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Business Summary
Filings
Ownership
Valuation
Ownership — KPTI
Institutional Holdings
Insider Transactions
US Institutional Ownership
93.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
RA CAPITAL MANAGEMENT, L.P.
1.92M
$18.0M
8.45%
--
2026-06-30
ADAGE CAPITAL PARTNERS GP, L.L.C.
1.52M
$14.0M
6.71%
-285.0K
2026-06-30
ACORN CAPITAL ADVISORS, LLC
1.52M
$14.0M
6.69%
+1.23M
2026-06-30
GOLDMAN SACHS GROUP INC
1.42M
$13.0M
6.28%
+477.1K
2026-06-30
BlackRock, Inc.
1.42M
$13.0M
6.26%
+1.17M
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
959.0K
$9.0M
4.23%
+219.2K
2026-06-30
Catalio Capital Management, LP
940.9K
$9.0M
4.15%
+43.1K
2026-06-30
Avidity Partners Management LP
924.5K
$9.0M
4.08%
+460.7K
2026-06-30
T. Rowe Price Investment Management, Inc.
786.3K
$7.0M
3.47%
-755.8K
2026-06-30
TWO SIGMA INVESTMENTS, LP
695.3K
$6.0M
3.07%
--
2026-06-30
Kalehua Capital Management LLC
685.6K
$6.0M
3.02%
--
2026-06-30
NEA Management Company, LLC
576.8K
$5.0M
2.54%
--
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
531.2K
$5.0M
2.34%
+325.1K
2026-06-30
Ghisallo Capital Management LLC
500.0K
$4.0M
2.20%
--
2026-06-30
Soleus Capital Management, L.P.
440.0K
$4.0M
1.94%
--
2026-06-30
Caption Management, LLC
378.2K
$3.0M
1.67%
-803.7K
2026-06-30
UBS Group AG
353.5K
$3.0M
1.56%
+159.5K
2026-06-30
MILLENNIUM MANAGEMENT LLC
341.7K
$3.0M
1.51%
-169.9K
2026-06-30
STATE STREET CORP
326.0K
$3.0M
1.44%
+245.2K
2026-06-30
Brevan Howard Capital Management LP
309.8K
$3.0M
1.37%
+97.5K
2026-06-30
Boxer Capital Management, LLC
302.5K
$2.0M
1.33%
--
2026-06-30
SILVERARC CAPITAL MANAGEMENT, LLC
297.5K
$2.0M
1.31%
--
2026-06-30
Eversept Partners, LP
276.2K
$2.0M
1.22%
-23.8K
2026-06-30
Tetragon Partners GP Ltd
250.3K
$2.0M
1.10%
+147.3K
2026-06-30
JPMORGAN CHASE & CO
207.6K
$2.0M
0.92%
+205.9K
2026-06-30
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