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American Superconductor Corp (AMSC)

Over the past 90 days, American Superconductor Corp. has seen significant insider selling, with a total sell value exceeding $14 million. Notably, the CEO and other key executives have engaged in multiple planned and proposed sales, totaling over 40,000 shares. This activity occurred following a strong earnings beat of 200% in the last reported quarter.
Stock chart
Ticker: AMSC Exchange: NSM


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Purchase Sale Planned purchase Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Dambier Laura A.
1 sale — total 100,000 USD
Sale 11 Jun 2026
Value US$4,352,207.17 | Price 139.51 | Shares 54,443
Planned sale 11 Jun 2026
Value US$3,867,227.94 | Price 237.54 | Shares 42,923
Planned sale 11 Jun 2026
Value US$3,972,100.53 | Price 353.41 | Shares 9,361
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.85 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.28 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.28 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.85 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.85 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.85 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.85 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.33 | Shares 1,000
Planned sale 11 Jun 2026
Value US$100,000.00 | Price 37.33 | Shares 1,000
Proposed sale 11 Jun 2026
Value US$100,000.00 | Price 37.45 | Shares 1,000
Proposed sale 11 Jun 2026
Value US$100,000.00 | Price 37.45 | Shares 1,000
Proposed sale 11 Jun 2026
Value US$100,000.00 | Price 37.46 | Shares 1,000
Proposed sale 11 Jun 2026
Value US$100,000.00 | Price 37.46 | Shares 1,000
Proposed sale 10 Jun 2026
Value US$100,000.00 | Price 40.21 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 42.19 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 42.19 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 41.39 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 42.35 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 42.35 | Shares 1,000
Planned sale 8 Jun 2026
Value US$100,000.00 | Price 41.50 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 41.78 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 41.78 | Shares 1,000
Proposed sale 8 Jun 2026
Value US$100,000.00 | Price 41.77 | Shares 1,000
Proposed sale 3 Jun 2026
Value US$100,000.00 | Price 48.88 | Shares 1,000
Proposed sale 3 Jun 2026
Value US$100,000.00 | Price 48.94 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 50.83 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 49.28 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 48.31 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 50.99 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 50.29 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 49.25 | Shares 1,000
Planned sale 3 Jun 2026
Value US$100,000.00 | Price 48.31 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 52.19 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 51.47 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 50.62 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 49.46 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 52.14 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 51.46 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 50.63 | Shares 1,000
