About this data
What it is
When a company's officers, directors or owners of more than 10% buy or sell its stock, they must report the trade to the SEC on Form 4. This feed shows purchases and sales on the open market; stock grants, option exercises and shares withheld for tax are left out.
Who files it
The insider, usually through the company, within two business days of the trade.
How current
We collect new filings throughout the day on SEC business days.
Worth knowing
Sales are often routine: insiders sell to diversify, to pay taxes, or under a 10b5-1 plan set up months in advance. A purchase with their own money is less common, which is why many investors pay closer attention to it.

All of this comes from public filings.

Open-market trades per day, last 30 days

05001,000Oct 17 · Purchases: 0Oct 17 · Sales: 0Oct 17Oct 18 · Purchases: 0Oct 18 · Sales: 0Oct 19 · Purchases: 29Oct 19 · Sales: 159Oct 20 · Purchases: 45Oct 20 · Sales: 209Oct 21 · Purchases: 38Oct 21 · Sales: 183Oct 21Oct 22 · Purchases: 50Oct 22 · Sales: 130Oct 23 · Purchases: 77Oct 23 · Sales: 126Oct 24 · Purchases: 1Oct 24 · Sales: 0Oct 25 · Purchases: 0Oct 25 · Sales: 0Oct 25Oct 26 · Purchases: 60Oct 26 · Sales: 171Oct 27 · Purchases: 27Oct 27 · Sales: 217Oct 28 · Purchases: 44Oct 28 · Sales: 135Oct 29 · Purchases: 35Oct 29 · Sales: 199Oct 29Oct 30 · Purchases: 68Oct 30 · Sales: 270Oct 31 · Purchases: 3Oct 31 · Sales: 0Nov 1 · Purchases: 2Nov 1 · Sales: 0Nov 2 · Purchases: 79Nov 2 · Sales: 826Nov 2Nov 3 · Purchases: 66Nov 3 · Sales: 337Nov 4 · Purchases: 67Nov 4 · Sales: 535Nov 5 · Purchases: 108Nov 5 · Sales: 458Nov 6 · Purchases: 137Nov 6 · Sales: 390Nov 6Nov 7 · Purchases: 0Nov 7 · Sales: 0Nov 8 · Purchases: 0Nov 8 · Sales: 0Nov 9 · Purchases: 110Nov 9 · Sales: 457Nov 10 · Purchases: 97Nov 10 · Sales: 406Nov 10Nov 11 · Purchases: 98Nov 11 · Sales: 330Nov 12 · Purchases: 54Nov 12 · Sales: 167Nov 13 · Purchases: 23Nov 13 · Sales: 28Nov 14 · Purchases: 0Nov 14 · Sales: 0Nov 14Nov 15 · Purchases: 0Nov 15 · Sales: 0
05001,000Oct 17 · Purchases: 0Oct 17 · Sales: 0Oct 17Oct 18 · Purchases: 0Oct 18 · Sales: 0Oct 19 · Purchases: 29Oct 19 · Sales: 159Oct 20 · Purchases: 45Oct 20 · Sales: 209Oct 21 · Purchases: 38Oct 21 · Sales: 183Oct 21Oct 22 · Purchases: 50Oct 22 · Sales: 130Oct 23 · Purchases: 77Oct 23 · Sales: 126Oct 24 · Purchases: 1Oct 24 · Sales: 0Oct 25 · Purchases: 0Oct 25 · Sales: 0Oct 25Oct 26 · Purchases: 60Oct 26 · Sales: 171Oct 27 · Purchases: 27Oct 27 · Sales: 217Oct 28 · Purchases: 44Oct 28 · Sales: 135Oct 29 · Purchases: 35Oct 29 · Sales: 199Oct 29Oct 30 · Purchases: 68Oct 30 · Sales: 270Oct 31 · Purchases: 3Oct 31 · Sales: 0Nov 1 · Purchases: 2Nov 1 · Sales: 0Nov 2 · Purchases: 79Nov 2 · Sales: 826Nov 2Nov 3 · Purchases: 66Nov 3 · Sales: 337Nov 4 · Purchases: 67Nov 4 · Sales: 535Nov 5 · Purchases: 108Nov 5 · Sales: 458Nov 6 · Purchases: 137Nov 6 · Sales: 390Nov 6Nov 7 · Purchases: 0Nov 7 · Sales: 0Nov 8 · Purchases: 0Nov 8 · Sales: 0Nov 9 · Purchases: 110Nov 9 · Sales: 457Nov 10 · Purchases: 97Nov 10 · Sales: 406Nov 10Nov 11 · Purchases: 98Nov 11 · Sales: 330Nov 12 · Purchases: 54Nov 12 · Sales: 167Nov 13 · Purchases: 23Nov 13 · Sales: 28Nov 14 · Purchases: 0Nov 14 · Sales: 0Nov 14Nov 15 · Purchases: 0Nov 15 · Sales: 0

Purchases Sales

By trade date. Insiders have two business days to file, so the most recent days fill in later.

