American Superconductor Corp /De/ (AMSC) Insider Ownership

Historic Insider Ownership Trends

Data spanning the past 90 days through February 19, 2026 reveals that American Superconductor's three principal insider shareholders consist of Chairman And President And Ceo Daniel P Mcgahn (1.18Mn shares), Svp And Cfo & Treasurer John W Jr Kosiba (352.89K shares), Director David R Jr Oliver (60.71K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares Report Date
Daniel P Mcgahn Chairman And President And Ceo 1,183,134 06 Aug, 2025
John W Jr Kosiba Svp And Cfo & Treasurer 352,890 06 Aug, 2025
David R Jr Oliver 60,707 04 Apr, 2025
Vikram S Budhraja 59,299 13 Jun, 2022
Arthur H House 48,663 08 Aug, 2025
Barbara G. Littlefield 32,311 04 Apr, 2025
Laura A. Dambier 15,876 04 Apr, 2025
Margaret D. Klein 15,876 04 Apr, 2025

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
08 Aug, 2025 Arthur H House Common Stock D 9,703 $50.92 48,663 D S
06 Aug, 2025 Arthur H House Common Stock A 9,703 $6.80 58,366 D M
04 Aug, 2025 Daniel P Mcgahn Common Stock D 73,105 $54.26 1,210,877 D S
04 Aug, 2025 Daniel P Mcgahn Common Stock D 27,743 $55.11 1,183,134 D S
04 Aug, 2025 John W Jr Kosiba Common Stock D 34,260 $54.34 368,630 D S
04 Aug, 2025 John W Jr Kosiba Common Stock D 9,843 $55.26 0 I S
04 Aug, 2025 John W Jr Kosiba Common Stock D 15,740 $55.13 352,890 D S
11 Jun, 2025 Daniel P Mcgahn Common Stock D 12,315 $28.56 1,284,482 D S
11 Jun, 2025 Daniel P Mcgahn Common Stock D 500 $29.09 1,283,982 D S
11 Jun, 2025 John W Jr Kosiba Common Stock D 6,342 $28.55 403,190 D S
11 Jun, 2025 John W Jr Kosiba Common Stock D 300 $29.08 402,890 D S
06 Jun, 2025 Daniel P Mcgahn Common Stock D 7,689 $31.82 1,296,797 D S
06 Jun, 2025 John W Jr Kosiba Common Stock D 4,744 $31.83 409,532 D S
27 May, 2025 Daniel P Mcgahn Common Stock D 98,149 $26.60 1,304,486 D S
27 May, 2025 Daniel P Mcgahn Common Stock D 24,506 $25.55 1,402,635 D S
27 May, 2025 John W Jr Kosiba Common Stock D 10,097 $25.55 454,179 D S
27 May, 2025 John W Jr Kosiba Common Stock D 39,903 $26.61 414,276 D S
20 May, 2025 Daniel P Mcgahn Common Stock D 12,815 $24.49 1,427,141 D S
20 May, 2025 John W Jr Kosiba Common Stock D 11,860 $24.50 464,276 D S
15 May, 2025 Daniel P Mcgahn Common Stock A 240,000 $0.00 1,439,956 D A