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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — PBLS
Institutional Holdings
Insider Transactions
US Institutional Ownership
80.9%
Institution
Shares
Value
Ownership %
Change
Filing Date
RA CAPITAL MANAGEMENT, L.P.
28.93M
$791.0M
23.73%
--
2026-06-30
FMR LLC
10.29M
$281.0M
8.44%
--
2026-06-30
ARCH Venture Management, LLC
6.41M
$175.0M
5.26%
--
2026-06-30
venBio Partners LLC
5.27M
$144.0M
4.32%
--
2026-06-30
Alphabet Inc.
4.92M
$134.0M
4.03%
--
2026-06-30
Nextech Invest Ltd.
4.66M
$127.0M
3.82%
--
2026-06-30
Cormorant Asset Management, LP
4.62M
$126.0M
3.79%
--
2026-06-30
REGENERON PHARMACEUTICALS, INC.
4.17M
$114.0M
3.42%
--
2026-06-30
Siren, L.L.C.
2.99M
$81.0M
2.45%
--
2026-06-30
FARALLON CAPITAL MANAGEMENT, L.L.C.
2.37M
$64.0M
1.94%
--
2026-06-30
Jupiter Topco LLC
2.30M
$62.0M
1.88%
--
2026-06-30
Frazier Life Sciences Management, L.P.
1.92M
$52.0M
1.58%
--
2026-06-30
DEERFIELD MANAGEMENT COMPANY, L.P.
1.88M
$51.0M
1.54%
--
2026-06-30
General Catalyst Group Management, LLC
1.60M
$43.0M
1.31%
--
2026-06-30
GENERAL ATLANTIC, L.P.
1.54M
$42.0M
1.26%
--
2026-06-30
Soleus Capital Management, L.P.
1.47M
$40.0M
1.20%
--
2026-06-30
VANGUARD PORTFOLIO MANAGEMENT LLC
1.30M
$35.0M
1.07%
--
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
1.16M
$31.0M
0.95%
--
2026-06-30
JPMORGAN CHASE & CO
1.04M
$30.0M
0.86%
--
2026-06-30
Foresite Capital Management VI LLC
999.0K
$27.0M
0.82%
--
2026-06-30
Catalio Capital Management, LP
824.0K
$22.0M
0.68%
--
2026-06-30
ALLIANCEBERNSTEIN L.P.
810.3K
$22.0M
0.66%
--
2026-06-30
PRICE T ROWE ASSOCIATES INC /MD/
751.9K
$20.0M
0.62%
--
2026-06-30
Casdin Capital, LLC
645.7K
$17.0M
0.53%
--
2026-06-30
Venrock Adviser, LLC
625.0K
$17.0M
0.51%
--
2026-06-30
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