BALA CYNWYD, PA
LARIMAR THERAPEUTICS, INC.LRMR— Latest position per institution from SEC 13F filings
15
Institutional holders
103.77M
Total shares held
339.60M
Estimated value
5.19M
Avg. position size
DEERFIELD MANAGEMENT COMPANY, L.P.
CIK 1009258
Shares
35.61M
Value
108.60M
Filed
Jun 30, 2026
BLUE OWL CAPITAL HOLDINGS LP
CIK 1858703
Shares
9.16M
Value
27.95M
Filed
Jun 30, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
6.05M
Value
19.53M
Filed
Sep 30, 2025
BLACKROCK, INC.
CIK 2012383
Shares
5.68M
Value
17.32M
Filed
Jun 30, 2026
JANUS HENDERSON GROUP LTD.
CIK 1274173
Shares
5.57M
Value
13.07M
Filed
Mar 31, 2025
OPALEYE MANAGEMENT INC.
CIK 1595855
Shares
3.72M
Value
10.56M
Filed
Sep 30, 2025
DEFILADE CAPITAL MANAGEMENT, L.P.
CIK 2088557
Shares
3.67M
Value
11.19M
Filed
Jun 30, 2026
CHI ADVISORS LLC
CIK 1791468
Shares
3.41M
Value
13.49M
Filed
Sep 30, 2023
DRIEHAUS CAPITAL MANAGEMENT LLC
CIK 938206
Shares
3.16M
Value
9.65M
Filed
Jun 30, 2026
BLACKROCK FINANCE, INC.
CIK 1364742
Shares
3.13M
Value
22.72M
Filed
Jun 30, 2024
VANGUARD GROUP INC
CIK 102909
Shares
3.05M
Value
11.61M
Filed
Dec 31, 2025
AIGH CAPITAL MANAGEMENT LLC
CIK 1835943
Shares
3M
Value
13.50M
Filed
Mar 31, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
2.97M
Value
9.07M
Filed
Jun 30, 2026
RTW INVESTMENTS, LP
CIK 1493215
Shares
2.57M
Value
7.83M
Filed
Jun 30, 2026
LOGOS GLOBAL MANAGEMENT LP
CIK 1792126
Shares
2.50M
Value
8.07M
Filed
Sep 30, 2025
AQR CAPITAL MANAGEMENT LLC
CIK 1167557
Shares
2.37M
Value
7.23M
Filed
Jun 30, 2026
PERCEPTIVE ADVISORS LLC
CIK 1224962
Shares
2.28M
Value
10.33M
Filed
Mar 31, 2023
MARSHALL WACE, LLP
CIK 1318757
Shares
2.01M
Value
6.14M
Filed
Jun 30, 2026
DAFNA CAPITAL MANAGEMENT LLC
CIK 1389933
Shares
2.01M
Value
6.12M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.84M
Value
5.62M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | DEERFIELD MANAGEMENT COMPANY, L.P. | 1009258 | 35.61M | 108.60M | Jun 30, 2026 |
| 2 | BLUE OWL CAPITAL HOLDINGS LP | 1858703 | 9.16M | 27.95M | Jun 30, 2026 |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 6.05M | 19.53M | Sep 30, 2025 |
| 4 | BLACKROCK, INC. | 2012383 | 5.68M | 17.32M | Jun 30, 2026 |
| 5 | JANUS HENDERSON GROUP LTD. | 1274173 | 5.57M | 13.07M | Mar 31, 2025 |
| 6 | OPALEYE MANAGEMENT INC. | 1595855 | 3.72M | 10.56M | Sep 30, 2025 |
| 7 | DEFILADE CAPITAL MANAGEMENT, L.P. | 2088557 | 3.67M | 11.19M | Jun 30, 2026 |
| 8 | CHI ADVISORS LLC | 1791468 | 3.41M | 13.49M | Sep 30, 2023 |
| 9 | DRIEHAUS CAPITAL MANAGEMENT LLC | 938206 | 3.16M | 9.65M | Jun 30, 2026 |
| 10 | BLACKROCK FINANCE, INC. | 1364742 | 3.13M | 22.72M | Jun 30, 2024 |
| 11 | VANGUARD GROUP INC | 102909 | 3.05M | 11.61M | Dec 31, 2025 |
| 12 | AIGH CAPITAL MANAGEMENT LLC | 1835943 | 3M | 13.50M | Mar 31, 2026 |
| 13 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 2.97M | 9.07M | Jun 30, 2026 |
| 14 | RTW INVESTMENTS, LP | 1493215 | 2.57M | 7.83M | Jun 30, 2026 |
| 15 | LOGOS GLOBAL MANAGEMENT LP | 1792126 | 2.50M | 8.07M | Sep 30, 2025 |
| 16 | AQR CAPITAL MANAGEMENT LLC | 1167557 | 2.37M | 7.23M | Jun 30, 2026 |
| 17 | PERCEPTIVE ADVISORS LLC | 1224962 | 2.28M | 10.33M | Mar 31, 2023 |
| 18 | MARSHALL WACE, LLP | 1318757 | 2.01M | 6.14M | Jun 30, 2026 |
| 19 | DAFNA CAPITAL MANAGEMENT LLC | 1389933 | 2.01M | 6.12M | Jun 30, 2026 |
| 20 | GOLDMAN SACHS GROUP INC | 886982 | 1.84M | 5.62M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.