United States Machinery, Equipment & Components

American Superconductor Corp (AMSC)

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Over the past 90 days, American Superconductor Corp insiders have engaged in 45 transactions, all of which were sales. Key executives, including the CEO and CFO, executed multiple planned and proposed sales on June 11, 2026. These transactions follow the company's May 2026 earnings report, during which the firm reported an EPS beat.
Ticker: AMSC Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Sale 11 Jun 2026
Value US$4,352,207.17 | Price 139.51 | Shares 54,443 (-9.6%)
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
Dambier Laura A.
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
3.2
McGahn Daniel P

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
1,743 -0.5%
37.85
US$65,975 		1,743 -0.5% 37.85 US$65,975
2026-06-11 2026-06-11 PrS Proposed sale
3.2
DANIEL MCGAHN

Officer; Director

Executive Director
16,117
37.45
US$603,503 		16,117 37.45 US$603,503
2026-06-11 2026-06-11 PrS Proposed sale
3.2
DANIEL MCGAHN

Officer; Director

Executive Director
16,117
37.45
US$603,503 		16,117 37.45 US$603,503
2026-06-11 2026-06-11 PrS Proposed sale
3.1
JOHN KOSIBA

Officer

Officer
6,769
37.46
US$253,579 		6,769 37.46 US$253,579
2026-06-11 2026-06-11 PrS Proposed sale
3.1
JOHN KOSIBA

Officer

Officer
6,769
37.46
US$253,579 		6,769 37.46 US$253,579
2026-06-11 2026-06-11 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
4,609 -0.4%
37.85
US$174,456 		4,609 -0.4% 37.85 US$174,456
2026-06-11 2026-06-11 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
4,609 -0.4%
37.85
US$174,456 		4,609 -0.4% 37.85 US$174,456
2026-06-11 2026-06-11 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
11,508 -1.0%
37.28
US$429,047 		11,508 -1.0% 37.28 US$429,047
2026-06-11 2026-06-11 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
11,508 -1.0%
37.28
US$429,047 		11,508 -1.0% 37.28 US$429,047
2026-06-11 2026-06-11 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
1,743 -0.5%
37.85
US$65,975 		1,743 -0.5% 37.85 US$65,975
2026-06-11 2026-06-11 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
1,743 -0.5%
37.85
US$65,975 		1,743 -0.5% 37.85 US$65,975
2026-06-11 2026-06-11 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
5,026 -1.5%
37.33
US$187,604 		5,026 -1.5% 37.33 US$187,604
2026-06-11 2026-06-11 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
5,026 -1.5%
37.33
US$187,604 		5,026 -1.5% 37.33 US$187,604
2026-06-10 2026-06-10 PrS Proposed sale
Dambier Laura A.

Director

Non-Executive Director
4,000
40.21
US$160,854 		4,000 40.21 US$160,854
2026-06-10 2026-06-08 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
4,678 -0.4%
42.19
US$197,381 		4,678 -0.4% 42.19 US$197,381
2026-06-10 2026-06-08 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
1,549 -0.5%
42.35
US$65,596 		1,549 -0.5% 42.35 US$65,596
2026-06-10 2026-06-08 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
1,549 -0.5%
42.35
US$65,596 		1,549 -0.5% 42.35 US$65,596
2026-06-10 2026-06-08 PlS Planned sale
3.1
Kosiba John W JR

SVP, CFO & Treasurer

Officer
3,286 -0.9%
41.50
US$136,371 		3,286 -0.9% 41.50 US$136,371
2026-06-10 2026-06-08 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
4,678 -0.4%
42.19
US$197,381 		4,678 -0.4% 42.19 US$197,381
2026-06-10 2026-06-08 PlS Planned sale
3.2
McGahn Daniel P

Chairman, President and CEO

Executive Director
4,992 -0.4%
41.39
US$206,614 		4,992 -0.4% 41.39 US$206,614
2026-06-08 2026-06-08 PrS Proposed sale
3.2
DANIEL MCGAHN

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
3.2
DANIEL MCGAHN

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
3.1
JOHN KOSIBA

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
3.2
DANIEL MCGAHN

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
3.1
JOHN KOSIBA

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.1
JOHN KOSIBA

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
3.2
DANIEL MCGAHN

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
2.6
OLIVER DAVID R JR
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
3.0
Arthur H House

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
3.0
House Arthur H
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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.2
DANIEL MCGAHN

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
3.1
JOHN KOSIBA

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.1
JOHN KOSIBA JR.

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
3.2
DANIEL MCGAHN

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.2
DANIEL MCGAHN

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
3.1
JOHN KOSIBA JR.

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
3.2
McGahn Daniel P

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
3.2
McGahn Daniel P

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
3.1
Kosiba John W JR

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
3.1
Kosiba John W JR

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
3.2
DANIEL MCGAHN

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
3.1
JOHN KOSIBA JR.

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
3.1
Kosiba John W JR

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
3.2
McGahn Daniel P

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
3.1
JOHN KOSIBA JR.

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
3.2
DANIEL MCGAHN

Officer; Director

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