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American Superconductor Corp (AMSC)

Over the last 90 days, American Superconductor Corp. saw a net sale of shares totaling $1.5 million, with no net activity from executives. Recent transactions on June 11, 2026, show multiple proposed and planned sales by officers and directors, including Daniel McGahn and John Kosiba, amounting to significant value. The stock has seen a 25.1% increase in the past 90 days.
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$403,996.16 | Price 41.78 | Shares 9,670
Proposed sale 8 Jun 2026
Value US$403,996.16 | Price 41.78 | Shares 9,670
Proposed sale 8 Jun 2026
Value US$201,966.65 | Price 41.77 | Shares 4,835
Proposed sale 3 Jun 2026
Value US$630,265.28 | Price 48.88 | Shares 12,893
Proposed sale 3 Jun 2026
Value US$315,547.77 | Price 48.94 | Shares 6,447
Planned sale 3 Jun 2026
Value US$30,952.91 | Price 50.83 | Shares 609
Planned sale 3 Jun 2026
Value US$130,012.77 | Price 49.28 | Shares 2,638
Planned sale 3 Jun 2026
Value US$154,582.08 | Price 48.31 | Shares 3,200
Planned sale 3 Jun 2026
Value US$41,658.83 | Price 50.99 | Shares 817
Planned sale 3 Jun 2026
Value US$25,144.00 | Price 50.29 | Shares 500
Planned sale 3 Jun 2026
Value US$221,692.70 | Price 49.25 | Shares 4,501
Planned sale 3 Jun 2026
Value US$341,769.20 | Price 48.31 | Shares 7,075
Planned sale 2 Jun 2026
Value US$31,315.02 | Price 52.19 | Shares 600
Planned sale 2 Jun 2026
Value US$619,444.78 | Price 51.47 | Shares 12,036
Planned sale 2 Jun 2026
Value US$613,601.09 | Price 50.62 | Shares 12,122
Planned sale 2 Jun 2026
Value US$282,125.54 | Price 49.46 | Shares 5,704
Planned sale 2 Jun 2026
Value US$120,173.71 | Price 52.14 | Shares 2,305
Planned sale 2 Jun 2026
Value US$1,469,554.70 | Price 51.46 | Shares 28,558
Planned sale 2 Jun 2026
Value US$1,412,616.06 | Price 50.63 | Shares 27,900
Planned sale 2 Jun 2026
Value US$680,544.66 | Price 49.45 | Shares 13,762
Proposed sale 2 Jun 2026
Value US$1,546,485.68 | Price 50.77 | Shares 30,462
Proposed sale 2 Jun 2026
Value US$3,682,892.03 | Price 50.78 | Shares 72,525
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
9,670
41.78
US$403,996
9,670 41.78 US$403,996
2026-06-08 2026-06-08 PrS Proposed sale

Officer; Director

Executive Director
9,670
41.78
US$403,996
9,670 41.78 US$403,996
2026-06-08 2026-06-08 PrS Proposed sale

Officer

Officer
4,835
41.77
US$201,967
4,835 41.77 US$201,967
2026-06-03 2026-06-03 PrS Proposed sale

Officer; Director

Executive Director
12,893
48.88
US$630,265
12,893 48.88 US$630,265
2026-06-03 2026-06-03 PrS Proposed sale

Officer

Officer
6,447
48.94
US$315,548
6,447 48.94 US$315,548
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
609 -0.2%
50.83
US$30,953
609 -0.2% 50.83 US$30,953
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
2,638 -0.8%
49.28
US$130,013
2,638 -0.8% 49.28 US$130,013
2026-06-03 2026-06-03 PlS Planned sale

SVP, CFO & Treasurer

Officer
3,200 -0.9%
48.31
US$154,582
3,200 -0.9% 48.31 US$154,582
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
817 -0.1%
50.99
US$41,659
817 -0.1% 50.99 US$41,659
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
500 -0.0%
50.29
US$25,144
500 -0.0% 50.29 US$25,144
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
4,501 -0.4%
49.25
US$221,693
4,501 -0.4% 49.25 US$221,693
2026-06-03 2026-06-03 PlS Planned sale

Chairman, President and CEO

Executive Director
7,075 -0.6%
48.31
US$341,769
7,075 -0.6% 48.31 US$341,769
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
600 -0.2%
52.19
US$31,315
600 -0.2% 52.19 US$31,315
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
12,036 -3.3%
51.47
US$619,445
12,036 -3.3% 51.47 US$619,445
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
12,122 -3.2%
50.62
US$613,601
12,122 -3.2% 50.62 US$613,601
2026-06-03 2026-06-02 PlS Planned sale

SVP, CFO & Treasurer

Officer
5,704 -1.5%
49.46
US$282,126
5,704 -1.5% 49.46 US$282,126
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
2,305 -0.2%
52.14
US$120,174
2,305 -0.2% 52.14 US$120,174
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
28,558 -2.4%
51.46
US$1,469,555
28,558 -2.4% 51.46 US$1,469,555
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
27,900 -2.3%
50.63
US$1,412,616
27,900 -2.3% 50.63 US$1,412,616
2026-06-03 2026-06-02 PlS Planned sale

Chairman, President and CEO

Executive Director
13,762 -1.1%
49.45
US$680,545
13,762 -1.1% 49.45 US$680,545
2026-06-02 2026-06-02 PrS Proposed sale

Officer

Officer
30,462
50.77
US$1,546,486
30,462 50.77 US$1,546,486
2026-06-02 2026-06-02 PrS Proposed sale

Officer; Director

Executive Director
72,525
50.78
US$3,682,892
72,525 50.78 US$3,682,892
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