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DAWN

Day One Biopharmaceuticals, Inc.
$21.53 +0.00 (+0.00%) At close · Apr 24
Market Cap
$2.22B
Shares
103,334,169

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 212
Total Value: $1,852,089,344
Total Shares: 86,384,770
Showing 1–100 of 221 holdings by value · page 1 of 3

Institutional Ownership Trend

20 quarters

Superinvestors Holding DAWN

All superinvestors →
George Soros $32,998,304

Holder Concentration

Across 211 13F filers · Δ vs Dec 31, 2025
Top Holder
8.2%
Jun 2023 → Mar 2026 · range 8.2% – 14.5%
−2.5 pts
Top 5
27.2%
Jun 2023 → Mar 2026 · range 27.2% – 43.8%
−12.1 pts
Top 10
43.9%
Jun 2023 → Mar 2026 · range 43.9% – 62.4%
−13.4 pts
HHI
286
Jun 2023 → Mar 2026 · range 286 – 543
Broadly held−150

Quarterly Activity

vs Dec 31, 2025
New
86
Increased
64
Decreased
47
Sold Out
60
Unchanged
15
Holder count: +26
Institutional value: +140.5%
Shares held: +4.6%

Top Buyers

vs Dec 31, 2025
Institution Added Now Holds Open
Mega JPMORGAN CHASE & CO +3,091,223 3,134,753
Mega UBS Group AG +2,134,395 2,305,123
Mega Nuveen, LLC +1,301,543 1,823,998
Mega ALLIANCEBERNSTEIN L.P. +1,146,993 1,214,783
Large Balyasny Asset Management L.P. +1,135,311 2,625,235

Top Sellers

vs Dec 31, 2025
Institution Sold Now Holds Open
Mega FMR LLC −5,693,368 23,640
Large Pictet Asset Management Holding SA −2,977,767 13,034
Mega BlackRock, Inc. −1,793,087 7,044,487
Mega STATE STREET CORP −1,419,690 2,869,876
Mega CITADEL ADVISORS LLC −1,285,813 418,700

Top New Positions

vs Dec 31, 2025
Institution Acquired Value (USD) Open
Mid GLAZER CAPITAL, LLC 4,683,687 $100,418,249
Mega FIL Ltd 4,131,907 $88,588,086
Mid Kryger Capital LLC 3,896,485 $83,540,638
Mega VANGUARD CAPITAL MANAGEMENT LLC 3,357,684 $71,988,744
Mid AQR Arbitrage LLC 2,462,154 $52,788,581

