LEXINGTON, MA
KEROS THERAPEUTICS, INC.KROS— Latest position per institution from SEC 13F filings
15
Institutional holders
25.11M
Total shares held
431.27M
Estimated value
1.26M
Avg. position size
BLACKROCK, INC.
CIK 2012383
Shares
2.79M
Value
29.90M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
2.51M
Value
114.86M
Filed
Jun 30, 2024
WESTERN STANDARD LLC
CIK 1517666
Shares
2.19M
Value
34.64M
Filed
Sep 30, 2025
BRAIDWELL LP
CIK 1920938
Shares
1.89M
Value
29.99M
Filed
Dec 31, 2024
DARWIN GLOBAL MANAGEMENT, LTD.
CIK 1839209
Shares
1.69M
Value
26.71M
Filed
Dec 31, 2024
VANGUARD GROUP INC
CIK 102909
Shares
1.53M
Value
31.06M
Filed
Dec 31, 2025
TANG CAPITAL MANAGEMENT LLC
CIK 1232621
Shares
1.42M
Value
22.45M
Filed
Sep 30, 2025
NANTAHALA CAPITAL MANAGEMENT, LLC
CIK 1472322
Shares
1.41M
Value
15.09M
Filed
Jun 30, 2026
HOLOCENE ADVISORS, LP
CIK 1700574
Shares
1.20M
Value
19M
Filed
Dec 31, 2024
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
967.86K
Value
10.36M
Filed
Jun 30, 2026
JEFFERIES FINANCIAL GROUP INC.
CIK 96223
Shares
866.74K
Value
13.72M
Filed
Dec 31, 2024
ALKEON CAPITAL MANAGEMENT LLC
CIK 1230239
Shares
850.51K
Value
13.46M
Filed
Sep 30, 2025
LOGOS GLOBAL MANAGEMENT LP
CIK 1792126
Shares
850K
Value
13.45M
Filed
Sep 30, 2025
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
833.60K
Value
8.92M
Filed
Jun 30, 2026
ORBIMED ADVISORS LLC
CIK 1055951
Shares
759.15K
Value
8.12M
Filed
Jun 30, 2026
MANGROVE PARTNERS IM, LLC
CIK 1535392
Shares
736.38K
Value
11.66M
Filed
Dec 31, 2024
FEDERATED HERMES, INC.
CIK 1056288
Shares
700.43K
Value
7.49M
Filed
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
CIK 2100121
Shares
652.63K
Value
6.98M
Filed
Jun 30, 2026
MACKENZIE FINANCIAL CORP
CIK 919859
Shares
628.44K
Value
6.72M
Filed
Jun 30, 2026
MADISON AVENUE PARTNERS, LP
CIK 1801265
Shares
626.58K
Value
6.70M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | BLACKROCK, INC. | 2012383 | 2.79M | 29.90M | Jun 30, 2026 |
| 2 | BLACKROCK FINANCE, INC. | 1364742 | 2.51M | 114.86M | Jun 30, 2024 |
| 3 | WESTERN STANDARD LLC | 1517666 | 2.19M | 34.64M | Sep 30, 2025 |
| 4 | BRAIDWELL LP | 1920938 | 1.89M | 29.99M | Dec 31, 2024 |
| 5 | DARWIN GLOBAL MANAGEMENT, LTD. | 1839209 | 1.69M | 26.71M | Dec 31, 2024 |
| 6 | VANGUARD GROUP INC | 102909 | 1.53M | 31.06M | Dec 31, 2025 |
| 7 | TANG CAPITAL MANAGEMENT LLC | 1232621 | 1.42M | 22.45M | Sep 30, 2025 |
| 8 | NANTAHALA CAPITAL MANAGEMENT, LLC | 1472322 | 1.41M | 15.09M | Jun 30, 2026 |
| 9 | HOLOCENE ADVISORS, LP | 1700574 | 1.20M | 19M | Dec 31, 2024 |
| 10 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 967.86K | 10.36M | Jun 30, 2026 |
| 11 | JEFFERIES FINANCIAL GROUP INC. | 96223 | 866.74K | 13.72M | Dec 31, 2024 |
| 12 | ALKEON CAPITAL MANAGEMENT LLC | 1230239 | 850.51K | 13.46M | Sep 30, 2025 |
| 13 | LOGOS GLOBAL MANAGEMENT LP | 1792126 | 850K | 13.45M | Sep 30, 2025 |
| 14 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 833.60K | 8.92M | Jun 30, 2026 |
| 15 | ORBIMED ADVISORS LLC | 1055951 | 759.15K | 8.12M | Jun 30, 2026 |
| 16 | MANGROVE PARTNERS IM, LLC | 1535392 | 736.38K | 11.66M | Dec 31, 2024 |
| 17 | FEDERATED HERMES, INC. | 1056288 | 700.43K | 7.49M | Jun 30, 2026 |
| 18 | VANGUARD PORTFOLIO MANAGEMENT LLC | 2100121 | 652.63K | 6.98M | Jun 30, 2026 |
| 19 | MACKENZIE FINANCIAL CORP | 919859 | 628.44K | 6.72M | Jun 30, 2026 |
| 20 | MADISON AVENUE PARTNERS, LP | 1801265 | 626.58K | 6.70M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.