AMSC

American Superconductor Corp /de/

Insider trading activity for American Superconductor Corp /de/, straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

net buying

Bought(0 · 0 insiders): $0
Sold(0 · 0 insiders): $0

Past 6 months

-$7.8M

net selling

Bought(0 · 0 insiders): $0
Sold(24 · 3 insiders): $7.8M

Past 12 months

-$7.8M

net selling

Bought(0 · 0 insiders): $0
Sold(25 · 4 insiders): $7.8M

Transaction history

The 59 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Sep 18	Littlefield Barbara G.	Director	AGRANT	1,607	—	—	+4.5%	Open the original filing on SEC.gov
Jun 11	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	1,743	$37.85	$66K	-0.5%	Open the original filing on SEC.gov
Jun 11	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	5,026	$37.33	$187.6K	-1.5%	Open the original filing on SEC.gov
Jun 11	McGahn Daniel P	Chairman, President and…	SSELL◷	4,609	$37.85	$174.5K	-0.4%	Open the original filing on SEC.gov
Jun 11	McGahn Daniel P	Chairman, President and…	SSELL◷	11,508	$37.28	$429K	-1.0%	Open the original filing on SEC.gov
Jun 11	Dambier Laura A.	Director	SSELL	4,000	$37.63	$150.5K	-21.1%	Open the original filing on SEC.gov
Jun 8	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	1,549	$42.35	$65.6K	-0.4%	Open the original filing on SEC.gov
Jun 8	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	3,286	$41.50	$136.4K	-0.9%	Open the original filing on SEC.gov
Jun 8	McGahn Daniel P	Chairman, President and…	SSELL◷	4,678	$42.19	$197.4K	-0.4%	Open the original filing on SEC.gov
Jun 8	McGahn Daniel P	Chairman, President and…	SSELL◷	4,992	$41.39	$206.6K	-0.4%	Open the original filing on SEC.gov
Jun 3	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	609	$50.83	$31K	-0.2%	Open the original filing on SEC.gov
Jun 3	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	2,638	$49.28	$130K	-0.8%	Open the original filing on SEC.gov
Jun 3	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	3,200	$48.31	$154.6K	-0.9%	Open the original filing on SEC.gov
Jun 3	McGahn Daniel P	Chairman, President and…	SSELL◷	817	$50.99	$41.7K	<0.1%	Open the original filing on SEC.gov
Jun 3	McGahn Daniel P	Chairman, President and…	SSELL◷	500	$50.29	$25.1K	<0.1%	Open the original filing on SEC.gov
Jun 3	McGahn Daniel P	Chairman, President and…	SSELL◷	4,501	$49.25	$221.7K	-0.4%	Open the original filing on SEC.gov
Jun 3	McGahn Daniel P	Chairman, President and…	SSELL◷	7,075	$48.31	$341.8K	-0.6%	Open the original filing on SEC.gov
Jun 2	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	600	$52.19	$31.3K	-0.2%	Open the original filing on SEC.gov
Jun 2	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	12,036	$51.47	$619.4K	-3.3%	Open the original filing on SEC.gov
Jun 2	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	12,122	$50.62	$613.6K	-3.2%	Open the original filing on SEC.gov
Jun 2	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	5,704	$49.46	$282.1K	-1.5%	Open the original filing on SEC.gov
Jun 2	McGahn Daniel P	Chairman, President and…	SSELL◷	2,305	$52.14	$120.2K	-0.2%	Open the original filing on SEC.gov
Jun 2	McGahn Daniel P	Chairman, President and…	SSELL◷	28,558	$51.46	$1.5M	-2.4%	Open the original filing on SEC.gov
Jun 2	McGahn Daniel P	Chairman, President and…	SSELL◷	27,900	$50.63	$1.4M	-2.3%	Open the original filing on SEC.gov
Jun 2	McGahn Daniel P	Chairman, President and…	SSELL◷	13,762	$49.45	$680.5K	-1.1%	Open the original filing on SEC.gov
Jun 1	Kosiba John W JR	SVP, CFO & Treasurer	AGRANT◷	30,000	—	—	+8.5%	Open the original filing on SEC.gov
Jun 1	McGahn Daniel P	Chairman, President and…	AGRANT◷	60,000	—	—	+5.1%	Open the original filing on SEC.gov
