Institutional Ownership
Day One Biopharmaceuticals I
CUSIP 23954D109COMDAWNGBXQ1 2026
13D / 13G Filings
37
Schedule 13D/13G on record
Beneficial Filers
11
Distinct reporting persons
Largest Stake
17.3%
Max % of class reported
Institutional Holders
199
13F filers (latest quarter)
Beneficial Owners — Schedule 13D / 13G
37 filings · latest Feb 17, 2026
| # | Filed | Reporting Person | Form | % of Class | Shares | Filing |
|---|---|---|---|---|---|---|
| 1 | Feb 17, 2026 | Vestal Point Capital, LP | 13G | 5.1% | 5.20M | SEC |
| 2 | Feb 5, 2026 | Fmr LLC | 13G/A | 5.6% | 5.72M | SEC |
| 3 | Nov 5, 2025 | Fmr LLC | 13G/A | 9.9% | 10.10M | SEC |
| 4 | Aug 14, 2025 | Ra Capital Management, L.P. | 13G/A | — | 913.30M | SEC |
| 5 | Aug 6, 2025 | Fmr LLC | 13G/A | 11.2% | 11.34M | SEC |
| 6 | Jul 17, 2025 | Blackrock, Inc. | 13G | 5.8% | 5.85M | SEC |
| 7 | Apr 28, 2025 | Blackrock, Inc. | 13G/A | 4.7% | 4.81M | SEC |
| 8 | Feb 14, 2025 | Ra Capital Management, L.P. | 13G/A | 5.7% | 5.76M | SEC |
| 9 | Feb 12, 2025 | Fmr LLC | 13G/A | 12.8% | 12.89M | SEC |
| 10 | Nov 14, 2024 | Atlas Venture Fund Xi, L.P. | 13G/A | 5.5% | 4.81M | SEC |
27 more beneficial-ownership filings on Premium
See the full Schedule 13D/13G history for Day One Biopharmaceuticals I.
Unlock full historyTop Institutional Holders (13F)
Largest reported positions · latest quarter
| # | Fund | Shares | Value |
|---|---|---|---|
| 1 | Blackrock, Inc. | 7.04M | $151.03M |
| 2 | Fil Ltd | 4.13M | $88.59M |
| 3 | Kryger Capital LLC | 3.90M | $83.54M |
| 4 | Deerfield Management Company, L.P. | 3.72M | $79.82M |
| 5 | Jpmorgan Chase & Co | 3.13M | $67.15M |
| 6 | State Street Corp | 2.87M | $61.53M |
| 7 | Balyasny Asset Management L.P. | 2.63M | $56.29M |
| 8 | Aqr Arbitrage LLC | 2.46M | $52.79M |
| 9 | Ubs Group AG | 2.31M | $49.42M |
| 10 | Geode Capital Management, LLC | 1.95M | $41.92M |