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Business Summary
Filings
Ownership
Valuation
Ownership — IRON
Institutional Holdings
Insider Transactions
US Institutional Ownership
100.0%
Institution
Shares
Value
Ownership %
Change
Filing Date
FMR LLC
4.89M
$357.0M
12.76%
-692.4K
2026-06-30
BlackRock, Inc.
2.47M
$180.0M
6.44%
+194.1K
2026-06-30
RA CAPITAL MANAGEMENT, L.P.
2.45M
$179.0M
6.39%
--
2026-06-30
JPMORGAN CHASE & CO
1.88M
$139.0M
4.89%
+294.7K
2026-06-30
PRICE T ROWE ASSOCIATES INC /MD/
1.88M
$137.0M
4.89%
+326.0K
2026-06-30
WELLINGTON MANAGEMENT GROUP LLP
1.74M
$127.0M
4.54%
+6.0K
2026-06-30
STATE STREET CORP
1.65M
$120.0M
4.30%
-49.4K
2026-06-30
Vestal Point Capital, LP
1.55M
$113.0M
4.04%
+850.0K
2026-06-30
Atlas Venture Life Science Advisors, LLC
1.51M
$110.0M
3.95%
--
2026-06-30
VANGUARD CAPITAL MANAGEMENT LLC
1.37M
$100.0M
3.57%
-6.4K
2026-06-30
Frazier Life Sciences Management, L.P.
1.35M
$99.0M
3.53%
--
2026-06-30
TCG Crossover Management, LLC
1.34M
$98.0M
3.50%
--
2026-06-30
BVF INC/IL
1.15M
$84.0M
3.01%
-118.7K
2026-06-30
Woodline Partners LP
958.3K
$70.0M
2.50%
--
2026-06-30
Siren, L.L.C.
888.4K
$64.0M
2.32%
-100.0K
2026-06-30
Logos Global Management LP
875.0K
$63.0M
2.28%
+315.0K
2026-06-30
Opaleye Management Inc.
855.0K
$62.0M
2.23%
+434.0K
2026-06-30
GEODE CAPITAL MANAGEMENT, LLC
789.7K
$57.0M
2.06%
+45.5K
2026-06-30
DEERFIELD MANAGEMENT COMPANY, L.P.
657.0K
$48.0M
1.71%
--
2026-06-30
DIMENSIONAL FUND ADVISORS LP
569.0K
$41.0M
1.48%
+174.6K
2026-06-30
Bellevue Group AG
560.0K
$40.0M
1.46%
+100.7K
2026-06-30
Saturn V Capital Management LP
524.7K
$38.0M
1.37%
+74.8K
2026-06-30
ARMISTICE CAPITAL, LLC
460.0K
$33.0M
1.20%
-76.0K
2026-06-30
JENNISON ASSOCIATES LLC
439.5K
$32.0M
1.15%
-170.9K
2026-06-30
Aberdeen Group plc
438.2K
$32.0M
1.14%
+62.6K
2026-06-30
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