Who Owns AMER SUPERCONDTR (AMSC)? -- Institutional Holders (2026-06-30)

307 institutions reported holding $1.57B of AMER SUPERCONDTR (AMSC) in SEC 13F filings for 2026-06-30. Largest institutional holders: BlackRock, Inc. ($170.0M), VANGUARD GROUP INC ($160.0M), BARROW HANLEY MEWHINNEY & STRAUSS LLC ($70.7M), UBS Group AG ($59.3M), STATE STREET CORP ($56.4M). Source: SEC Form 13F.

RankInstitutionValueSharesChange
1BlackRock, Inc.$170.0M4.1MAdded
2VANGUARD GROUP INC$160.0M3.9MTrimmed
3BARROW HANLEY MEWHINNEY & STRAUSS LLC$70.7M1.7MAdded
4UBS Group AG$59.3M1.4MAdded
5STATE STREET CORP$56.4M1.4MAdded
6GOLDMAN SACHS GROUP INC$53.7M1.3MAdded
7GEODE CAPITAL MANAGEMENT, LLC$51.6M1.2MAdded
8FIRST TRUST ADVISORS LP$48.5M1.2MAdded
9OBERWEIS ASSET MANAGEMENT INC/$41.0M987,500Added
10JANE STREET GROUP, LLC$40.0M964,219Added
11AWM Investment Company, Inc.$39.5M951,604Added
12BAILLIE GIFFORD & CO$38.7M933,308Trimmed
13EMERALD ADVISERS, LLC$35.0M843,956Added
14Legal & General Group Plc$31.4M756,863Added
15DIMENSIONAL FUND ADVISORS LP$26.8M645,991Trimmed
16MORGAN STANLEY$26.4M635,833Added
17SUSQUEHANNA INTERNATIONAL GROUP, LLP$26.1M628,735Added
18Nuveen, LLC$26.1M628,406Trimmed
19Telemark Asset Management, LLC$24.9M600,000Hold
20ROYCE & ASSOCIATES LP$23.1M555,821Added
21EMERALD MUTUAL FUND ADVISERS TRUST$22.4M538,955Added
22NORTHERN TRUST CORP$18.0M433,792Added
23CITADEL ADVISORS LLC$17.8M429,628Trimmed
24Ranger Investment Management, L.P.$16.8M405,266New
25Stephens Investment Management Group LLC$16.7M402,762Added

Source: SEC Form 13F filings · as of 2026-06-30