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Equibles

DAWN

Day One Biopharmaceuticals, Inc.

Company with tickers: DAWN

CIK
1845337
CUSIP
23954D109
Shares Outstanding
103,334,169
13F Activity (30d)
143 filings 138 filers

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: 211
Total Value: $1,896,730,039
Total Shares: 88,466,892
Showing 1–100 of 220 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
8.0%
Jun 2023 → Mar 2026 · range 8.0% – 14.5%
−2.7 pts
Top 5
26.5%
Jun 2023 → Mar 2026 · range 26.5% – 43.8%
−12.7 pts
Top 10
42.9%
Jun 2023 → Mar 2026 · range 42.9% – 62.4%
−14.4 pts
HHI
278
Jun 2023 → Mar 2026 · range 278 – 543
Broadly held−158

Quarterly Activity

vs Dec 31, 2025
New
85
Increased
64
Decreased
47
Sold Out
60
Unchanged
15
Holder count: +25
Institutional value: +146.3%
Shares held: +7.1%

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 85 Increased 64 Reduced 47 Sold out 60 Unchanged 15
Showing 100 of 220
All Common Calls Puts
Export CSV
Holder Value (USD) % of 13F Shares Open
Mega BlackRock, Inc. $151,033,795 7.96% 7,044,487
Mid GLAZER CAPITAL, LLC $100,418,249 5.29% 4,683,687
Mega FIL Ltd $88,588,086 4.67% 4,131,907
Mid Kryger Capital LLC $83,540,638 4.40% 3,896,485
Mid DEERFIELD MANAGEMENT COMPANY, L.P. $79,823,928 4.21% 3,723,131
Mega VANGUARD CAPITAL MANAGEMENT LLC $71,988,744 3.80% 3,357,684
Mega JPMORGAN CHASE & CO $67,209,102 3.54% 3,134,753
Mega STATE STREET CORP $61,530,141 3.24% 2,869,876
Large Balyasny Asset Management L.P. $56,285,038 2.97% 2,625,235
Mid AQR Arbitrage LLC $52,788,581 2.78% 2,462,154
Mega UBS Group AG $49,421,836 2.61% 2,305,123
Mega VANGUARD PORTFOLIO MANAGEMENT LLC $44,934,230 2.37% 2,095,813
Mega GEODE CAPITAL MANAGEMENT, LLC $41,909,518 2.21% 1,954,735
Large Qube Research & Technologies Ltd $41,905,594 2.21% 1,954,552
Mega MILLENNIUM MANAGEMENT LLC $41,326,822 2.18% 1,927,557
Mega BANK OF AMERICA CORP /DE/ Bank $40,797,488 2.15% 1,902,868
Mid O'Connor Alternative Investments LLC $40,040,336 2.11% 1,867,553
Mega Nuveen, LLC $39,106,515 2.06% 1,823,998
Mid PERCEPTIVE ADVISORS LLC $37,644,330 1.98% 1,755,799
Mid ODDO BHF ASSET MANAGEMENT SAS $33,232,000 1.75% 1,550,000
Mid SOROS FUND MANAGEMENT LLC $32,998,304 1.74% 1,539,100
Mid First Trust Capital Management L.P. $32,074,389 1.69% 1,496,007
Large RENAISSANCE TECHNOLOGIES LLC $27,807,336 1.47% 1,296,984
Mega ALLIANCEBERNSTEIN L.P. $26,044,947 1.37% 1,214,783
Mega GOLDMAN SACHS GROUP INC $20,994,861 1.11% 979,238
Small DAFNA Capital Management LLC $20,978,246 1.11% 978,463
Small WATER ISLAND CAPITAL LLC $20,244,655 1.07% 944,247
Mid ALPINE ASSOCIATES MANAGEMENT INC. $19,832,000 1.05% 925,000
Mega DIMENSIONAL FUND ADVISORS LP $17,567,312 0.93% 819,371
Large Pentwater Capital Management LP $17,152,000 0.90% 800,000
Mega MORGAN STANLEY $14,731,570 0.78% 687,107
Large Hudson Bay Capital Management LP $14,364,800 0.76% 670,000
Mega NORTHERN TRUST CORP Bank $14,282,897 0.75% 666,180
Mid Magnetar Financial LLC $13,832,508 0.73% 645,173
Large HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND Pension $13,801,742 0.73% 643,738
Mid Polar Asset Management Partners Inc. $13,515,990 0.71% 630,410
Mega CHARLES SCHWAB INVESTMENT MANAGEMENT INC $13,240,507 0.70% 617,561
Mid TIG Advisors, LLC $13,162,401 0.69% 613,918
Mega JANUS HENDERSON GROUP PLC $11,715,416 0.62% 546,428
Small Beryl Capital Management LLC $11,022,604 0.58% 514,114
Mid Jump Financial, LLC $10,663,505 0.56% 497,365
Mega VANGUARD FIDUCIARY TRUST CO Bank $10,266,308 0.54% 478,839
Mega JANE STREET GROUP, LLC $10,193,346 0.54% 475,436
Mega SUSQUEHANNA INTERNATIONAL GROUP, LLP $10,152,761 0.54% 473,543
Large GABELLI FUNDS LLC $9,950,239 0.52% 464,097
Mid Cinctive Capital Management LP $9,648,000 0.51% 450,000
Mega AQR CAPITAL MANAGEMENT LLC $9,529,369 0.50% 444,467
Mid KENNEDY CAPITAL MANAGEMENT LLC $9,363,534 0.49% 436,732
Large Squarepoint Ops LLC $8,912,736 0.47% 415,706
Mid Hennion & Walsh Asset Management, Inc. $7,871,352 0.41% 367,134
Large LMR Partners LLP $7,775,023 0.41% 362,641
Mega BNP PARIBAS ARBITRAGE, SA $7,241,724 0.38% 337,767
Large MARSHALL WACE, LLP $7,045,998 0.37% 328,638
Small GABELLI & Co INVESTMENT ADVISERS, INC. $6,975,504 0.37% 325,350
Large Caption Management, LLC $6,056,800 0.32% 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 0.26% 232,100
Mega Bank of New York Mellon Corp Bank $4,953,561 0.26% 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 0.21% 189,057
Mid Eversept Partners, LP $3,942,858 0.21% 183,902
Mid Groupe la Francaise $3,848,372 0.20% 179,495
Small Slotnik Capital, LLC $3,576,985 0.19% 166,837
Mega Invesco Ltd. $3,428,211 0.18% 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 0.15% 136,991
Small CREDIT INDUSTRIEL ET COMMERCIAL $2,903,404 0.15% 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 0.13% 119,288
Mega RHUMBLINE ADVISERS $2,541,862 0.13% 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 0.12% 110,199
Large NOMURA ASSET MANAGEMENT INTERNATIONAL INC. $2,358,400 0.12% 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 0.11% 100,990
Large Centiva Capital, LP $2,144,000 0.11% 100,000
Small OXFORD ASSET MANAGEMENT LLP $2,138,575 0.11% 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 0.08% 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 0.06% 57,379
Mid PRELUDE CAPITAL MANAGEMENT, LLC $1,215,069 0.06% 56,673

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