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person · Reporting owner

Kosiba John W JR

Disclosed activity across 1 company

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39444
SEC CIK
0001703463

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Reported relationships

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CompanyLast reported asReport datePublished
AMERICAN SUPERCONDUCTOR CORP /DE/AMSC · Entity 4752SVP, CFO & TreasurerJune 11, 2026June 11, 2026

Disclosed balances

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Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

AMERICAN SUPERCONDUCTOR CORP /DE/

Report date June 11, 2026 · Filed June 11, 2026

Security / awardOwnership accountDisclosed shares / unitsDisclosure context
Common StockSEC Table I · non-derivativeDirect336,120 Reported balance After 2026-06-11 transaction · row 1 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 1 · 2026-06-11 · Sale · Disposed 5,026 · Balance 336,120

F1: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F2: The sales were executed in multiple trades at prices ranging from $36.775-$37.73. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Common StockSEC Table I · non-derivativeDirect334,377 Reported balance After 2026-06-11 transaction · row 2 Account or security details depend on footnotes; rows are not merged.
1 source row

Row 2 · 2026-06-11 · Sale · Disposed 1,743 · Balance 334,377

F1: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F3: The sales were executed in multiple trades at prices ranging from $37.82-$38.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4: Following all the transactions reported on this Form 4, the reporting person holds 334,377 shares directly.

Common StockSEC Table I · non-derivativeIndirectBy 401(k) plan371 Reported balance Holding disclosure · report date 2026-06-11 · row 3 Holding and transaction disclosures are not merged.
1 source row

Row 3 · Balance 371

F5: Following all the transactions reported on this Form 4, the reporting person holds 371 shares indirectly through the company's 401(k) plan as of June 11, 2026.

Filing footnotes · ownership attribution and instrument terms

F1: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F2: The sales were executed in multiple trades at prices ranging from $36.775-$37.73. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F3: The sales were executed in multiple trades at prices ranging from $37.82-$38.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4: Following all the transactions reported on this Form 4, the reporting person holds 334,377 shares directly.

F5: Following all the transactions reported on this Form 4, the reporting person holds 371 shares indirectly through the company's 401(k) plan as of June 11, 2026.

Transaction history

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Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction dateCompanyActivity / securityShares / unitsReported priceReported valueDetails
June 11, 2026 Filed Jun 11, 2026 20:31 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 1,743 $37.85 $65,975.34
Disclosure

SEC source: 0001193125-26-267677 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 334,377

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F3 · price: The sales were executed in multiple trades at prices ranging from $37.82-$38.06. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 334,377 shares directly.

Read SEC document
June 11, 2026 Filed Jun 11, 2026 20:31 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 5,026 $37.33 $187,603.99
Disclosure

SEC source: 0001193125-26-267677 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 336,120

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F2 · price: The sales were executed in multiple trades at prices ranging from $36.775-$37.73. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 20:55 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 1,549 $42.35 $65,595.50
Disclosure

SEC source: 0001193125-26-265996 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 341,146

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F3 · price: The sales were executed in multiple trades at prices ranging from $41.94-$42.86. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 341,146 shares directly.

Read SEC document
June 08, 2026 Filed Jun 10, 2026 20:55 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 3,286 $41.50 $136,371.30
Disclosure

SEC source: 0001193125-26-265996 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 342,695

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F2 · price: The sales were executed in multiple trades at prices ranging from $40.94-$41.90. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 03, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 609 $50.83 $30,952.91
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 8

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 345,981

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F9 · price: The sales were executed in multiple trades at prices ranging from $50.35-$50.99. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F10 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 345,981 shares directly.

Read SEC document
June 03, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 2,638 $49.28 $130,012.77
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 7

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 346,590

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F8 · price: The sales were executed in multiple trades at prices ranging from $48.87-$49.62. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 03, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 3,200 $48.31 $154,582.08
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 6

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 349,228

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F7 · price: The sales were executed in multiple trades at prices ranging from $47.80-$48.76. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 02, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 600 $52.19 $31,315.02
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 5

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 352,428

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F6 · price: The sales were executed in multiple trades at prices ranging from $52.00-$52.37. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

Read SEC document
June 02, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 12,036 $51.47 $619,444.78
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 4

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 353,028

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F5 · price: The sales were executed in multiple trades at prices ranging from $50.99-$51.90. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

Read SEC document
June 02, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 12,122 $50.62 $613,601.09
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 3

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 365,064

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F4 · price: The sales were executed in multiple trades at prices ranging from $49.99-$50.95. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

Read SEC document
June 02, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 5,704 $49.46 $282,125.54
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 377,186

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on August 15, 2025.

F3 · price: The sales were executed in multiple trades at prices ranging from $48.95-$49.87. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

Read SEC document
June 01, 2026 Filed Jun 3, 2026 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 30,000 $0.00 $0.00
Disclosure

SEC source: 0001193125-26-255471 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 382,890

F1 · shares: The restricted stock award was granted on June 1, 2026. The award will vest in three equal annual installments beginning June 10, 2027.

