| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 5.8% | +22% | $38,061,315 | +$6,751,002 | 5,849,917 | +22% | BlackRock, Inc. | 30 Jun 2025 |
| FMR LLC | 5.6% | -43% | $53,284,798 | -$40,829,513 | 5,717,008 | -43% | FMR LLC | 31 Dec 2025 |
| Vestal Point Capital, LP | 5.1% | $55,068,000 | 5,200,000 | Vestal Point Capital, LP | 31 Dec 2025 |
As of 31 Dec 2025, 180 institutional investors reported holding 81,357,272 shares of Day One Biopharmaceuticals, Inc. - Common Stock, par value $0.0001 per share (DAWN). This represents 80% of the company’s total 101,960,784 outstanding shares.
The largest institutional shareholders of Day One Biopharmaceuticals, Inc. - Common Stock, par value $0.0001 per share (DAWN) together control 64% of the company’s outstanding shares — a level of ownership often associated with strong institutional conviction and long‑term capital commitment.
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 8.7% | 8,837,574 | -1.8% | 0% | $82,366,188 |
| Atlas Venture Life Science Advisors, LLC | 6.3% | 6,412,560 | -0.28% | 6.9% | $59,765,059 |
| VANGUARD GROUP INC | 6.2% | 6,282,376 | +1.6% | 0% | $58,551,745 |
| FMR LLC | 5.6% | 5,717,008 | -43% | 0% | $53,282,512 |
| Vestal Point Capital, LP | 5.1% | 5,200,000 | +94% | 1.8% | $48,464,000 |
| STATE STREET CORP | 4.2% | 4,289,566 | +32% | 0% | $39,978,755 |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 3.7% | 3,723,131 | -21% | 0.44% | $34,699,581 |
| Pictet Asset Management Holding SA | 2.9% | 2,990,801 | +26% | 0.03% | $27,874,265 |
| AIGH Capital Management LLC | 2% | 1,992,021 | +31% | 5.5% | $18,565,635 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8% | 1,877,838 | +6.6% | 0% | $17,504,632 |
| Hudson Bay Capital Management LP | 1.7% | 1,700,000 | +29% | 0.09% | $15,844,000 |
| MORGAN STANLEY | 1.5% | 1,550,274 | +19% | 0% | $14,448,557 |
| GOLDMAN SACHS GROUP INC | 1.5% | 1,506,234 | +9.8% | 0% | $14,038,100 |
| Balyasny Asset Management L.P. | 1.5% | 1,489,924 | +7.6% | 0.03% | $13,886,092 |
| Qube Research & Technologies Ltd | 1.5% | 1,486,562 | +27% | 0.02% | $13,854,758 |
| CITADEL ADVISORS LLC | 1.3% | 1,359,613 | +105% | 0.01% | $12,671,593 |
| MILLENNIUM MANAGEMENT LLC | 1.3% | 1,349,919 | +95% | 0.01% | $12,581,245 |
| RENAISSANCE TECHNOLOGIES LLC | 1.3% | 1,305,084 | +44% | 0.02% | $12,163,383 |
| Jefferies Financial Group Inc. | 1.1% | 1,121,502 | 0.09% | $10,452,399 | |
| BANK OF AMERICA CORP /DE/ | 1.1% | 1,083,818 | -9.1% | 0% | $10,101,185 |
| DIMENSIONAL FUND ADVISORS LP | 1% | 1,037,312 | -15% | 0% | $9,666,870 |
| DAFNA Capital Management LLC | 0.98% | 999,163 | 0% | 2.2% | $9,312,199 |
| JANE STREET GROUP, LLC | 0.83% | 845,154 | +203% | 0.01% | $7,876,835 |
| MAK CAPITAL ONE LLC | 0.81% | 826,205 | -43% | 1% | $7,700,231 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | 0.72% | 737,660 | +2457% | 0.01% | $6,874,991 |
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2025 Q4 | 81,357,272 | $757,944,144 | -$18,862,257 | $9.32 | 180 |
| 2025 Q3 | 85,449,652 | $602,397,711 | -$3,593,530 | $7.05 | 169 |
| 2025 Q2 | 86,186,499 | $560,206,343 | -$67,566,968 | $6.50 | 173 |
| 2025 Q1 | 94,058,917 | $745,890,533 | -$40,487,714 | $7.93 | 183 |
| 2024 Q4 | 93,739,417 | $1,187,690,667 | -$5,879,821 | $12.67 | 163 |
| 2024 Q3 | 92,050,053 | $1,283,687,781 | +$239,491,695 | $13.93 | 165 |
| 2024 Q2 | 74,705,046 | $1,029,464,955 | +$17,373,333 | $13.78 | 155 |
| 2024 Q1 | 72,782,347 | $1,202,300,406 | -$58,498,635 | $16.52 | 147 |
| 2023 Q4 | 76,570,666 | $1,117,957,204 | -$50,224,829 | $14.60 | 138 |
| 2023 Q3 | 77,547,732 | $951,517,363 | -$22,223,998 | $12.27 | 127 |
| 2023 Q2 | 78,803,713 | $941,011,552 | +$208,122,003 | $11.94 | 136 |
| 2023 Q1 | 61,209,087 | $818,137,120 | -$10,189,943 | $13.37 | 122 |
| 2022 Q4 | 59,797,551 | $1,286,831,022 | -$37,719,296 | $21.52 | 105 |
| 2022 Q3 | 60,343,678 | $1,208,648,617 | +$24,007,409 | $20.03 | 87 |
| 2022 Q2 | 59,307,013 | $1,061,573,186 | +$302,547,160 | $17.90 | 80 |
| 2022 Q1 | 43,302,427 | $429,553,897 | +$13,144,675 | $9.92 | 66 |
| 2021 Q4 | 41,477,196 | $698,277,000 | +$74,959,681 | $16.85 | 57 |
| 2021 Q3 | 19,043,827 | $450,147,328 | +$32,649,130 | $23.73 | 43 |
| 2021 Q2 | 17,724,839 | $401,085,000 | +$401,084,962 | $22.77 | 32 |