Planned sale 2 Jun 2026
Value US$100,000.00 | Price 49.45 | Shares 1,000
Proposed sale 2 Jun 2026
Value US$100,000.00 | Price 50.77 | Shares 1,000
Proposed sale 2 Jun 2026
Value US$100,000.00 | Price 50.78 | Shares 1,000
Sale 24 Feb 2026
Value US$6,820.00 | Price 34.10 | Shares 200
Proposed sale 8 Aug 2025
Value US$493,451.00 | Price 50.86 | Shares 9,703
Sale 8 Aug 2025
Value US$494,081.61 | Price 50.92 | Shares 9,703
Sale 4 Aug 2025
Value US$543,924.18 | Price 55.26 | Shares 9,843
Sale 4 Aug 2025
Value US$867,733.61 | Price 55.13 | Shares 15,740
Sale 4 Aug 2025
Value US$1,861,722.66 | Price 54.34 | Shares 34,260
Sale 4 Aug 2025
Value US$1,528,819.63 | Price 55.11 | Shares 27,743
Sale 4 Aug 2025
Value US$3,966,706.54 | Price 54.26 | Shares 73,105
Proposed sale 4 Aug 2025
Value US$5,495,574.64 | Price 54.49 | Shares 100,849
Proposed sale 4 Aug 2025
Value US$2,729,455.00 | Price 54.59 | Shares 50,000
Planned sale 11 Jun 2025
Value US$8,724.99 | Price 29.08 | Shares 300
Planned sale 11 Jun 2025
Value US$181,053.32 | Price 28.55 | Shares 6,342
Planned sale 11 Jun 2025
Value US$14,545.00 | Price 29.09 | Shares 500
Planned sale 11 Jun 2025
Value US$351,696.70 | Price 28.56 | Shares 12,315
Proposed sale 11 Jun 2025
Value US$189,778.55 | Price 28.57 | Shares 6,642
Proposed sale 11 Jun 2025
Value US$366,241.17 | Price 28.58 | Shares 12,815
Planned sale 6 Jun 2025
Value US$151,012.43 | Price 31.83 | Shares 4,744
Planned sale 6 Jun 2025
Value US$244,670.13 | Price 31.82 | Shares 7,689
Proposed sale 6 Jun 2025
Value US$244,669.36 | Price 31.82 | Shares 7,689
Proposed sale 6 Jun 2025
Value US$151,011.96 | Price 31.83 | Shares 4,744
Planned sale 27 May 2025
Value US$2,610,783.03 | Price 26.60 | Shares 98,149
Planned sale 27 May 2025
Value US$626,052.33 | Price 25.55 | Shares 24,506
Planned sale 27 May 2025
Value US$1,061,735.03 | Price 26.61 | Shares 39,903
Planned sale 27 May 2025
Value US$258,021.77 | Price 25.55 | Shares 10,097
Proposed sale 27 May 2025
Value US$3,236,831.58 | Price 26.39 | Shares 122,655
Proposed sale 27 May 2025
Value US$1,319,755.00 | Price 26.40 | Shares 50,000
Planned sale 20 May 2025
Value US$290,529.68 | Price 24.50 | Shares 11,860
Planned sale 20 May 2025
Value US$313,877.80 | Price 24.49 | Shares 12,815
Proposed sale 20 May 2025
Value US$290,528.49 | Price 24.50 | Shares 11,860
Proposed sale 20 May 2025
Value US$313,876.51 | Price 24.49 | Shares 12,815
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-06-12 2026-06-11 S Sale Non-Executive Director
54,443 -9.6%
139.51
US$4,352,207
54,443 -9.6% 139.51 US$4,352,207
2026-06-11 2026-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
42,923 -9.1%
237.54
US$3,867,228
42,923 -9.1% 237.54 US$3,867,228
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
66,105 +50.0%
340.76
US$251,292
66,105 +50.0% 340.76 US$251,292
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.5%
37.85
US$100,000
1,000 -0.5% 37.85 US$100,000
2026-06-11 2026-06-11 PrS Proposed sale

