BRISBANE, CA
DAY ONE BIOPHARMACEUTICALS, INC.DAWN— Latest position per institution from SEC 13F filings
15
Institutional holders
80.78M
Total shares held
1.16B
Estimated value
4.04M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
7.04M
Value
151.03M
Filed
Mar 31, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC
CIK 1917529
Shares
6.41M
Value
59.77M
Filed
Dec 31, 2025
VANGUARD GROUP INC
CIK 102909
Shares
6.28M
Value
58.55M
Filed
Dec 31, 2025
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
5.76M
Value
45.64M
Filed
Mar 31, 2025
VESTAL POINT CAPITAL, LP
CIK 1974915
Shares
5.20M
Value
48.46M
Filed
Dec 31, 2025
GLAZER CAPITAL, LLC
CIK 1076809
Shares
4.68M
Value
100.42K
Filed
Mar 31, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
4.53M
Value
62.47M
Filed
Jun 30, 2024
FIL LTD
CIK 318989
Shares
4.13M
Value
88.59M
Filed
Mar 31, 2026
KRYGER CAPITAL LLC
CIK 2123957
Shares
3.90M
Value
83.54M
Filed
Mar 31, 2026
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 1009258
Shares
3.72M
Value
79.82M
Filed
Mar 31, 2026
RUBRIC CAPITAL MANAGEMENT LP
CIK 1687509
Shares
3.38M
Value
23.81M
Filed
Sep 30, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
3.36M
Value
71.99M
Filed
Mar 31, 2026
ESTUARY CAPITAL MANAGEMENT LP
CIK 1965005
Shares
3.33M
Value
26.38M
Filed
Mar 31, 2025
JPMORGAN CHASE & CO
CIK 19617
Shares
3.13M
Value
67.15M
Filed
Mar 31, 2026
FAIRMOUNT FUNDS MANAGEMENT LLC
CIK 1802528
Shares
3.10M
Value
39.32M
Filed
Dec 31, 2024
STATE STREET CORP
CIK 93751
Shares
2.87M
Value
61.53M
Filed
Mar 31, 2026
BALYASNY ASSET MANAGEMENT L.P.
CIK 1218710
Shares
2.63M
Value
56.29M
Filed
Mar 31, 2026
VIKING GLOBAL INVESTORS LP
CIK 1103804
Shares
2.56M
Value
35.64M
Filed
Sep 30, 2024
AQR ARBITRAGE LLC
CIK 1167456
Shares
2.46M
Value
52.79M
Filed
Mar 31, 2026
UBS GROUP AG
CIK 1610520
Shares
2.31M
Value
49.42M
Filed
Mar 31, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 7.04M | 151.03M | Mar 31, 2026 |
| 2 | ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | 1917529 | 6.41M | 59.77M | Dec 31, 2025 |
| 3 | VANGUARD GROUP INC | 102909 | 6.28M | 58.55M | Dec 31, 2025 |
| 4 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 5.76M | 45.64M | Mar 31, 2025 |
| 5 | VESTAL POINT CAPITAL, LP | 1974915 | 5.20M | 48.46M | Dec 31, 2025 |
| 6 | GLAZER CAPITAL, LLC | 1076809 | 4.68M | 100.42K | Mar 31, 2026 |
| 7 | BLACKROCK FINANCE, INC. | 1364742 | 4.53M | 62.47M | Jun 30, 2024 |
| 8 | FIL LTD | 318989 | 4.13M | 88.59M | Mar 31, 2026 |
| 9 | KRYGER CAPITAL LLC | 2123957 | 3.90M | 83.54M | Mar 31, 2026 |
| 10 | DEERFIELD MANAGEMENT COMPANY, L.P. | 1009258 | 3.72M | 79.82M | Mar 31, 2026 |
| 11 | RUBRIC CAPITAL MANAGEMENT LP | 1687509 | 3.38M | 23.81M | Sep 30, 2025 |
| 12 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 3.36M | 71.99M | Mar 31, 2026 |
| 13 | ESTUARY CAPITAL MANAGEMENT LP | 1965005 | 3.33M | 26.38M | Mar 31, 2025 |
| 14 | JPMORGAN CHASE & CO | 19617 | 3.13M | 67.15M | Mar 31, 2026 |
| 15 | FAIRMOUNT FUNDS MANAGEMENT LLC | 1802528 | 3.10M | 39.32M | Dec 31, 2024 |
| 16 | STATE STREET CORP | 93751 | 2.87M | 61.53M | Mar 31, 2026 |
| 17 | BALYASNY ASSET MANAGEMENT L.P. | 1218710 | 2.63M | 56.29M | Mar 31, 2026 |
| 18 | VIKING GLOBAL INVESTORS LP | 1103804 | 2.56M | 35.64M | Sep 30, 2024 |
| 19 | AQR ARBITRAGE LLC | 1167456 | 2.46M | 52.79M | Mar 31, 2026 |
| 20 | UBS GROUP AG | 1610520 | 2.31M | 49.42M | Mar 31, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.