Apr 3	Donnelly Terence Robert	Director	AGRANT	2,665	—	—	—	Open the original filing on SEC.gov
Apr 3	Oliver David R Jr	Director	AGRANT	3,116	—	—	+5.1%	Open the original filing on SEC.gov
Apr 3	Littlefield Barbara G.	Director	AGRANT	3,116	—	—	+9.6%	Open the original filing on SEC.gov
Apr 3	Klein Margaret D.	Director	AGRANT	3,116	—	—	+19.0%	Open the original filing on SEC.gov
Apr 3	House Arthur H	Director	AGRANT	3,116	—	—	+6.4%	Open the original filing on SEC.gov
Apr 3	Dambier Laura A.	Director	AGRANT	3,116	—	—	+19.6%	Open the original filing on SEC.gov
Feb 24	Oliver David R Jr	Director	SSELL	200	$34.10	$6.8K	-0.3%	Open the original filing on SEC.gov
Aug 8, 2025	House Arthur H	Director	SSELL	9,703	$50.92	$494.1K	-16.6%	Open the original filing on SEC.gov
Aug 6, 2025	House Arthur H	Director	MEXER◆	9,703	—	—	—	Open the original filing on SEC.gov
Aug 6, 2025	House Arthur H	Director	MEXER	9,703	$6.80	$66K	+19.9%	Open the original filing on SEC.gov
Aug 4, 2025	McGahn Daniel P	Chairman, President and…	SSELL	27,743	$55.11	$1.5M	-2.3%	Open the original filing on SEC.gov
Aug 4, 2025	McGahn Daniel P	Chairman, President and…	SSELL	73,105	$54.26	$4M	-5.7%	Open the original filing on SEC.gov
Aug 4, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL	9,843	$55.26	$543.9K	-100.0%	Open the original filing on SEC.gov
Aug 4, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL	15,740	$55.13	$867.7K	-4.3%	Open the original filing on SEC.gov
Aug 4, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL	34,260	$54.34	$1.9M	-8.5%	Open the original filing on SEC.gov
Jun 11, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	500	$29.09	$14.5K	<0.1%	Open the original filing on SEC.gov
Jun 11, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	12,315	$28.56	$351.7K	-0.9%	Open the original filing on SEC.gov
Jun 11, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	300	$29.08	$8.7K	<0.1%	Open the original filing on SEC.gov
Jun 11, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	6,342	$28.55	$181.1K	-1.6%	Open the original filing on SEC.gov
Jun 6, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	4,744	$31.83	$151K	-1.1%	Open the original filing on SEC.gov
Jun 6, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	7,689	$31.82	$244.7K	-0.6%	Open the original filing on SEC.gov
May 27, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	98,149	$26.60	$2.6M	-7.0%	Open the original filing on SEC.gov
May 27, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	24,506	$25.55	$626.1K	-1.7%	Open the original filing on SEC.gov
May 27, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	39,903	$26.61	$1.1M	-8.8%	Open the original filing on SEC.gov
May 27, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	10,097	$25.55	$258K	-2.2%	Open the original filing on SEC.gov
May 27, 2025	Donnelly Terence Robert	Director	AGRANT◆	2,112	—	—	—	Open the original filing on SEC.gov
May 20, 2025	Kosiba John W JR	SVP, CFO & Treasurer	SSELL◷	11,860	$24.50	$290.5K	-2.5%	Open the original filing on SEC.gov
May 20, 2025	McGahn Daniel P	Chairman, President and…	SSELL◷	12,815	$24.49	$313.9K	-0.9%	Open the original filing on SEC.gov
May 15, 2025	Kosiba John W JR	SVP, CFO & Treasurer	AGRANT	120,000	—	—	+33.7%	Open the original filing on SEC.gov
May 15, 2025	McGahn Daniel P	Chairman, President and…	AGRANT	240,000	—	—	+20.0%	Open the original filing on SEC.gov
Aug 4, 2022	Klein Margaret D.	Director	PBUY★	500	$5.57	$2.8K	+3.1%	Open the original filing on SEC.gov
Jun 18, 2019	Oliver David R Jr	Director	PBUY	200	$8.33	$1.7K	+0.3%	Open the original filing on SEC.gov

