American Superconductor Corp /De/ (AMSC) Insider Ownership

Historic Insider Ownership Trends

As of March 23, 2026, American Superconductor's top three insider holders are Daniel P Mcgahn (Chairman, President And Ceo, 1.18Mn shares), John W Jr Kosiba (Svp, Cfo Treasurer, 352.89K shares), David R Jr Oliver (Director, 60.71K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Daniel P Mcgahn Chairman, President And Ceo 1,183,134 0 06 Aug, 2025
John W Jr Kosiba Svp, Cfo Treasurer 352,890 0 06 Aug, 2025
David R Jr Oliver 60,707 0 26 Feb, 2026
Vikram S Budhraja 59,299 0 13 Jun, 2022
Arthur H House 48,663 0 08 Aug, 2025
Barbara G. Littlefield 32,311 0 04 Apr, 2025
Laura A. Dambier 15,876 0 04 Apr, 2025
Margaret D. Klein 15,876 0 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
24 Feb, 2026 David R Jr Oliver Common Stock D 200 $34.10 60,707 D S
06 Aug, 2025 Arthur H House Common Stock A 9,703 $6.80 58,366 D M
08 Aug, 2025 Arthur H House Common Stock D 9,703 $50.92 48,663 D S
06 Aug, 2025 Arthur H House Stock Options (Right to Buy) D 9,703 $0.00 0 D M
04 Aug, 2025 John W Jr Kosiba Common Stock D 34,260 $54.34 368,630 D S
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 15,740 $55.13 352,890 D S
04 Aug, 2025 John W Jr Kosiba Common Stock D 9,843 $55.26 0 I S
11 Jun, 2025 John W Jr Kosiba Common Stock D 6,342 $28.55 403,190 D S
11 Jun, 2025 Daniel P Mcgahn Common Stock D 12,315 $28.56 1,284,482 D S
11 Jun, 2025 John W Jr Kosiba Common Stock D 300 $29.08 402,890 D S
11 Jun, 2025 Daniel P Mcgahn Common Stock D 500 $29.09 1,283,982 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 Terence Robert Donnelly Stock Options (Right to Buy) A 2,112 $0.00 2,112 D A
27 May, 2025 John W Jr Kosiba Common Stock D 10,097 $25.55 454,179 D S
27 May, 2025 Daniel P Mcgahn Common Stock D 24,506 $25.55 1,402,635 D S
27 May, 2025 Daniel P Mcgahn Common Stock D 98,149 $26.60 1,304,486 D S
27 May, 2025 John W Jr Kosiba Common Stock D 39,903 $26.61 414,276 D S