John W Kosiba JR

AMSC

John W Kosiba JR serves as officer: SVP, CFO & Treasurer at American Superconductor Corporation (AMSC). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

2 trades

$135.9K

Total Sells

17 trades

$9.49M

Net Position

Net Seller

$9.35M

Companies Traded

AMSC

Active Period

May 2021 – Jun 2026

19 total trades

Most Recent

Sell AMSC

Jun 11, 2026 · $253.6K

John W Kosiba JR's Insider Trading at American Superconductor Corporation (AMSC)

Buys

2 · $135.9K

Sells

17 · $9.49M

Total Shares Bought

40,000

Total Shares Sold

403,466

AMSC Price Chart

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Date	Type	Shares	Avg Price	Value	Shares After
Jun 11, 2026	Sell	6,769	$37.46	$253.6K	336,120
Jun 10, 2026	Sell	4,835	$41.77	$202.0K	342,695
Aug 4, 2025	Sell	59,843	$54.70	$3.27M	0
Jun 11, 2025	Sell	6,642	$28.57	$189.8K	0
Jun 6, 2025	Sell	4,744	$31.83	$151.0K	0
May 27, 2025	Sell	50,000	$26.40	$1.32M	0
May 20, 2025	Sell	11,860	$24.50	$290.5K	0
Nov 4, 2024	Sell	50,000	$28.28	$1.41M	0
Jun 11, 2024	Sell	32,000	$21.68	$693.8K	0
May 21, 2024	Sell	29,000	$14.82	$429.8K	0
Jun 21, 2023	Sell	80,010	$6.08	$486.3K	0
Dec 16, 2022	Buy	15,000	$3.50	$52.5K	0
Dec 12, 2022	Buy	25,000	$3.34	$83.4K	0
Jun 10, 2022	Sell	8,473	$5.97	$50.6K	0
May 31, 2022	Sell	13,325	$5.45	$72.7K	0
Dec 10, 2021	Sell	22,754	$11.31	$257.4K	0
Nov 1, 2021	Sell	11,008	$18.85	$207.5K	0
Jul 1, 2021	Sell	6,409	$17.66	$113.2K	0
May 20, 2021	Sell	5,794	$14.18	$82.1K	0