American Superconductor Corporation (AMSC) has 20 known insider and institutional holders on record. The largest holder is Douglas Michelle with 1,747,930 shares. Other notable holders include McGahn Daniel P and Kosiba John W JR.
Over the last 12 months, insiders have made 19 transactions in AMSC stock — 5 buys (valued at $62.28K) and 12 sells (valued at $7.27M). Insider selling has exceeded buying during this period.
AMSC Insider Ownership
Top Holder
Douglas Michelle
1,747,930 shares
Buys (12 mo)
5
$62.28K value
Sells (12 mo)
12
$7.27M value
12-Month Transaction Activity
Top Insider Holders
| # |
Name |
Role |
Shares Owned |
Last Filed |
Relative Size |
| 1 |
Douglas Michelle |
10 Percent Owner |
1,747,930 |
2010-12-21 |
|
| 2 |
Mcgahn Daniel P |
Chairman, President and CEO |
1,183,134 |
2025-08-06 |
|
| 3 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
402,890 |
2025-06-12 |
|
| 4 |
Douglas Kevin |
10 Percent Owner |
204,100 |
2015-05-04 |
|
| 5 |
Crisp Peter O |
Director |
118,603 |
2011-12-15 |
|
| 6 |
Stankiewicz Charles W |
EVP & GM, Amsc Power Systems |
65,331 |
2011-08-25 |
|
| 7 |
Henry David A |
EVP, CFO & Treasurer |
61,929 |
2016-08-22 |
|
| 8 |
Oliver David R Jr |
Director |
60,707 |
2026-02-26 |
|
| 9 |
Budhraja Vikram S |
Director |
59,299 |
2022-06-13 |
|
| 10 |
House Arthur H |
Director |
48,663 |
2025-08-08 |
|
| 11 |
Poor Timothy D. |
EVP, Windtec Solutions |
44,705 |
2013-01-03 |
|
| 12 |
Maguire James F |
EVP, Operations |
44,446 |
2016-08-22 |
|
| 13 |
Drouin Richard |
Director |
39,000 |
2014-04-03 |
|
| 14 |
Wood John W Jr |
Director |
36,245 |
2019-05-24 |
|
| 15 |
Santamaria Angelo R |
SVP Global Manufacturing |
33,668 |
2011-08-12 |
|
| 16 |
Littlefield Barbara G. |
Director |
32,311 |
2025-04-04 |
|
| 17 |
Lenehan Pamela F |
Director |
27,172 |
2018-07-30 |
|
| 18 |
Dicecco Susan J |
SVP, Corporate Administration |
22,857 |
2013-01-03 |
|
| 19 |
Sande John Vander |
Director |
22,234 |
2017-08-08 |
|
| 20 |
Collett John R |
SVP, Chief Strategy Officer |
18,000 |
2010-05-14 |
|
Recent Transactions (last 12 months)
| Date |
Name |
Role |
Type |
Shares |
Price |
Value |
| 2026-02-24 |
Oliver David R Jr |
Director |
Informative Sell |
200 |
$34.10 |
$6.82K |
| 2019-06-18 |
Oliver David R Jr |
Director |
Informative Buy |
200 |
$8.33 |
$1.67K |
| 2025-08-08 |
House Arthur H |
Director |
Informative Sell |
9,703 |
$50.92 |
$494.08K |
| 2025-08-06 |
House Arthur H |
Director |
Option Exercise (Sell) |
9,703 |
$6.80 |
$65.98K |
| 2022-08-04 |
Klein Margaret D. |
Director |
Informative Buy |
500 |
$5.57 |
$2.78K |
| 2025-08-04 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
Informative Sell |
9,843 |
$55.26 |
$543.92K |
| 2025-08-04 |
Mcgahn Daniel P |
Chairman, President and CEO |
Informative Sell |
27,743 |
$55.11 |
$1.53M |
| 2025-06-11 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
Informative Sell |
300 |
$29.08 |
$8.72K |
| 2025-06-11 |
Mcgahn Daniel P |
Chairman, President and CEO |
Informative Sell |
500 |
$29.09 |
$14.55K |
| 2025-06-06 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
Informative Sell |
4,744 |
$31.83 |
$151.01K |
| 2025-06-06 |
Mcgahn Daniel P |
Chairman, President and CEO |
Informative Sell |
7,689 |
$31.82 |
$244.67K |
| 2025-05-27 |
Donnelly Terence Robert |
Director |
RSU Award |
2,112 |
$27.38 |
$57.83K |
| 2025-05-27 |
Donnelly Terence Robert |
Officer |
Unknown |
- |
- |
- |
| 2025-05-27 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
Informative Sell |
39,903 |
$26.61 |
$1.06M |
| 2025-05-27 |
Mcgahn Daniel P |
Chairman, President and CEO |
Informative Sell |
98,149 |
$26.60 |
$2.61M |
| 2025-05-20 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
Informative Sell |
11,860 |
$24.50 |
$290.53K |
| 2025-05-20 |
Mcgahn Daniel P |
Chairman, President and CEO |
Informative Sell |
12,815 |
$24.49 |
$313.88K |
| 2025-05-15 |
Kosiba John W Jr |
SVP, CFO & Treasurer |
RSU Award |
120,000 |
- |
- |
| 2025-05-15 |
Mcgahn Daniel P |
Chairman, President and CEO |
RSU Award |
240,000 |
- |
- |
