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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.

Q2 2026 vs. Q1 2026

How the institutions holding Day One Biopharmaceuticals, Inc. changed between Q1 2026 and Q2 2026.

All holders in Q2 2026All holders in Q1 2026

13F holders of DAWN: Q1 2026 compared with Q2 2026
MeasureQ1 2026Of which not filed for Q2 2026Q2 2026Change
Holders20831−204
Shares86.9M571.5K165−86.3M (−100.0%)
Value$1.85B$12.3M$3.55K−$1.84B (−100.0%)

3 institutions that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (0)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q2 2026 but not at the end of Q1 2026.

None.

Sold out (204)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q1 2026 and filed for Q2 2026 without it.

Showing the largest 100 of 204 by value.

Institutions that sold out of DAWN in Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
BlackRock, Inc.7,044,487$151.0M
Glazer Capital, LLC4,683,687$100.4M
FIL Ltd4,131,907$88.6M
Kryger Capital LLC3,896,485$83.5M
Deerfield Management Company, L.P. (Series C)3,723,131$79.8M
Vanguard Capital Management LLC3,357,684$72.0M
JPMorgan Chase & Co3,134,753$67.1M
State Street Corp2,869,876$61.5M
Balyasny Asset Management LLC2,625,235$56.3M
CNH Partners LLC2,462,154$52.8M
UBS Group AG2,305,123$49.4M
Vanguard Portfolio Management LLC2,095,813$44.9M
Geode Capital Management, LLC1,954,735$41.9M
Qube Research & Technologies Ltd1,954,552$41.9M
Millennium Management LLC1,927,557$41.3M
Bank of America Corp1,902,868$40.8M
O'Connor Alternative Investments LLC1,867,553$40.0M
Nuveen, LLC1,823,998$39.1M
Perceptive Advisors LLC1,755,799$37.6M
Oddo BHF Asset Management SAS1,550,000$33.2M
Soros Fund Management LLCSuperinvestorSoros Fund Management1,539,100$33.0M
Vivaldi Asset Management, LLC1,496,007$32.1M
Renaissance Technologies LLC1,296,984$27.8M
Goldman Sachs Group Inc979,238$21.0M
DAFNA Capital Management LLC978,463$21.0M
Water Island Capital LLC944,247$20.2M
Alpine Associates Management Inc.925,000$19.8M
Dimensional Fund Advisors LP819,371$17.6M
Pentwater Capital Management LP800,000$17.2M
Morgan Stanley687,107$14.7M
Hudson Bay Capital Management LP670,000$14.4M
Northern Trust Corp666,180$14.3M
Magnetar Financial LLC645,173$13.8M
Healthcare of Ontario Pension Plan Trust Fund643,738$13.8M
Polar Asset Management Partners Inc.630,410$13.5M
Charles Schwab Investment Management Inc617,561$13.2M
TIG Advisors, LLC613,918$13.2M
Alliancebernstein L.P.1,214,783$11.3M
Beryl Capital Management LLC514,114$11.0M
Jump Financial, LLC497,365$10.7M
Vanguard Fiduciary Trust Co478,839$10.3M
Jane Street Group, LLC475,436$10.2M
Susquehanna International Group, LLP473,543$10.2M
Gabelli Funds LLC464,097$9.95M
Cinctive Capital Management LP450,000$9.65M
AQR Capital Management LLC444,467$9.53M
Kennedy Capital Management, Inc.436,732$9.36M
Squarepoint Ops LLC415,706$8.91M
Hennion & Walsh Asset Management, Inc.367,134$7.87M
LMR Partners LLP362,641$7.78M
BNP Paribas Arbitrage, SA337,767$7.24M
Marshall Wace, LLP328,638$7.05M
Gabelli & Co Investment Advisers, Inc.325,350$6.98M
Public Sector Pension Investment Board236,000$5.06M
Capstone Investment Advisors, LLC236,000$5.06M
Bank of New York Mellon Corp231,043$4.95M
Abc Arbitrage SA228,817$4.91M
Alberta Investment Management Corp200,000$4.29M
Man Group plc200,000$4.29M
Woodline Partners LP189,057$4.05M
Eversept Partners, LP183,902$3.94M
Groupe la Francaise179,495$3.85M
Slotnik Capital, LLC166,837$3.58M
Invesco Ltd.159,898$3.43M
Skandinaviska Enskilda Banken AB (publ)150,000$3.22M
Massachusetts Financial Services Co147,012$3.15M
Swiss National Bank141,500$3.03M
UBS Asset Management Americas Inc136,991$2.94M
Credit Industriel Et Commercial135,420$2.90M
Versor Investments LP123,673$2.65M
SG Americas Securities, LLC122,922$2.63M
Price T Rowe Associates Inc119,288$2.56M
Rhumbline Advisers118,557$2.54M
Sagefield Capital LP110,199$2.36M
Nomura Asset Management International Inc.110,000$2.36M
SEI Investments Co104,598$2.24M
Maven Securities LTD103,900$2.23M
Virtus Investment Advisers, Inc.100,990$2.17M
Oxford Asset Management LLP99,747$2.14M
American Century Companies Inc88,278$1.89M
Gardner Lewis Asset Management L P84,768$1.82M
Alps Advisors Inc84,092$1.80M
Aquatic Capital Management LLC78,379$1.68M
Harvest Management LLC75,000$1.61M
California State Teachers Retirement System67,463$1.45M
Deutsche Bank AG66,445$1.42M
Simplex Trading, LLC64,464$1.38M
Mint Tower Capital Management B.V.60,000$1.29M
Rafferty Asset Management, LLC59,207$1.27M
Susquehanna Portfolio Strategies, LLC57,379$1.23M
Prelude Capital Management, LLC56,673$1.22M
Wells Fargo & Company56,429$1.21M
Timothy G. Youngquist 2020 Irrevocable Trust53,399$1.14M
Franklin Resources Inc52,623$1.13M
Mariner, LLC52,342$1.12M
Legal & General Group Plc51,763$1.11M
Vanguard Asset Management, Ltd50,545$1.08M
ADAR1 Capital Management, LLC49,923$1.07M
MetLife Investment Management44,101$945.5K
Fisher Asset Management, LLC43,698$936.9K

Not filed for Q2 2026 yet (3)

Institutions that held Day One Biopharmaceuticals, Inc. at the end of Q1 2026 and haven't filed a 13F for Q2 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding DAWN in Q1 2026 that haven't filed for Q2 2026
InstitutionShares, Q1 2026Value, Q1 2026
Janus Henderson Group PLC546,428$11.7M
CWM, LLC25,043$536.9K
Sunbelt Securities, Inc.66$1.42K