AGRANT—

Littlefield Barbara G. · DirectorSep 18

1,607 sh · +4.5% own

SSELL◷$66K

Kosiba John W JR · SVP, CFO & Treasur…Jun 11

1,743 sh @ $37.85 · -0.5% own

SSELL◷$187.6K

Kosiba John W JR · SVP, CFO & Treasur…Jun 11

5,026 sh @ $37.33 · -1.5% own

SSELL◷$174.5K

McGahn Daniel P · Chairman, Presiden…Jun 11

4,609 sh @ $37.85 · -0.4% own

SSELL◷$429K

McGahn Daniel P · Chairman, Presiden…Jun 11

11,508 sh @ $37.28 · -1.0% own

SSELL$150.5K

Dambier Laura A. · DirectorJun 11

4,000 sh @ $37.63 · -21.1% own

SSELL◷$65.6K

Kosiba John W JR · SVP, CFO & Treasur…Jun 8

1,549 sh @ $42.35 · -0.4% own

SSELL◷$136.4K

Kosiba John W JR · SVP, CFO & Treasur…Jun 8

3,286 sh @ $41.50 · -0.9% own

SSELL◷$197.4K

McGahn Daniel P · Chairman, Presiden…Jun 8

4,678 sh @ $42.19 · -0.4% own

SSELL◷$206.6K

McGahn Daniel P · Chairman, Presiden…Jun 8

4,992 sh @ $41.39 · -0.4% own

SSELL◷$31K

Kosiba John W JR · SVP, CFO & Treasur…Jun 3

609 sh @ $50.83 · -0.2% own

SSELL◷$130K

Kosiba John W JR · SVP, CFO & Treasur…Jun 3

2,638 sh @ $49.28 · -0.8% own

SSELL◷$154.6K

Kosiba John W JR · SVP, CFO & Treasur…Jun 3

3,200 sh @ $48.31 · -0.9% own

SSELL◷$41.7K

McGahn Daniel P · Chairman, Presiden…Jun 3

817 sh @ $50.99 · <0.1% own

SSELL◷$25.1K

McGahn Daniel P · Chairman, Presiden…Jun 3

500 sh @ $50.29 · <0.1% own

SSELL◷$221.7K

McGahn Daniel P · Chairman, Presiden…Jun 3

4,501 sh @ $49.25 · -0.4% own

SSELL◷$341.8K

McGahn Daniel P · Chairman, Presiden…Jun 3

7,075 sh @ $48.31 · -0.6% own

SSELL◷$31.3K

Kosiba John W JR · SVP, CFO & Treasur…Jun 2

600 sh @ $52.19 · -0.2% own

SSELL◷$619.4K

Kosiba John W JR · SVP, CFO & Treasur…Jun 2

12,036 sh @ $51.47 · -3.3% own

SSELL◷$613.6K

Kosiba John W JR · SVP, CFO & Treasur…Jun 2

12,122 sh @ $50.62 · -3.2% own

SSELL◷$282.1K

Kosiba John W JR · SVP, CFO & Treasur…Jun 2

5,704 sh @ $49.46 · -1.5% own

SSELL◷$120.2K

McGahn Daniel P · Chairman, Presiden…Jun 2

2,305 sh @ $52.14 · -0.2% own

SSELL◷$1.5M

McGahn Daniel P · Chairman, Presiden…Jun 2

28,558 sh @ $51.46 · -2.4% own

SSELL◷$1.4M

McGahn Daniel P · Chairman, Presiden…Jun 2

27,900 sh @ $50.63 · -2.3% own

SSELL◷$680.5K

McGahn Daniel P · Chairman, Presiden…Jun 2

13,762 sh @ $49.45 · -1.1% own

AGRANT◷—

Kosiba John W JR · SVP, CFO & Treasur…Jun 1

30,000 sh · +8.5% own

AGRANT◷—

McGahn Daniel P · Chairman, Presiden…Jun 1

60,000 sh · +5.1% own

AGRANT—

Donnelly Terence Robert · DirectorApr 3

2,665 sh

AGRANT—

Oliver David R Jr · DirectorApr 3

3,116 sh · +5.1% own

AGRANT—

Littlefield Barbara G. · DirectorApr 3

3,116 sh · +9.6% own

AGRANT—

Klein Margaret D. · DirectorApr 3

3,116 sh · +19.0% own

AGRANT—

House Arthur H · DirectorApr 3

3,116 sh · +6.4% own

AGRANT—

Dambier Laura A. · DirectorApr 3

3,116 sh · +19.6% own

SSELL$6.8K

Oliver David R Jr · DirectorFeb 24

200 sh @ $34.10 · -0.3% own

SSELL$494.1K

House Arthur H · DirectorAug 8, 2025

9,703 sh @ $50.92 · -16.6% own

MEXER◆—

House Arthur H · DirectorAug 6, 2025

9,703 sh

MEXER$66K

