NEWTON, MA
KARYOPHARM THERAPEUTICS INC.KPTI— Latest position per institution from SEC 13F filings
15
Institutional holders
21.96M
Total shares held
177.98M
Estimated value
1.10M
Avg. position size
IKARIAN CAPITAL, LLC
CIK 1778253
Shares
2.57M
Value
14.33M
Filed
Mar 31, 2026
COMMODORE CAPITAL LP
CIK 1831942
Shares
1.95M
Value
10.86M
Filed
Mar 31, 2026
RA CAPITAL MANAGEMENT, L.P.
CIK 1346824
Shares
1.92M
Value
18.73M
Filed
Jun 30, 2026
ADAGE CAPITAL PARTNERS GP, L.L.C.
CIK 1165408
Shares
1.52M
Value
14.86M
Filed
Jun 30, 2026
ACORN CAPITAL ADVISORS, LLC
CIK 2054410
Shares
1.52M
Value
14.83M
Filed
Jun 30, 2026
GOLDMAN SACHS GROUP INC
CIK 886982
Shares
1.42M
Value
13.92M
Filed
Jun 30, 2026
BLACKROCK, INC.
CIK 2012383
Shares
1.42M
Value
13.86M
Filed
Jun 30, 2026
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
Shares
958.98K
Value
9.37M
Filed
Jun 30, 2026
CATALIO CAPITAL MANAGEMENT, LP
CIK 1958125
Shares
940.86K
Value
9.19M
Filed
Jun 30, 2026
OPALEYE MANAGEMENT INC.
CIK 1595855
Shares
930K
Value
6.84M
Filed
Dec 31, 2025
AVIDITY PARTNERS MANAGEMENT LP
CIK 1791827
Shares
924.49K
Value
9.03M
Filed
Jun 30, 2026
T. ROWE PRICE INVESTMENT MANAGEMENT, INC.
CIK 1897612
Shares
786.31K
Value
7.68K
Filed
Jun 30, 2026
BOOTHBAY FUND MANAGEMENT, LLC
CIK 1549230
Shares
750.41K
Value
4.18M
Filed
Mar 31, 2026
SQUADRON CAPITAL MANAGEMENT LLC
CIK 2050709
Shares
750K
Value
4.18M
Filed
Mar 31, 2026
TWO SIGMA INVESTMENTS, LP
CIK 1179392
Shares
695.26K
Value
6.79M
Filed
Jun 30, 2026
KALEHUA CAPITAL MANAGEMENT LLC
CIK 2106181
Shares
685.64K
Value
6.70M
Filed
Jun 30, 2026
NEA MANAGEMENT COMPANY, LLC
CIK 1512848
Shares
576.78K
Value
5.64M
Filed
Jun 30, 2026
VANGUARD GROUP INC
CIK 102909
Shares
559.62K
Value
4.12M
Filed
Dec 31, 2025
SUSQUEHANNA INTERNATIONAL GROUP, LLP
CIK 1446194
Shares
545.70K
Value
5.33M
Filed
Jun 30, 2026
GEODE CAPITAL MANAGEMENT, LLC
CIK 1214717
Shares
531.23K
Value
5.19M
Filed
Jun 30, 2026
| # | Institution | CIK | Shares | Est. Value | Period |
|---|---|---|---|---|---|
| 1 | IKARIAN CAPITAL, LLC | 1778253 | 2.57M | 14.33M | Mar 31, 2026 |
| 2 | COMMODORE CAPITAL LP | 1831942 | 1.95M | 10.86M | Mar 31, 2026 |
| 3 | RA CAPITAL MANAGEMENT, L.P. | 1346824 | 1.92M | 18.73M | Jun 30, 2026 |
| 4 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 1165408 | 1.52M | 14.86M | Jun 30, 2026 |
| 5 | ACORN CAPITAL ADVISORS, LLC | 2054410 | 1.52M | 14.83M | Jun 30, 2026 |
| 6 | GOLDMAN SACHS GROUP INC | 886982 | 1.42M | 13.92M | Jun 30, 2026 |
| 7 | BLACKROCK, INC. | 2012383 | 1.42M | 13.86M | Jun 30, 2026 |
| 8 | VANGUARD CAPITAL MANAGEMENT LLC | 2100119 | 958.98K | 9.37M | Jun 30, 2026 |
| 9 | CATALIO CAPITAL MANAGEMENT, LP | 1958125 | 940.86K | 9.19M | Jun 30, 2026 |
| 10 | OPALEYE MANAGEMENT INC. | 1595855 | 930K | 6.84M | Dec 31, 2025 |
| 11 | AVIDITY PARTNERS MANAGEMENT LP | 1791827 | 924.49K | 9.03M | Jun 30, 2026 |
| 12 | T. ROWE PRICE INVESTMENT MANAGEMENT, INC. | 1897612 | 786.31K | 7.68K | Jun 30, 2026 |
| 13 | BOOTHBAY FUND MANAGEMENT, LLC | 1549230 | 750.41K | 4.18M | Mar 31, 2026 |
| 14 | SQUADRON CAPITAL MANAGEMENT LLC | 2050709 | 750K | 4.18M | Mar 31, 2026 |
| 15 | TWO SIGMA INVESTMENTS, LP | 1179392 | 695.26K | 6.79M | Jun 30, 2026 |
| 16 | KALEHUA CAPITAL MANAGEMENT LLC | 2106181 | 685.64K | 6.70M | Jun 30, 2026 |
| 17 | NEA MANAGEMENT COMPANY, LLC | 1512848 | 576.78K | 5.64M | Jun 30, 2026 |
| 18 | VANGUARD GROUP INC | 102909 | 559.62K | 4.12M | Dec 31, 2025 |
| 19 | SUSQUEHANNA INTERNATIONAL GROUP, LLP | 1446194 | 545.70K | 5.33M | Jun 30, 2026 |
| 20 | GEODE CAPITAL MANAGEMENT, LLC | 1214717 | 531.23K | 5.19M | Jun 30, 2026 |
Data sourced from SEC Form 13F institutional holdings reports. Positions reflect the most recent filing per institution.