Day One Biopharmaceuticals Inc

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Day One Biopharmaceuticals Inc
TickerDAWN
CIK #0001845337
CUSIP23954D109
SectorLife Sciences - Pharmaceutical Preparations
Address395 Oyster Point Blvd Ste 217, South San Francisco, CA 94080-1930
Source [EDGAR]
CIK Filing 2011 - 2025
[0001845337] 10-K
[0001845337] 10-Q
[0001845337] 3
[0001845337] 4
[0001845337] 5
[0001845337] 8-K
[0001845337] D
[0001845337] SC 13D
[0001845337] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
BlackRock Inc Day One Biopharmaceuticals Inc [2025-07-17] 0.0
FMR LLC Day One Biopharmaceuticals Inc [2024-11-07] 0.0
Vanguard Group Inc Day One Biopharmaceuticals Inc [2024-02-13] 5.48
BlackRock Inc Day One Biopharmaceuticals Inc [2024-01-29] 5.9
FMR LLC Day One Biopharmaceuticals Inc [2022-09-12] 0.0
Atlas Venture Fund Xi LP Day One Biopharmaceuticals Inc [2022-02-11] 11.6
Takeda Pharmaceutical Co Ltd Day One Biopharmaceuticals Inc [2022-01-14] 0.7
Canaan Xi LP Day One Biopharmaceuticals Inc [2021-06-10] 17.3
AI DAY1 LLC Day One Biopharmaceuticals Inc [2021-06-09] 15.1
RA Capital Management LP Day One Biopharmaceuticals Inc [2021-06-07] 8.0
Form 3/4/5 Filer 2011 - 2025
York Charles N II
Day One Biopharmaceuticals, Inc.
Dubow Adam
Bender Jeremy
Merendino Lauren
Vasconcelles Michael
Nicholson Garry A
Josey John A.
Grossman William
Dable Habib J
Ramasastry Saira
Garland J. Scott
Holles Natalie C.
Blackman Samuel C.
AI Day1 LLC
Access Industries Management LLC
Blavatnik Len
Access Industries Holdings LLC
Gladstone Michael
Becker Daniel J.
Grant Julie Papanek
Atlas Venture Fund XI, L.P.
Canaan XI L.P.
Canaan Partners XI LLC
Atlas Venture Opportunity Fund I, L.P.
Atlas Venture Associates XI, L.P.
Atlas Venture Associates Opportunity I, LLC
Atlas Venture Opportunity Fund II, L.P.
Atlas Venture Associates XI, LLC
Atlas Venture Associates Opportunity I, L.P.
Millennium Pharmaceuticals Inc
Takeda Ventures, Inc.
Takeda Pharmaceutical Co Ltd
Takeda Pharmaceuticals U.S.A., Inc.
Atlas Venture Associates X, LLC
Atlas Venture Associates X LP
Form 13F Holdings
Firm Period DFND Voting Shares
FMR LLC [2025-06-30] DFND 11,339,833 11,342,699
BlackRock, Inc. [2025-06-30] SOLE 9,208,022 9,830,431
Atlas Venture Life Science Advisors LLC [2025-06-30] SOLE 6,430,257 6,430,257
Vanguard Group Inc [2025-06-30] SOLE 0 6,069,588
Franklin Resources Inc [2025-06-30] DFND 4,097,625 4,097,625
Deerfield Management Company LP [2025-06-30] DFND 3,723,131 3,723,131
Pictet Asset Management Holding SA [2025-06-30] SOLE 3,465,381 3,722,732
Alyeska Investment Group LP [2025-06-30] SOLE 3,012,187 3,012,187
Vestal Point Capital LP [2025-06-30] SOLE 3,000,000 3,000,000
State Street Corp [2025-06-30] DFND 2,571,188 2,689,686
Braidwell LP [2025-06-30] SOLE 2,181,598 2,181,598
Polar Capital Holdings Plc [2025-06-30] DFND 2,109,177 2,109,177
Geode Capital Management LLC [2025-06-30] DFND 1,712,429 1,712,429
Goldman Sachs Group Inc [2025-06-30] DFND 1,691,126 1,691,286
Morgan Stanley [2025-06-30] DFND 1,344,959 1,353,148
Hudson Bay Capital Management LP [2025-06-30] SOLE 1,296,700 1,296,700
Dimensional Fund Advisors LP [2025-06-30] SOLE 1,192,804 1,266,561
Millennium Management LLC [2025-06-30] SOLE 1,207,802 1,207,802
Price T Rowe Associates Inc /MD/ [2025-06-30] SOLE 1,003,279 1,043,030
Renaissance Technologies LLC [2025-06-30] SOLE 1,000,540 1,000,540
Bank of America Corp /DE/ [2025-06-30] DFND 9,190 965,423
Qube Research & Technologies Ltd [2025-06-30] SOLE 944,202 944,202
DAFNA Capital Management LLC [2025-06-30] SOLE 879,163 879,163
EcoR1 Capital LLC [2025-06-30] SOLE 862,068 862,068
Citadel Advisors LLC [2025-06-30] DFND 746,744 746,744
Northern Trust Corp [2025-06-30] DFND 600,081 600,081
Charles Schwab Investment Management Inc [2025-06-30] SOLE 578,763 578,763
J Goldman & Co LP [2025-06-30] SOLE 557,480 557,480
Parkman Healthcare Partners LLC [2025-06-30] SOLE 500,000 500,000
Kennedy Capital Management LLC [2025-06-30] SOLE 453,520 453,520
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