John W. Kosiba Jr.

Companies

• American SuperconductorChief financial officer Apr 11, 2017 to now¹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• American Superconductor AMSC334,748 shares²$8.6M at $25.59Jun 11, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 11, 2026Sold 1,743 shares at $37.85 of American Superconductor²
• Jun 11, 2026Sold 5,026 shares at $37.33 of American Superconductor²
• Jun 8, 2026Sold 1,549 shares at $42.35 of American Superconductor³
• Jun 8, 2026Sold 3,286 shares at $41.50 of American Superconductor³
• Jun 3, 2026Sold 609 shares at $50.83 of American Superconductor⁴
• Jun 3, 2026Sold 2,638 shares at $49.28 of American Superconductor⁴
• Jun 3, 2026Sold 3,200 shares at $48.31 of American Superconductor⁴
• Jun 2, 2026Sold 600 shares at $52.19 of American Superconductor⁴
• Jun 2, 2026Sold 12,036 shares at $51.47 of American Superconductor⁴
• Jun 2, 2026Sold 12,122 shares at $50.62 of American Superconductor⁴
• Jun 2, 2026Sold 5,704 shares at $49.46 of American Superconductor⁴
• Jun 1, 2026Granted 30,000 shares of American Superconductor⁴
• Aug 4, 2025Sold 9,843 shares at $55.26 of American Superconductor⁵
• Aug 4, 2025Sold 15,740 shares at $55.13 of American Superconductor⁵
• Aug 4, 2025Sold 34,260 shares at $54.34 of American Superconductor⁵
• Jun 11, 2025Sold 300 shares at $29.08 of American Superconductor⁶
• Jun 11, 2025Sold 6,342 shares at $28.55 of American Superconductor⁶
• Jun 6, 2025Sold 4,744 shares at $31.83 of American Superconductor⁷
• May 27, 2025Sold 39,903 shares at $26.61 of American Superconductor⁸
• May 27, 2025Sold 10,097 shares at $25.55 of American Superconductor⁸
• May 20, 2025Sold 11,860 shares at $24.50 of American Superconductor⁹
• May 15, 2025Granted 120,000 shares of American Superconductor¹⁰
• Nov 4, 2024Sold 50,000 shares at $28.28 of American Superconductor¹¹
• Sep 26, 2024Granted 90,000 shares of American Superconductor¹²
• Jun 11, 2024Sold 32,000 shares at $21.68 of American Superconductor¹³