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Overview
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Business Summary
Filings
Ownership
Valuation
Ownership — ASND
Institutional Holdings
Insider Transactions
US Institutional Ownership
89.8%
Institution
Shares
Value
Ownership %
Change
Filing Date
RA CAPITAL MANAGEMENT, L.P.
10.28M
$2.35B
16.96%
--
2026-03-31
Avoro Capital Advisors LLC
5.06M
$1.16B
8.35%
-98.6K
2026-03-31
WESTFIELD CAPITAL MANAGEMENT CO LP
4.81M
$1.10B
7.94%
-372.3K
2026-03-31
FMR LLC
3.88M
$886.0M
6.40%
-276.7K
2026-03-31
Artisan Partners Limited Partnership
3.23M
$738.0M
5.33%
+4.3K
2026-03-31
FRANKLIN RESOURCES INC
2.05M
$469.0M
3.39%
+141.9K
2026-03-31
Capital International Investors
1.96M
$448.0M
3.23%
-1.11M
2026-03-31
MASSACHUSETTS FINANCIAL SERVICES CO /MA/
1.86M
$425.0M
3.07%
-25.7K
2026-03-31
WELLINGTON MANAGEMENT GROUP LLP
1.76M
$402.0M
2.90%
-5.1K
2026-03-31
PERCEPTIVE ADVISORS LLC
1.53M
$350.0M
2.53%
+450.0K
2026-03-31
AMERICAN CENTURY COMPANIES INC
1.40M
$319.0M
2.31%
-46.0K
2026-03-31
Capital World Investors
900.5K
$205.0M
1.49%
--
2026-03-31
PRINCIPAL FINANCIAL GROUP INC
896.4K
$205.0M
1.48%
-130.0K
2026-03-31
AMERIPRISE FINANCIAL INC
888.0K
$203.0M
1.47%
+337.5K
2026-03-31
BlackRock, Inc.
661.1K
$151.0M
1.09%
+32.9K
2026-03-31
Polar Capital Holdings Plc
651.7K
$149.0M
1.08%
+281.2K
2026-03-31
MORGAN STANLEY
606.3K
$138.0M
1.00%
-11.6K
2026-03-31
GOLDMAN SACHS GROUP INC
566.2K
$129.0M
0.93%
-30.5K
2026-03-31
NOMURA ASSET MANAGEMENT INTERNATIONAL INC.
556.4K
$127.0M
0.92%
--
2026-03-31
FIL Ltd
447.4K
$102.0M
0.74%
-31.2K
2026-03-31
Vestal Point Capital, LP
375.0K
$85.0M
0.62%
+200.0K
2026-03-31
Invesco Ltd.
362.1K
$82.0M
0.60%
-224.0K
2026-03-31
SEI INVESTMENTS CO
351.1K
$80.0M
0.58%
+69.7K
2026-03-31
BNP PARIBAS FINANCIAL MARKETS
309.2K
$70.0M
0.51%
+2.1K
2026-03-31
FRED ALGER MANAGEMENT, LLC
304.9K
$69.0M
0.50%
-47.2K
2026-03-31
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