Read SEC document
August 04, 2025 Filed Aug 6, 2025 20:29 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 9,843 $55.26 $543,924.18
Disclosure

SEC source: 0000950170-25-104131 · ownership.xml · nonDerivative · entry 3

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Indirect · By 401(k) plan

Disclosed balance after: 0

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 0 shares indirectly through the issuer's 401(k) plan as of August 6, 2025.

Read SEC document
August 04, 2025 Filed Aug 6, 2025 20:29 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 15,740 $55.13 $867,733.61
Disclosure

SEC source: 0000950170-25-104131 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 352,890

F2 · price: The sales were executed in multiple trades at prices ranging from $55.00-$55.34. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 352,890 shares directly.

Read SEC document
August 04, 2025 Filed Aug 6, 2025 20:29 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 34,260 $54.34 $1,861,722.66
Disclosure

SEC source: 0000950170-25-104131 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 368,630

F1 · price: The sales were executed in multiple trades at prices ranging from $54.00-$54.94. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 11, 2025 Filed Jun 12, 2025 20:19 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 300 $29.08 $8,724.99
Disclosure

SEC source: 0000950170-25-085408 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 402,890

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards.

F4 · price: The sales were executed in multiple trades at prices ranging from $29.08-$29.09. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F5 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 402,890 shares directly.

Read SEC document
June 11, 2025 Filed Jun 12, 2025 20:19 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 6,342 $28.55 $181,053.32
Disclosure

SEC source: 0000950170-25-085408 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 403,190

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards.

F3 · price: The sales were executed in multiple trades at prices ranging from $28.06-$28.83. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
June 06, 2025 Filed Jun 9, 2025 20:57 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 4,744 $31.83 $151,012.43
Disclosure

SEC source: 0000950170-25-083826 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 409,532

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards.

F3 · price: The sales were executed in multiple trades at prices ranging from $31.44-$32.23. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 409,532 shares directly.

Read SEC document
May 27, 2025 Filed May 29, 2025 21:22 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 39,903 $26.61 $1,061,735.03
Disclosure

SEC source: 0000950170-25-079157 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 414,276

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F3 · price: The sales were executed in multiple trades at prices ranging from $26.25-$27.10. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 414,276 shares directly.

Read SEC document
May 27, 2025 Filed May 29, 2025 21:22 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 10,097 $25.55 $258,021.77
Disclosure

SEC source: 0000950170-25-079157 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 454,179

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F2 · price: The sales were executed in multiple trades at prices ranging from $25.10-$26.00. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

Read SEC document
May 20, 2025 Filed May 22, 2025 20:47 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 11,860 $24.50 $290,529.68
Disclosure

SEC source: 0000950170-25-076416 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 464,276

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 11, 2024.

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards.

F3 · price: The sales were executed in multiple trades at prices ranging from $24.13-$24.89. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and prices at which the transactions were effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 464,276 shares directly.

Read SEC document
May 15, 2025 Filed May 19, 2025 20:43 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 120,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-25-074461 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 476,136

F1 · shares: The restricted stock award was granted on May 15, 2025. The award will vest as follows: (a) 40,000 shares will vest in three equal annual installments beginning June 2, 2026, and (b) 80,000 shares will vest upon the achievement of specified performance objectives.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 476,136 shares directly.

Read SEC document
November 04, 2024 Filed Nov 6, 2024 21:38 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 50,000 $28.28 $1,414,095.00
Disclosure

SEC source: 0000950170-24-122413 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 356,136

F1 · price: The sales were executed in multiple trades at prices ranging from $28.00-$28.50. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 356,136 shares directly.

Read SEC document
September 26, 2024 Filed Sep 30, 2024 21:12 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 90,000 $0.00 $0.00
Disclosure

SEC source: 0000950170-24-110427 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 406,136

F1 · shares: The restricted stock award was granted on September 26, 2024. The award will vest as follows: (a) 30,000 shares will vest in three equal annual installments beginning June 5, 2025, and (b) 60,000 shares will vest upon the achievement of specified performance objectives.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 406,136 shares directly.

Read SEC document
June 11, 2024 Filed Jun 12, 2024 13:08 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 32,000 $21.68 $693,750.40
Disclosure

SEC source: 0000950170-24-072272 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 316,136

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 6, 2023.

F2 · price: The sales were executed in multiple trades at prices ranging from $21.26-$22.03. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 316,136 shares directly.

Read SEC document
May 21, 2024 Filed May 23, 2024 20:33 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 2,170 $15.30 $33,199.05
Disclosure

SEC source: 0000950170-24-063992 · ownership.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 348,136

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 6, 2023.

F3 · price: The sales were executed in multiple trades at prices ranging from $15.24-$15.405. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 348,136 shares directly.

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May 21, 2024 Filed May 23, 2024 20:33 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 26,830 $14.78 $396,614.48
Disclosure

SEC source: 0000950170-24-063992 · ownership.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 350,306

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 6, 2023.