Latest open-market insider trades

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Showing: ticker AMSC

Latest open-market insider trades
TradedInsiderCompanyTypeSharesPriceValueFiling
Jun 11, 2026Laura A. Dambier
Director
AMSC
American Superconductor Corporation
Sale4,000$37.63$150.5K SaleForm 4 ↗
Jun 11, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale1,743$37.85$66.0K SaleForm 4 ↗
Jun 11, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale5,026$37.33$187.6K SaleForm 4 ↗
Jun 11, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale4,609$37.85$174.5K SaleForm 4 ↗
Jun 11, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale11,508$37.28$429.0K SaleForm 4 ↗
Jun 8, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale1,549$42.35$65.6K SaleForm 4 ↗
Jun 8, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale3,286$41.50$136.4K SaleForm 4 ↗
Jun 8, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale4,678$42.19$197.4K SaleForm 4 ↗
Jun 8, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale4,992$41.39$206.6K SaleForm 4 ↗
Jun 3, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale609$50.83$31.0K SaleForm 4 ↗
Jun 3, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale2,638$49.28$130.0K SaleForm 4 ↗
Jun 3, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale3,200$48.31$154.6K SaleForm 4 ↗
Jun 3, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale817$50.99$41.7K SaleForm 4 ↗
Jun 3, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale500$50.29$25.1K SaleForm 4 ↗
Jun 3, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale4,501$49.25$221.7K SaleForm 4 ↗
Jun 3, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale7,075$48.31$341.8K SaleForm 4 ↗
Jun 2, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale600$52.19$31.3K SaleForm 4 ↗
Jun 2, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale12,036$51.47$619.5K SaleForm 4 ↗
Jun 2, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale12,122$50.62$613.6K SaleForm 4 ↗
Jun 2, 2026John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale5,704$49.46$282.1K SaleForm 4 ↗
Jun 2, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale2,305$52.14$120.2K SaleForm 4 ↗
Jun 2, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale28,558$51.46$1.5M SaleForm 4 ↗
Jun 2, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale27,900$50.63$1.4M SaleForm 4 ↗
Jun 2, 2026Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale13,762$49.45$680.5K SaleForm 4 ↗
Feb 24, 2026David R. Oliver Jr.
Director
AMSC
American Superconductor Corporation
Sale200$34.10$6,820 SaleForm 4 ↗
Aug 8, 2025Arthur H. House
Director
AMSC
American Superconductor Corporation
Sale9,703$50.92$494.1K SaleForm 4 ↗
Aug 4, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale27,743$55.11$1.5M SaleForm 4 ↗
Aug 4, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale73,105$54.26$4.0M SaleForm 4 ↗
Aug 4, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale9,843$55.26$543.9K SaleForm 4 ↗
Aug 4, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale15,740$55.13$867.7K SaleForm 4 ↗
Aug 4, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale34,260$54.34$1.9M SaleForm 4 ↗
Jun 11, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale500$29.09$14.5K SaleForm 4 ↗
Jun 11, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale12,315$28.56$351.7K SaleForm 4 ↗
Jun 11, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale300$29.08$8,724 SaleForm 4 ↗
Jun 11, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale6,342$28.55$181.1K SaleForm 4 ↗
Jun 6, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale4,744$31.83$151.0K SaleForm 4 ↗
Jun 6, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale7,689$31.82$244.7K SaleForm 4 ↗
May 27, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale98,149$26.60$2.6M SaleForm 4 ↗
May 27, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale24,506$25.55$626.1K SaleForm 4 ↗
May 27, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale39,903$26.61$1.1M SaleForm 4 ↗
May 27, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale10,097$25.55$258.0K SaleForm 4 ↗
May 20, 2025John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale11,860$24.50$290.6K SaleForm 4 ↗
May 20, 2025Daniel P. McGahn
Chairman, President and CEO, Director
AMSC
American Superconductor Corporation
Sale12,815$24.49$313.8K SaleForm 4 ↗
Nov 4, 2024John W. Kosiba Jr.
SVP, CFO & Treasurer
AMSC
American Superconductor Corporation
Sale50,000$28.28$1.4M SaleForm 4 ↗
Aug 4, 2022Margaret D. Klein
Director
AMSC
American Superconductor Corporation
Buy500$5.57$2,785 BuyForm 4 ↗
Jun 18, 2019David R. Oliver Jr.
Director
AMSC
American Superconductor Corporation
Buy200$8.33$1,666 BuyForm 4 ↗

46 items, most recent first (up to 50). Every row links to its original filing. Updated Nov 15, 2026, 4:41 PM EST.

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