SEC Form 4 · Updated Daily

AMSC

— AMERICAN SUPERCONDUCTOR CORPORATION Ownership

Insider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.

FinancialsOwnership

Current Reporting Owners

OwnerRoleShares OwnedAs OfLast Activity
McGahn Daniel PDirector · Officer1,131,9292026-06-11S
Kosiba John W JROfficer334,3772026-06-11S
OLIVER DAVID R JRDirector63,8232026-04-03A
House Arthur HDirector51,7792026-04-03A
Littlefield Barbara G.Director35,4272026-04-03A
Klein Margaret D.Director19,4922026-04-03A
Dambier Laura A.Director14,9922026-06-11S
Donnelly Terence RobertDirector2,6652026-04-03A

Recent Filings

DateOwnerActivitySharesPriceOwned After
2026-06-11McGahn Daniel POpen-market sale4,609$37.851,131,929
2026-06-11McGahn Daniel POpen-market sale11,508$37.281,136,538
2026-06-11Kosiba John W JROpen-market sale1,743$37.85334,377
2026-06-11Kosiba John W JROpen-market sale5,026$37.33336,120
2026-06-11Dambier Laura A.Open-market sale4,000$37.6314,992
2026-06-08McGahn Daniel POpen-market sale4,678$42.191,148,046
2026-06-08McGahn Daniel POpen-market sale4,992$41.391,152,724
2026-06-08Kosiba John W JROpen-market sale1,549$42.35341,146
2026-06-08Kosiba John W JROpen-market sale3,286$41.50342,695
2026-06-03McGahn Daniel POpen-market sale817$50.991,157,716
2026-06-03McGahn Daniel POpen-market sale500$50.291,158,533
2026-06-03McGahn Daniel POpen-market sale4,501$49.251,159,033
2026-06-03McGahn Daniel POpen-market sale7,075$48.311,163,534
2026-06-03Kosiba John W JROpen-market sale609$50.83345,981
2026-06-03Kosiba John W JROpen-market sale2,638$49.28346,590
2026-06-03Kosiba John W JROpen-market sale3,200$48.31349,228
2026-06-02McGahn Daniel POpen-market sale2,305$52.141,170,609
2026-06-02McGahn Daniel POpen-market sale28,558$51.461,172,914
2026-06-02McGahn Daniel POpen-market sale27,900$50.631,201,472
2026-06-02McGahn Daniel POpen-market sale13,762$49.451,229,372
2026-06-02Kosiba John W JROpen-market sale600$52.19352,428
2026-06-02Kosiba John W JROpen-market sale12,036$51.47353,028
2026-06-02Kosiba John W JROpen-market sale12,122$50.62365,064
2026-06-02Kosiba John W JROpen-market sale5,704$49.46377,186
2026-06-01McGahn Daniel PGrant / award60,000$0.001,243,134
2026-06-01Kosiba John W JRGrant / award30,000$0.00382,890
2026-04-03Dambier Laura A.Grant / award3,116$0.0018,992
2026-04-03House Arthur HGrant / award3,116$0.0051,779
2026-04-03Klein Margaret D.Grant / award3,116$0.0019,492
2026-04-03Littlefield Barbara G.Grant / award3,116$0.0035,427
2026-04-03OLIVER DAVID R JRGrant / award3,116$0.0063,823
2026-04-03Donnelly Terence RobertGrant / award2,665$0.002,665
2026-02-24OLIVER DAVID R JROpen-market sale200$34.1060,707
2025-08-08House Arthur HOpen-market sale9,703$50.9248,663
2025-08-06House Arthur HOption exercise (derivative)9,703$0.000
2025-08-06House Arthur HOption exercise9,703$6.8058,366
2025-08-04Kosiba John W JROpen-market sale9,843$55.260
2025-08-04Kosiba John W JROpen-market sale15,740$55.13352,890
2025-08-04Kosiba John W JROpen-market sale34,260$54.34368,630
2025-08-04McGahn Daniel POpen-market sale27,743$55.111,183,134

Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.