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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — FHTX
Institutional Holdings
Insider Transactions
US Institutional Ownership
75.5%
Institution
Shares
Value
Ownership %
Change
Filing Date
Flagship Pioneering Inc.
12.67M
$60.0M
21.59%
--
2026-03-31
FMR LLC
6.05M
$28.0M
10.30%
+650.4K
2026-03-31
BVF INC/IL
5.84M
$27.0M
9.95%
+540.0K
2026-03-31
DEERFIELD MANAGEMENT COMPANY, L.P.
4.39M
$21.0M
7.48%
+745.2K
2026-03-31
RAYMOND JAMES FINANCIAL INC
2.60M
$12.0M
4.43%
+96.6K
2026-03-31
BlackRock, Inc.
2.36M
$11.0M
4.03%
+15.0K
2026-03-31
Euclidean Capital LLC
1.57M
$7.0M
2.68%
--
2026-03-31
VANGUARD CAPITAL MANAGEMENT LLC
1.50M
$7.0M
2.55%
--
2026-03-31
GEODE CAPITAL MANAGEMENT, LLC
848.2K
$4.0M
1.44%
+53.1K
2026-03-31
Siren, L.L.C.
720.7K
$3.0M
1.23%
--
2026-03-31
STATE STREET CORP
679.8K
$3.0M
1.16%
+61.1K
2026-03-31
AMERIPRISE FINANCIAL INC
449.0K
$2.0M
0.76%
-158.7K
2026-03-31
RENAISSANCE TECHNOLOGIES LLC
406.4K
$1.0M
0.69%
+108.7K
2026-03-31
Candriam S.C.A.
313.8K
$1.0M
0.53%
--
2026-03-31
JACOBS LEVY EQUITY MANAGEMENT, INC
303.8K
$1.0M
0.52%
+34.6K
2026-03-31
Birchview Capital, LP
281.7K
$1.0M
0.48%
--
2026-03-31
NORTHERN TRUST CORP
275.9K
$1.0M
0.47%
+13.4K
2026-03-31
VANGUARD PORTFOLIO MANAGEMENT LLC
255.9K
$1.0M
0.44%
--
2026-03-31
VANGUARD FIDUCIARY TRUST CO
240.6K
$1.0M
0.41%
--
2026-03-31
CITADEL ADVISORS LLC
200.0K
--
0.34%
+17.7K
2026-03-31
Woodline Partners LP
180.3K
--
0.31%
+158.8K
2026-03-31
GOLDMAN SACHS GROUP INC
136.1K
--
0.23%
+17.4K
2026-03-31
Sio Capital Management, LLC
122.9K
--
0.21%
--
2026-03-31
PANAGORA ASSET MANAGEMENT INC
115.1K
--
0.20%
+25.8K
2026-03-31
DAFNA Capital Management LLC
111.9K
--
0.19%
-15.0K
2026-03-31
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