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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — ASMB
Institutional Holdings
Insider Transactions
US Institutional Ownership
48.3%
Institution
Shares
Value
Ownership %
Change
Filing Date
RA CAPITAL MANAGEMENT, L.P.
1.02M
$28.0M
6.42%
--
2026-03-31
Commodore Capital LP
1.00M
$27.0M
6.29%
--
2026-03-31
JANUS HENDERSON GROUP PLC
849.3K
$23.0M
5.34%
+11.4K
2026-03-31
Paradigm Biocapital Advisors LP
665.3K
$18.0M
4.19%
--
2026-03-31
VANGUARD CAPITAL MANAGEMENT LLC
490.4K
$13.0M
3.09%
--
2026-03-31
Parkman Healthcare Partners LLC
411.2K
$11.0M
2.59%
+161.9K
2026-03-31
Point72 Asset Management, L.P.
344.1K
$9.0M
2.17%
-256.5K
2026-03-31
Blackstone Inc.
296.9K
$8.0M
1.87%
-21.9K
2026-03-31
MILLENNIUM MANAGEMENT LLC
233.7K
$6.0M
1.47%
+135.4K
2026-03-31
BlackRock, Inc.
202.7K
$5.0M
1.28%
+10.4K
2026-03-31
STEMPOINT CAPITAL LP
185.4K
$5.0M
1.17%
+28.7K
2026-03-31
B Group, Inc.
175.7K
$4.0M
1.11%
--
2026-03-31
MARSHALL WACE, LLP
163.4K
$4.0M
1.03%
+34.3K
2026-03-31
ADAGE CAPITAL PARTNERS GP, L.L.C.
161.0K
$4.0M
1.01%
--
2026-03-31
Patient Square Capital LP
136.3K
$3.0M
0.86%
+9.3K
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
133.0K
$3.0M
0.84%
+1.7K
2026-03-31
Schonfeld Strategic Advisors LLC
120.5K
$3.0M
0.76%
+66.3K
2026-03-31
Caption Management, LLC
81.8K
$2.0M
0.51%
-24.8K
2026-03-31
HighVista Strategies LLC
74.7K
$2.0M
0.47%
--
2026-03-31
VANGUARD FIDUCIARY TRUST CO
71.6K
$1.0M
0.45%
--
2026-03-31
Qube Research & Technologies Ltd
69.3K
$1.0M
0.44%
+27.1K
2026-03-31
STATE STREET CORP
56.7K
$1.0M
0.36%
+3.7K
2026-03-31
Seven Fleet Capital Management LP
56.1K
$1.0M
0.35%
+51.8K
2026-03-31
MONIMUS CAPITAL MANAGEMENT, LP
48.4K
$1.0M
0.30%
+10.1K
2026-03-31
GSA CAPITAL PARTNERS LLP
45.0K
$1.0M
0.28%
+32.4K
2026-03-31
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