Officer; Director

Executive Director
1,000
37.45
US$100,000
1,000 37.45 US$100,000
2026-06-11 2026-06-11 PrS Proposed sale

Officer; Director

Executive Director
1,000
37.45
US$100,000
1,000 37.45 US$100,000
2026-06-11 2026-06-11 PrS Proposed sale

Officer

Officer
1,000
37.46
US$100,000
1,000 37.46 US$100,000
2026-06-11 2026-06-11 PrS Proposed sale

Officer

Officer
1,000
37.46
US$100,000
1,000 37.46 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
37.85
US$100,000
1,000 -0.4% 37.85 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
37.85
US$100,000
1,000 -0.4% 37.85 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -1.0%
37.28
US$100,000
1,000 -1.0% 37.28 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -1.0%
37.28
US$100,000
1,000 -1.0% 37.28 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.5%
37.85
US$100,000
1,000 -0.5% 37.85 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.5%
37.85
US$100,000
1,000 -0.5% 37.85 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -1.5%
37.33
US$100,000
1,000 -1.5% 37.33 US$100,000
2026-06-11 2026-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -1.5%
37.33
US$100,000
1,000 -1.5% 37.33 US$100,000
2026-06-10 2026-06-10 PrS Proposed sale

Director

Non-Executive Director
1,000
40.21
US$100,000
1,000 40.21 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
42.19
US$100,000
1,000 -0.4% 42.19 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.5%
42.35
US$100,000
1,000 -0.5% 42.35 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.5%
42.35
US$100,000
1,000 -0.5% 42.35 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.9%
41.50
US$100,000
1,000 -0.9% 41.50 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
42.19
US$100,000
1,000 -0.4% 42.19 US$100,000
2026-06-10 2026-06-08 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
41.39
US$100,000
1,000 -0.4% 41.39 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale

Officer; Director

Executive Director
1,000
41.78
US$100,000
1,000 41.78 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale

Officer; Director

Executive Director
1,000
41.78
US$100,000
1,000 41.78 US$100,000
2026-06-08 2026-06-08 PrS Proposed sale

Officer

Officer
1,000
41.77
US$100,000
1,000 41.77 US$100,000
2026-06-03 2026-06-03 PrS Proposed sale

Officer; Director

Executive Director
1,000
48.88
US$100,000
1,000 48.88 US$100,000
2026-06-03 2026-06-03 PrS Proposed sale

Officer

Officer
1,000
48.94
US$100,000
1,000 48.94 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.2%
50.83
US$100,000
1,000 -0.2% 50.83 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.8%
49.28
US$100,000
1,000 -0.8% 49.28 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.9%
48.31
US$100,000
1,000 -0.9% 48.31 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.1%
50.99
US$100,000
1,000 -0.1% 50.99 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.0%
50.29
US$100,000
1,000 -0.0% 50.29 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.4%
49.25
US$100,000
1,000 -0.4% 49.25 US$100,000
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.6%
48.31
US$100,000
1,000 -0.6% 48.31 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -0.2%
52.19
US$100,000
1,000 -0.2% 52.19 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -3.3%
51.47
US$100,000
1,000 -3.3% 51.47 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -3.2%
50.62
US$100,000
1,000 -3.2% 50.62 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
1,000 -1.5%
49.46
US$100,000
1,000 -1.5% 49.46 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -0.2%
52.14
US$100,000
1,000 -0.2% 52.14 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -2.4%
51.46
US$100,000
1,000 -2.4% 51.46 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -2.3%
50.63
US$100,000
1,000 -2.3% 50.63 US$100,000
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
1,000 -1.1%
49.45
US$100,000
1,000 -1.1% 49.45 US$100,000
2026-06-02 2026-06-02 PrS Proposed sale

Officer

Officer
1,000
50.77
US$100,000
1,000 50.77 US$100,000
2026-06-02 2026-06-02 PrS Proposed sale

Officer; Director

Executive Director
1,000
50.78
US$100,000
1,000 50.78 US$100,000
2026-02-26 2026-02-24 S Sale Non-Executive Director
200 -0.3%
34.10
US$6,820
200 -0.3% 34.10 US$6,820
2025-08-08 2025-08-08 PrS Proposed sale

Director

Non-Executive Director
9,703
50.86
US$493,451
9,703 50.86 US$493,451
2025-08-08 2025-08-08 S Sale Non-Executive Director
9,703 -16.6%
50.92
US$494,082
9,703 -16.6% 50.92 US$494,082
2025-08-06 2025-08-04 S Sale

SVP, CFO & Treasurer

Officer
9,843 -100.0%
55.26
US$543,924
9,843 -100.0% 55.26 US$543,924
2025-08-06 2025-08-04 S Sale

SVP, CFO & Treasurer

Officer
15,740 -4.3%
55.13
US$867,734
15,740 -4.3% 55.13 US$867,734
2025-08-06 2025-08-04 S Sale

SVP, CFO & Treasurer

Officer
34,260 -8.5%
54.34
US$1,861,723
34,260 -8.5% 54.34 US$1,861,723
2025-08-06 2025-08-04 S Sale

Chairman, President and CEO

Executive Director
27,743 -2.3%
55.11
US$1,528,820
27,743 -2.3% 55.11 US$1,528,820
2025-08-06 2025-08-04 S Sale

