WATERTOWN, MA
DISC MEDICINE, INC.IRON— Latest position per institution from SEC 13F filings
15
Institutional holders
33.37M
Total shares held
2.24B
Estimated value
1.67M
Avg. position size
FMR LLC
CIK 315066
Shares
4.89M
Value
357.98M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
2.47M
Value
180.50M
Filed
Jun 30, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
2.45M
Value
179.21M
Filed
Jun 30, 2026
JPMORGAN CHASE & CO
CIK 19617
Shares
1.88M
Value
139.87M
Filed
Jun 30, 2026
PRICE T ROWE ASSOCIATES INC /MD/
CIK 80255
Shares
1.88M
Value
137.17K
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
1.77M
Value
140.37M
Filed
Dec 31, 2025
WELLINGTON MANAGEMENT GROUP LLP
CIK 902219
Shares
1.74M
Value
127.36M
Filed
Jun 30, 2026
STATE STREET CORP
CIK 93751
Shares
1.65M
Value
120.60M
Filed
Jun 30, 2026
VESTAL POINT CAPITAL, LP
CIK 1974915
Shares
1.55M
Value
113.37M
Filed
Jun 30, 2026
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC
CIK 1917529
Shares
1.51M
Value
110.72M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
1.44M
Value
64.79M
Filed
Jun 30, 2024
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
1.37M
Value
100.13M
Filed
Jun 30, 2026
FRAZIER LIFE SCIENCES MANAGEMENT, L.P.
CIK 1892134
Shares
1.35M
Value
99.09M
Filed
Jun 30, 2026
TCG CROSSOVER MANAGEMENT, LLC
CIK 1839948
Shares
1.34M
Value
98.14M
Filed
Jun 30, 2026
BVF INC/IL
CIK 1056807
Shares
1.15M
Value
84.38M
Filed
Jun 30, 2026
ASSENAGON ASSET MANAGEMENT S.A.
CIK 1546007
Shares
1.12M
Value
73.28M
Filed
Sep 30, 2026
NOVO HOLDINGS A/S
CIK 1388325
Shares
1.09M
Value
51.24M
Filed
Sep 30, 2023
WOODLINE PARTNERS LP
CIK 1784547
Shares
958.28K
Value
70.09M
Filed
Jun 30, 2026
SIREN, L.L.C.
CIK 2005245
Shares
888.40K
Value
64.98M
Filed
Jun 30, 2026
LOGOS GLOBAL MANAGEMENT LP
CIK 1792126
Shares
875K
Value
64M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | FMR LLC | 315066 | 4.89M | 357.98M | Jun 30, 2026 |
| 2 | BLACKROCK, INC. | 2012383 | 2.47M | 180.50M | Jun 30, 2026 |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 2.45M | 179.21M | Jun 30, 2026 |
| 4 | JPMORGAN CHASE & CO | 19617 | 1.88M | 139.87M | Jun 30, 2026 |
| 5 | PRICE T ROWE ASSOCIATES INC /MD/ | 80255 | 1.88M | 137.17K | Jun 30, 2026 |
| 6 | VANGUARD GROUP INC | 102909 | 1.77M | 140.37M | Dec 31, 2025 |
| 7 | WELLINGTON MANAGEMENT GROUP LLP | 902219 | 1.74M | 127.36M | Jun 30, 2026 |
| 8 | STATE STREET CORP | 93751 | 1.65M | 120.60M | Jun 30, 2026 |
| 9 | VESTAL POINT CAPITAL, LP | 1974915 | 1.55M | 113.37M | Jun 30, 2026 |
| 10 | ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | 1917529 | 1.51M | 110.72M | Jun 30, 2026 |
| 11 | BLACKROCK FINANCE, INC. | 1364742 | 1.44M | 64.79M | Jun 30, 2024 |
| 12 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 1.37M | 100.13M | Jun 30, 2026 |
| 13 | FRAZIER LIFE SCIENCES MANAGEMENT, L.P. | 1892134 | 1.35M | 99.09M | Jun 30, 2026 |
| 14 | TCG CROSSOVER MANAGEMENT, LLC | 1839948 | 1.34M | 98.14M | Jun 30, 2026 |
| 15 | BVF INC/IL | 1056807 | 1.15M | 84.38M | Jun 30, 2026 |
| 16 | ASSENAGON ASSET MANAGEMENT S.A. | 1546007 | 1.12M | 73.28M | Sep 30, 2026 |
| 17 | NOVO HOLDINGS A/S | 1388325 | 1.09M | 51.24M | Sep 30, 2023 |
| 18 | WOODLINE PARTNERS LP | 1784547 | 958.28K | 70.09M | Jun 30, 2026 |
| 19 | SIREN, L.L.C. | 2005245 | 888.40K | 64.98M | Jun 30, 2026 |
| 20 | LOGOS GLOBAL MANAGEMENT LP | 1792126 | 875K | 64M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.