AMSC
AMERICAN SUPERCONDUCTOR CORP
Latest Form 4:Sale$151KbyDambier Laura A. (Director) · filed Jun 12, 2026
AMERICAN SUPERCONDUCTOR CORP (AMSC) has 15 SEC Form 4 filings (34 transaction rows) in the rolling window, disclosed by 4 distinct insiders. Most recent filing: Jun 12, 2026.
Inside the rolling window, 4 insiders at AMERICAN SUPERCONDUCTOR CORP reported 1 open-market purchase totaling $2K and 10 open-market sales totaling $7.8M. The most active filer is SVP, CFO & Treasurer Kosiba John W JR with 4 filings. Insiders have net sold $7.8M over the trailing 6 months. The most recent open-market filing is a sale of 4,000 shares by Director Dambier Laura A., dated Jun 11, 2026, worth $151K.
- Industry:Electrical Equipment & Parts
- CEO:Daniel Patrick McGahn
- Employees:1,195
- HQ:Ayer, MA, US
- IPO:1991-12-12
Insider Buying
$2K
reported purchases (SEC code P)
Insider Selling
$7.8M
reported sales (SEC code S)
Unique Insiders
4
in the rolling window
Market Cap
$1.4B
latest known value
| Source | ||||||
|---|---|---|---|---|---|---|
Dambier Laura A.First filing | Director | Sale | 4,000 | $151K | Jun 12 | SEC ↗ |
| SVP, CFO & Treasurer | Sale | 6,769 | $254K | Jun 11 | SEC ↗ | |
| Chairman, President and CEO | Sale | 16,117 | $604K | Jun 11 | SEC ↗ | |
| SVP, CFO & Treasurer | Sale | 4,835 | $202K | Jun 10 | SEC ↗ | |
| Chairman, President and CEO | Sale | 9,670 | $404K | Jun 10 | SEC ↗ | |
McGahn Daniel PFirst filing | Chairman, President and CEO | Sale | 72,525 | $3.7M | Jun 3 | SEC ↗ |
McGahn Daniel PFirst filing | Chairman, President and CEO | Sale | 12,893 | $630K | Jun 3 | SEC ↗ |
Kosiba John W JRFirst filing | SVP, CFO & Treasurer | Sale | 30,462 | $1.5M | Jun 3 | SEC ↗ |
Kosiba John W JRFirst filing | SVP, CFO & Treasurer | Sale | 6,447 | $316K | Jun 3 | SEC ↗ |
OLIVER DAVID R JRFirst in 4 months | Director | Sale | 200 | $7K | Feb 26 | SEC ↗ |
OLIVER DAVID R JRFirst filing | Director | Purchase | 200 | $2K | Nov 13 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 insider filings does AMSC have?
AMERICAN SUPERCONDUCTOR CORP (AMSC) has 15 SEC Form 4 filings (34 transaction rows) in the rolling 365-day window, disclosed by 4 distinct insiders. Most recent filing: Jun 12, 2026.
When was the most recent SEC Form 4 filing for AMSC?
The most recent Form 4 filing for AMSC on Tracefour is dated Jun 12, 2026.
Who is the most active insider at AMSC?
The most active SEC Form 4 filer at AMSC in the rolling window is SVP, CFO & Treasurer Kosiba John W JR, with 4 filings.
What is the net insider flow at AMSC over the last 6 months?
Over the trailing 180 days, insiders at AMSC have net sold $7.8M based on SEC Form 4 disclosures.
What is the total insider buy and sell value at AMSC in the current window?
Inside the rolling window, insiders at AMSC bought $2K and sold $7.8M based on SEC Form 4 filings.
Can I get alerts for AMSC insider trading?
Yes. Tracefour sends a free email when a new SEC Form 4 purchase or sale is filed at AMERICAN SUPERCONDUCTOR CORP (AMSC). Alerts are set per company from the page itself, there is no paid tier, and each email links to the original filing on SEC EDGAR.
Related companies
AMERICAN SUPERCONDUCTOR CORP is in the Manufacturing sector.