Top Sold-Out Positions

vs Dec 31, 2025
Institution Previously Held Last Value (USD) Open
Small Atlas Venture Life Science Advisors, LLC 6,412,560 $59,765,059
Mega VANGUARD GROUP INC 6,282,376 $58,551,742
Mid Vestal Point Capital, LP 5,200,000 $48,464,000
Small AIGH Capital Management LLC 1,992,021 $18,565,635
Large Jefferies Financial Group Inc. 1,121,502 $10,452,398
Filter: New 86 Increased 64 Reduced 47 Sold out 60 Unchanged 15
Showing 100 of 221
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $151,033,795 8.15% 7,044,487
Mid GLAZER CAPITAL, LLC $100,418,249 5.42% 4,683,687
Mega FIL Ltd $88,588,086 4.78% 4,131,907
Mid Kryger Capital LLC $83,540,638 4.51% 3,896,485
Mid DEERFIELD MANAGEMENT COMPANY, L.P. $79,823,928 4.31% 3,723,131
Mega VANGUARD CAPITAL MANAGEMENT LLC $71,988,744 3.89% 3,357,684
Mega JPMORGAN CHASE & CO $67,209,102 3.63% 3,134,753
Mega STATE STREET CORP $61,530,141 3.32% 2,869,876
Large Balyasny Asset Management L.P. $56,285,038 3.04% 2,625,235
Mid AQR Arbitrage LLC $52,788,581 2.85% 2,462,154
Mega UBS Group AG $49,421,836 2.67% 2,305,123
Mega GEODE CAPITAL MANAGEMENT, LLC $41,909,518 2.26% 1,954,735
Large Qube Research & Technologies Ltd $41,905,594 2.26% 1,954,552
Mega MILLENNIUM MANAGEMENT LLC $41,326,822 2.23% 1,927,557
Mega BANK OF AMERICA CORP /DE/ Bank $40,797,488 2.20% 1,902,868
Mid O'Connor Alternative Investments LLC $40,040,336 2.16% 1,867,553
Mega Nuveen, LLC $39,106,515 2.11% 1,823,998
Mid PERCEPTIVE ADVISORS LLC $37,644,330 2.03% 1,755,799
Mid ODDO BHF ASSET MANAGEMENT SAS $33,232,000 1.79% 1,550,000
Mid SOROS FUND MANAGEMENT LLC $32,998,304 1.78% 1,539,100
Mid First Trust Capital Management L.P. $32,074,389 1.73% 1,496,007
Large RENAISSANCE TECHNOLOGIES LLC $27,807,336 1.50% 1,296,984
Mega ALLIANCEBERNSTEIN L.P. $26,044,947 1.41% 1,214,783
Mega GOLDMAN SACHS GROUP INC $20,994,861 1.13% 979,238
Small DAFNA Capital Management LLC $20,978,246 1.13% 978,463
Small WATER ISLAND CAPITAL LLC $20,244,655 1.09% 944,247
Mid ALPINE ASSOCIATES MANAGEMENT INC. $19,832,000 1.07% 925,000
Mega DIMENSIONAL FUND ADVISORS LP $17,567,312 0.95% 819,371
Large Pentwater Capital Management LP $17,152,000 0.93% 800,000
Mega MORGAN STANLEY $14,731,570 0.80% 687,107
Large Hudson Bay Capital Management LP $14,364,800 0.78% 670,000
Mega NORTHERN TRUST CORP Bank $14,282,897 0.77% 666,180
Mid Magnetar Financial LLC $13,832,508 0.75% 645,173
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $13,801,742 0.75% 643,738
Mid Polar Asset Management Partners Inc. $13,515,990 0.73% 630,410
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $13,240,507 0.71% 617,561
Mid TIG Advisors, LLC $13,162,401 0.71% 613,918
Mega JANUS HENDERSON GROUP PLC $11,715,416 0.63% 546,428
Small Beryl Capital Management LLC $11,022,604 0.60% 514,114
Mid Jump Financial, LLC $10,663,505 0.58% 497,365
Mega VANGUARD FIDUCIARY TRUST CO Bank $10,266,308 0.55% 478,839
Mega JANE STREET GROUP, LLC $10,193,346 0.55% 475,436
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $10,152,761 0.55% 473,543
Large GABELLI FUNDS LLC $9,950,239 0.54% 464,097
Mid Cinctive Capital Management LP $9,648,000 0.52% 450,000
Mega AQR CAPITAL MANAGEMENT LLC $9,529,369 0.51% 444,467
Mid KENNEDY CAPITAL MANAGEMENT LLC $9,363,534 0.51% 436,732
Large Squarepoint Ops LLC $8,912,736 0.48% 415,706
Mid Hennion & Walsh Asset Management, Inc. $7,871,352 0.42% 367,134
Large LMR Partners LLP $7,775,023 0.42% 362,641
Mega BNP PARIBAS ARBITRAGE, SA $7,241,724 0.39% 337,767
Large MARSHALL WACE, LLP $7,045,998 0.38% 328,638
Small GABELLI & Co INVESTMENT ADVISERS, INC. $6,975,504 0.38% 325,350
Large Caption Management, LLC $6,056,800 0.33% 282,500
Mega CITADEL ADVISORS LLC $5,610,848 0.30% 261,700
Large CAPSTONE INVESTMENT ADVISORS, LLC $5,059,840 0.27% 236,000
Large Public Sector Pension Investment Board Pension $5,059,840 0.27% 236,000
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,976,224 0.27% 232,100
Mega Bank of New York Mellon Corp Bank $4,953,561 0.27% 231,043
Small ABC ARBITRAGE SA $4,905,836 0.26% 228,817
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $4,296,576 0.23% 200,400
Mid Alberta Investment Management Corp $4,288,000 0.23% 200,000
Large Man Group plc $4,287,999 0.23% 200,000
Large Woodline Partners LP $4,053,382 0.22% 189,057
Mid Eversept Partners, LP $3,942,858 0.21% 183,902
Mid Groupe la Francaise $3,848,372 0.21% 179,495
Small Slotnik Capital, LLC $3,576,985 0.19% 166,837
Mega Invesco Ltd. $3,428,211 0.19% 159,898
Mega CITADEL ADVISORS LLC $3,366,080 0.18% 157,000
Mid Skandinaviska Enskilda Banken AB (publ) $3,216,000 0.17% 150,000
Mega MASSACHUSETTS FINANCIAL SERVICES CO /MA/ $3,151,936 0.17% 147,012
Mega Swiss National Bank Bank $3,033,760 0.16% 141,500
Mega UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC $2,937,085 0.16% 136,991
Small CREDIT INDUSTRIEL ET COMMERCIAL $2,903,404 0.16% 135,420
Micro Versor Investments LP $2,651,549 0.14% 123,673
Large SG Americas Securities, LLC Broker-Dealer $2,635,447 0.14% 122,922
Mega PRICE T ROWE ASSOCIATES INC /MD/ $2,557,534 0.14% 119,288
Mega RHUMBLINE ADVISERS $2,541,862 0.14% 118,557
Mega CITIGROUP INC $2,465,600 0.13% 115,000
Mega CITIGROUP INC $2,465,600 0.13% 115,000
Mid Sagefield Capital LP $2,362,666 0.13% 110,199
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $2,358,400 0.13% 110,000
Large SEI INVESTMENTS CO $2,242,581 0.12% 104,598
Small Maven Securities LTD Broker-Dealer $2,227,616 0.12% 103,900
Small Virtus Investment Advisers, LLC $2,165,225 0.12% 100,990
Large Centiva Capital, LP $2,144,000 0.12% 100,000
Small OXFORD ASSET MANAGEMENT LLP $2,138,575 0.12% 99,747
Mega AMERICAN CENTURY COMPANIES INC $1,892,680 0.10% 88,278
Small GARDNER LEWIS ASSET MANAGEMENT L P $1,817,425 0.10% 84,768
Large ALPS ADVISORS INC $1,802,932 0.10% 84,092
Mid Aquatic Capital Management LLC $1,680,445 0.09% 78,379
Small HARVEST MANAGEMENT LLC $1,608,000 0.09% 75,000
Large CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM Pension $1,446,406 0.08% 67,463
Mega DEUTSCHE BANK AG\ Bank $1,424,579 0.08% 66,445
Mid SIMPLEX TRADING, LLC $1,382,108 0.07% 64,464
Small Mint Tower Capital Management B.V. $1,286,400 0.07% 60,000
Large Rafferty Asset Management, LLC $1,269,398 0.07% 59,207
Mid Susquehanna Portfolio Strategies, LLC $1,230,205 0.07% 57,379
Mid PRELUDE CAPITAL MANAGEMENT, LLC $1,215,069 0.07% 56,673
Mega WELLS FARGO & COMPANY/MN $1,209,837 0.07% 56,429
Key facts CIK 1845337 CUSIP 23954D109 13F (30d) 1 filings 1 filers Visit website Investor relations

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