House Arthur H · DirectorAug 6, 2025

9,703 sh @ $6.80 · +19.9% own

SSELL$1.5M

McGahn Daniel P · Chairman, Presiden…Aug 4, 2025

27,743 sh @ $55.11 · -2.3% own

SSELL$4M

McGahn Daniel P · Chairman, Presiden…Aug 4, 2025

73,105 sh @ $54.26 · -5.7% own

SSELL$543.9K

Kosiba John W JR · SVP, CFO & Treasur…Aug 4, 2025

9,843 sh @ $55.26 · -100.0% own

SSELL$867.7K

Kosiba John W JR · SVP, CFO & Treasur…Aug 4, 2025

15,740 sh @ $55.13 · -4.3% own

SSELL$1.9M

Kosiba John W JR · SVP, CFO & Treasur…Aug 4, 2025

34,260 sh @ $54.34 · -8.5% own

SSELL◷$14.5K

McGahn Daniel P · Chairman, Presiden…Jun 11, 2025

500 sh @ $29.09 · <0.1% own

SSELL◷$351.7K

McGahn Daniel P · Chairman, Presiden…Jun 11, 2025

12,315 sh @ $28.56 · -0.9% own

SSELL◷$8.7K

Kosiba John W JR · SVP, CFO & Treasur…Jun 11, 2025

300 sh @ $29.08 · <0.1% own

SSELL◷$181.1K

Kosiba John W JR · SVP, CFO & Treasur…Jun 11, 2025

6,342 sh @ $28.55 · -1.6% own

SSELL◷$151K

Kosiba John W JR · SVP, CFO & Treasur…Jun 6, 2025

4,744 sh @ $31.83 · -1.1% own

SSELL◷$244.7K

McGahn Daniel P · Chairman, Presiden…Jun 6, 2025

7,689 sh @ $31.82 · -0.6% own

SSELL◷$2.6M

McGahn Daniel P · Chairman, Presiden…May 27, 2025

98,149 sh @ $26.60 · -7.0% own

SSELL◷$626.1K

McGahn Daniel P · Chairman, Presiden…May 27, 2025

24,506 sh @ $25.55 · -1.7% own

SSELL◷$1.1M

Kosiba John W JR · SVP, CFO & Treasur…May 27, 2025

39,903 sh @ $26.61 · -8.8% own

SSELL◷$258K

Kosiba John W JR · SVP, CFO & Treasur…May 27, 2025

10,097 sh @ $25.55 · -2.2% own

AGRANT◆—

Donnelly Terence Robert · DirectorMay 27, 2025

2,112 sh

SSELL◷$290.5K

Kosiba John W JR · SVP, CFO & Treasur…May 20, 2025

11,860 sh @ $24.50 · -2.5% own

SSELL◷$313.9K

McGahn Daniel P · Chairman, Presiden…May 20, 2025

12,815 sh @ $24.49 · -0.9% own

AGRANT—

Kosiba John W JR · SVP, CFO & Treasur…May 15, 2025

120,000 sh · +33.7% own

AGRANT—

McGahn Daniel P · Chairman, Presiden…May 15, 2025

240,000 sh · +20.0% own

PBUY★$2.8K

Klein Margaret D. · DirectorAug 4, 2022

500 sh @ $5.57 · +3.1% own

PBUY$1.7K

Oliver David R Jr · DirectorJun 18, 2019

200 sh @ $8.33 · +0.3% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

2 of 29 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 1,599 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Jun 18, 2019	Nov 12, 2025	Oliver David R JrDirector	1,599days · about 6.3 years	$1.7K	Filing ↗
Aug 4, 2022	Aug 5, 2025	Klein Margaret D.Director	747days · about 3 years	$2.8K	Filing ↗

Oliver David R JrDirector

1,599days · about 6.3 years

Traded Jun 18, 2019 · filed Nov 12, 2025Filing ↗

Klein Margaret D.Director

747days · about 3 years

Traded Aug 4, 2022 · filed Aug 5, 2025Filing ↗

Counted in business days from the transaction date, or the deemed execution date where the filing reports one, excluding weekends and federal holidays. How this is measured · All late filings

Insiders at this company

Everyone who has filed a Form 4 for this issuer.

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