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Insider Trading

John W Jr Kosiba Net Worth

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Last Updated: 5 days, 8 hours ago

John W Jr Kosiba has an estimated net worth of at least $19.3 million*, as of June 25, 2025. They own 414,895 shares of AMSC stock. They have sold 319,583 shares of AMSC stock since 2021, for an estimated $5.4 million.

John W Jr Kosiba $AMSC SEC Form 4 Insider Trading

John W Jr Kosiba has filed a total of 19 insider trades in $AMSC since 2021. Their most recent trade was a sale of 4,744 shares, made on Jun 06, 2025. Their largest trade was a sale of 50,132 shares, made on Jun 21, 2023. We estimate that they now own 414,895 shares of $AMSC, worth an estimated $13.9 million.



Insider Trading at $AMSC

There have been a total of 36 insider trades reported at $AMSC since 2021, with 65,000 shares purchased and 723,202 shares sold. The most active insider traders in $AMSC stock have been John W Jr Kosiba, Daniel P Mcgahn, and . The most recent trade was a sale of 500 shares reported by Daniel P McGahn (Chairman, President and CEO), made on Jun 11, 2025.



History of Insider Stock Trades by John W Jr Kosiba

Company Ticker Purchase / Sale Shares Date Disclosed (EST)
AMSC logo AMSC Sale 4,744 Jun 06, 2025 June 9, 2025, 4:57 p.m.
AMSC logo AMSC Sale 10,097 May 27, 2025 May 29, 2025, 5:22 p.m.
AMSC logo AMSC Sale 39,903 May 27, 2025 May 29, 2025, 5:22 p.m.
AMSC logo AMSC Sale 11,860 May 20, 2025 May 22, 2025, 4:47 p.m.
AMSC logo AMSC Sale 50,000 Nov 04, 2024 Nov. 6, 2024, 5:38 p.m.
AMSC logo AMSC Sale 32,000 Jun 11, 2024 June 12, 2024, 9:08 a.m.
AMSC logo AMSC Sale 2,170 May 21, 2024 May 23, 2024, 4:33 p.m.
AMSC logo AMSC Sale 26,830 May 21, 2024 May 23, 2024, 4:33 p.m.
AMSC logo AMSC Sale 29,878 Jun 22, 2023 June 23, 2023, 4:15 p.m.
AMSC logo AMSC Sale 50,132 Jun 21, 2023 June 23, 2023, 4:15 p.m.
AMSC logo AMSC Purchase 15,000 Dec 16, 2022 Dec. 19, 2022, 5:18 p.m.
AMSC logo AMSC Purchase 25,000 Dec 12, 2022 Dec. 13, 2022, 5:17 p.m.
AMSC logo AMSC Sale 8,473 Jun 10, 2022 June 13, 2022, 4:43 p.m.
AMSC logo AMSC Sale 13,325 May 31, 2022 June 2, 2022, 5:36 p.m.
AMSC logo AMSC Sale 22,754 Dec 10, 2021 Dec. 13, 2021, 5:53 p.m.
AMSC logo AMSC Sale 3,766 Nov 01, 2021 Nov. 1, 2021, 8 p.m.
AMSC logo AMSC Sale 6,983 Nov 02, 2021 Nov. 1, 2021, 8 p.m.
AMSC logo AMSC Sale 259 Nov 02, 2021 Nov. 1, 2021, 8 p.m.
AMSC logo AMSC Sale 6,409 Jul 01, 2021 July 5, 2021, 8 p.m.




$AMSC Executives and Stock Owners with Insider Trades



*This is only based off of information found in SEC filings, and may not reflect actual net worth. There may also be inaccuracies due to privately holdings filing errors, parsing errors, accidental double-counting of shares, incorrect classification of indirectly owned shares, sales prior to dataset start date, or any other number of issues.