concepts LLC19,088$409.2K0.00%
CWM Advisors, LLC18,911$405.4K0.02%
Vanguard Investments Australia, Ltd.18,569$398.1K0.00%
Jain Global LLC18,333$393.1K0.01%
Mercer Global Advisors Inc16,411$351.8K0.00%
Wealth Enhancement Advisory Services, LLC15,812$339.2K0.00%
Voleon Capital Management LP15,032$322.3K0.01%
Scientech Research LLC14,342$307.5K0.26%
Quantbot Technologies LP14,101$302.3K0.01%
Carmignac Gestion13,691$293.5K0.00%
Prudential Financial Inc12,260$262.9K0.00%
Wolverine Asset Management LLC9,500$203.7K0.00%
Meteora Capital, LLC8,900$190.8K0.01%
Chicago Capital Management, LLC10,000$161.7K0.13%
Fifth Third Bancorp774$16.6K0.00%
Hickory Point Bank & Trust750$16.1K0.01%
Wealth Preservation Advisors, LLC53$1.14K0.00%
Spire Wealth Management40$8580.00%
SHP Wealth Management25$5360.00%
Fortitude Family Office, LLC23$4930.00%
Creative Financial Designs Inc20$4290.00%
Pinnacle Wealth Planning Services, Inc.19$4070.00%
Advisory Services Network, LLC11$2360.00%
Freestone Grove Partners LP2$430.00%

Sold out (56)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of DAWN in Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Atlas Venture Life Science Advisors, LLC6,412,560$59.8M
Vestal Point Capital, LP5,200,000$48.5M
AIGH Capital Management LLC1,992,021$18.6M
Citadel Advisors LLC1,359,613$12.7M
Jefferies Financial Group Inc.1,121,502$10.5M
Mak Capital One LLC826,205$7.70M
Jacobs Levy Equity Management, Inc729,281$6.80M
Parkman Healthcare Partners LLC645,544$6.02M
Schroder Investment Management Group569,624$5.23M
Pale Fire Capital SE544,063$5.07M
Algert Global LLC535,290$4.99M
Schonfeld Strategic Advisors LLC300,102$2.80M
Logos Global Management LP300,000$2.80M
Y-Intercept (Hong Kong) Ltd282,025$2.63M
Group One Trading, L.P.253,143$2.36M
Stonepine Capital Management, LLC200,000$1.86M
Catalytic Wealth RIA, LLC150,030$1.40M
Sphera Funds Management Ltd.145,371$1.35M
Gsa Capital Partners LLP142,809$1.33M
XTX Topco Ltd128,440$1.20M
Nomura Holdings Inc115,000$1.07M
Ameriprise Financial Inc87,073$811.5K
Perkins Capital Management Inc84,000$782.9K
Los Angeles Capital Management LLC100,314$706.2K
Tudor Investment Corp Et Al62,316$580.8K
Erste Asset Management GmbH51,200$479.7K
Graham Capital Management, L.P.50,355$469.3K
HSBC Holdings PLC49,333$455.3K
Brevan Howard Capital Management LP43,284$403.4K
Lion Point Capital, LP42,000$391.4K
ExodusPoint Capital Management, LP39,321$366.5K
Dark Forest Capital Management LP35,562$331.4K
Quest Partners LLC35,326$329.2K
Cetera Investment Advisers35,000$326.2K
Public Employees Retirement System of Ohio34,267$319.4K
Landscape Capital Management, L.L.C.33,898$315.9K
Martingale Asset Management L P33,700$314.1K
Fox Run Management, L.L.C.33,639$313.5K
VARCOV Co.28,016$261.1K
AlphaCentric Advisors LLC26,812$249.9K
Knott David M Jr25,884$241.2K
PDT Partners, LLC24,300$226.5K
Bayesian Capital Management, LP20,277$189.0K
KLP Kapitalforvaltning AS15,400$143.5K
ACT Capital Management, LLC12,900$120.2K
DRW Securities, LLC11,635$108.4K
LPL Financial LLC10,900$101.6K
Teacher Retirement System of Texas10,572$98.5K
Federated Hermes, Inc.2,730$25.4K
Antipodes Partners Ltd2,559$23.9K
Amalgamated Bank2,466$23.0K
Rockefeller Capital Management L.P.1,000$9.32K
Aster Capital Management (DIFC) Ltd651$6.07K
Daiwa Securities Group Inc.296$3.00K
Torren Management, LLC122$1.14K
Dunhill Financial, LLC1$6

Not filed for Q1 2026 yet (4)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding DAWN in Q4 2025 that haven't filed for Q1 2026
InstitutionShares, Q4 2025Value, Q4 2025
Vanguard Group Inc6,282,376$58.6M
Norges Bank169,000$1.58M
Oracle Investment Management Inc100,000$932.0K
Comerica Bank776$7.23K