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Business Summary
Filings
Ownership
Valuation
Ownership — SRRK
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
FMR LLC
18.00M
$989.0M
14.80%
+752.1K
2026-06-30
Siren, L.L.C.
9.58M
$526.0M
7.87%
-1.25M
2026-06-30
BlackRock, Inc.
9.49M
$522.0M
7.81%
+2.02M
2026-06-30
SAMSARA BIOCAPITAL, LLC
6.90M
$379.0M
5.67%
--
2026-06-30
PRICE T ROWE ASSOCIATES INC /MD/
6.79M
$373.0M
5.59%
+588.2K
2026-06-30
WELLINGTON MANAGEMENT GROUP LLP
6.73M
$369.0M
5.53%
+9.4K
2026-06-30
Orbis Allan Gray Ltd
5.93M
$326.0M
4.88%
+1.75M
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
4.77M
$262.0M
3.92%
+876.5K
2026-06-30
STATE STREET CORP
4.73M
$260.0M
3.89%
+697.4K
2026-06-30
Redmile Group, LLC
4.31M
$237.0M
3.55%
-4.76M
2026-06-30
NORGES BANK
2.77M
$152.0M
2.28%
+690.4K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
2.75M
$151.0M
2.26%
+604.8K
2026-06-30
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
2.61M
$143.0M
2.14%
--
2026-06-30
Bellevue Group AG
2.45M
$134.0M
2.01%
-1.14M
2026-06-30
JENNISON ASSOCIATES LLC
2.36M
$129.0M
1.94%
-981.9K
2026-06-30
Jupiter Topco LLC
2.24M
$123.0M
1.84%
--
2026-06-30
Hood River Capital Management LLC
2.22M
$122.0M
1.83%
+175.1K
2026-06-30
Driehaus Capital Management LLC
2.21M
$121.0M
1.81%
+285.4K
2026-06-30
EVENTIDE ASSET MANAGEMENT, LLC
2.11M
$116.0M
1.74%
-86.0K
2026-06-30
Polar Capital Holdings Plc
1.88M
$103.0M
1.54%
-105.0K
2026-06-30
Holocene Advisors, LP
1.76M
$96.0M
1.44%
-134.9K
2026-06-30
ADAGE CAPITAL PARTNERS GP, L.L.C.
1.73M
$95.0M
1.42%
+1.03M
2026-06-30
MORGAN STANLEY
1.54M
$84.0M
1.27%
+1.32M
2026-06-30
Woodline Partners LP
1.50M
$82.0M
1.23%
--
2026-06-30
GOLDMAN SACHS GROUP INC
1.41M
$77.0M
1.16%
-206
2026-06-30
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