Chairman, President and CEO

Executive Director
73,105 -5.7%
54.26
US$3,966,707
73,105 -5.7% 54.26 US$3,966,707
2025-08-04 2025-08-04 PrS Proposed sale

Officer; Director

Executive Director
100,849
54.49
US$5,495,575
100,849 54.49 US$5,495,575
2025-08-04 2025-08-04 PrS Proposed sale

Officer

Officer
50,000
54.59
US$2,729,455
50,000 54.59 US$2,729,455
2025-06-12 2025-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
300 -0.1%
29.08
US$8,725
300 -0.1% 29.08 US$8,725
2025-06-12 2025-06-11 PlS Planned sale

SVP, CFO & Treasurer

Officer
6,342 -1.5%
28.55
US$181,053
6,342 -1.5% 28.55 US$181,053
2025-06-12 2025-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
500 -0.0%
29.09
US$14,545
500 -0.0% 29.09 US$14,545
2025-06-12 2025-06-11 PlS Planned sale

Chairman, President and CEO

Executive Director
12,315 -0.9%
28.56
US$351,697
12,315 -0.9% 28.56 US$351,697
2025-06-11 2025-06-11 PrS Proposed sale

Officer

Officer
6,642
28.57
US$189,779
6,642 28.57 US$189,779
2025-06-11 2025-06-11 PrS Proposed sale

Officer; Director

Executive Director
12,815
28.58
US$366,241
12,815 28.58 US$366,241
2025-06-09 2025-06-06 PlS Planned sale

SVP, CFO & Treasurer

Officer
4,744 -1.1%
31.83
US$151,012
4,744 -1.1% 31.83 US$151,012
2025-06-09 2025-06-06 PlS Planned sale

Chairman, President and CEO

Executive Director
7,689 -0.6%
31.82
US$244,670
7,689 -0.6% 31.82 US$244,670
2025-06-06 2025-06-06 PrS Proposed sale

Officer; Director

Executive Director
7,689
31.82
US$244,669
7,689 31.82 US$244,669
2025-06-06 2025-06-06 PrS Proposed sale

Officer

Officer
4,744
31.83
US$151,012
4,744 31.83 US$151,012
2025-05-29 2025-05-27 PlS Planned sale

Chairman, President and CEO

Executive Director
98,149 -7.0%
26.60
US$2,610,783
98,149 -7.0% 26.60 US$2,610,783
2025-05-29 2025-05-27 PlS Planned sale

Chairman, President and CEO

Executive Director
24,506 -1.7%
25.55
US$626,052
24,506 -1.7% 25.55 US$626,052
2025-05-29 2025-05-27 PlS Planned sale

SVP, CFO & Treasurer

Officer
39,903 -8.8%
26.61
US$1,061,735
39,903 -8.8% 26.61 US$1,061,735
2025-05-29 2025-05-27 PlS Planned sale

SVP, CFO & Treasurer

Officer
10,097 -2.2%
25.55
US$258,022
10,097 -2.2% 25.55 US$258,022
2025-05-27 2025-05-27 PrS Proposed sale

Officer; Director

Executive Director
122,655
26.39
US$3,236,832
122,655 26.39 US$3,236,832
2025-05-27 2025-05-27 PrS Proposed sale

Officer

Officer
50,000
26.40
US$1,319,755
50,000 26.40 US$1,319,755
2025-05-22 2025-05-20 PlS Planned sale

SVP, CFO & Treasurer

Officer
11,860 -2.5%
24.50
US$290,530
11,860 -2.5% 24.50 US$290,530
2025-05-22 2025-05-20 PlS Planned sale

Chairman, President and CEO

Executive Director
12,815 -0.9%
24.49
US$313,878
12,815 -0.9% 24.49 US$313,878
2025-05-20 2025-05-20 PrS Proposed sale

Officer

Officer
11,860
24.50
US$290,528
11,860 24.50 US$290,528
2025-05-20 2025-05-20 PrS Proposed sale

Officer; Director

Executive Director
12,815
24.49
US$313,877
12,815 24.49 US$313,877