F2 · price: The sales were executed in multiple trades at prices ranging from $14.24-$15.2375. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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June 22, 2023 Filed Jun 23, 2023 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 29,878 $5.95 $177,815.93
Disclosure

SEC source: 0001209191-23-039350 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 377,136

F3 · kind: The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on March 17, 2023.

F4 · price: The sales were executed in multiple trades at prices ranging from $5.75-$6.09. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F5 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 377,136 shares directly.

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June 21, 2023 Filed Jun 23, 2023 20:15 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 50,132 $6.15 $308,532.38
Disclosure

SEC source: 0001209191-23-039350 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 407,014

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The reported transaction was effected pursuant to a Rule 10b5-1 trading plan previously entered into by the reporting person on March 17, 2023.

F2 · price: The sales were executed in multiple trades at prices ranging from $6.07-$6.24. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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June 15, 2023 Filed Jun 20, 2023 20:26 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 Disposition to issuerCommon Stock 1,613 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-038394 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 457,146

F2 · shares: Represents 1,613 shares out of a total of 50,000 shares of restricted stock that were awarded on May 21, 2020 and would vest upon American Superconductor Corporation's (the "Company") achievement of specified performance objectives. On June 15, 2023, the Board of Directors of the Company certified that maximum-level performance was achieved with respect to the cumulative organic Grid revenues performance objective and between target-level and maximum-level performance was achieved with respect to the cumulative organic total revenues performance objective. As a result, these shares have been forfeited to the Company.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 457,146 shares directly.

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June 15, 2023 Filed Jun 20, 2023 20:26 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 105,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-23-038394 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 458,759

F1 · shares: The restricted stock award was granted on June 15, 2023. The award will vest as follows: (a) 42,000 shares will vest in three equal annual installments beginning June 10, 2024, and (b) 63,000 shares will vest upon the achievement of specified performance objectives.

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December 16, 2022 Filed Dec 19, 2022 21:18 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 PurchaseCommon Stock 15,000 $3.50 $52,471.50
Disclosure

SEC source: 0001209191-22-061893 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 353,759

F1 · price: The purchases were executed in multiple trades at prices ranging from $3.48-$3.50. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 353,759 shares directly.

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December 12, 2022 Filed Dec 13, 2022 21:17 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 PurchaseCommon Stock 25,000 $3.34 $83,400.00
Disclosure

SEC source: 0001209191-22-060921 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 338,759

F1 · price: The purchases were executed in multiple trades at prices ranging from $3.2599-$3.35. The price reported above reflects the weighted average purchase price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 338,759 shares directly.

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October 19, 2022 Filed Oct 21, 2022 20:28 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 125,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-22-054266 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 313,759

F1 · shares: The restricted stock award was granted on October 19, 2022. The award will vest as follows: (a) 25,000 shares will vest on May 19, 2023, 25,000 shares will vest on May 19, 2024, and 25,000 shares will vest on May 19, 2025, and (b) 50,000 shares will vest upon the achievement of specified performance objectives.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 313,759 shares directly.

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June 10, 2022 Filed Jun 13, 2022 20:43 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 8,473 $5.97 $50,621.94
Disclosure

SEC source: 0001209191-22-036351 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 188,759

F1 · kind: The reporting person received an award of 19,500 shares of restricted stock on October 31, 2019 that would vest upon American Superconductor Corporation's (the "Company") achievement of specified performance objectives. On June 9, 2022, the Board of Directors of the Company certified that maximum-level performance was achieved with respect to all such performance objectives. As a result, these shares have been fully vested. Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $5.90-$6.18. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 188,759 shares directly.

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May 31, 2022 Filed Jun 2, 2022 21:36 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 13,325 $5.45 $72,677.22
Disclosure

SEC source: 0001209191-22-033662 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 197,232

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of restricted stock awards. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $5.33-$5.62. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 197,232 shares directly.

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December 10, 2021 Filed Dec 13, 2021 21:53 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 22,754 $11.31 $257,406.90
Disclosure

SEC source: 0001209191-21-069270 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 210,557

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $11.22-$11.70. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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November 02, 2021 Filed Nov 2, 2021 20:26 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 259 $19.31 $5,001.29
Disclosure

SEC source: 0001209191-21-062400 · doc4.xml · nonDerivative · entry 3

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 233,311

F3 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award on November 1, 2021. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

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November 02, 2021 Filed Nov 2, 2021 20:26 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 6,983 $18.77 $131,077.19
Disclosure

SEC source: 0001209191-21-062400 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 233,570

F3 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award on November 1, 2021. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F4 · price: The sales were executed in multiple trades at prices ranging from $18.31-$19.19. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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November 01, 2021 Filed Nov 2, 2021 20:26 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 3,766 $18.95 $71,383.40
Disclosure

SEC source: 0001209191-21-062400 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 240,553

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award on October 31, 2021. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $18.50-$19.22. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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August 05, 2021 Filed Aug 6, 2021 12:56 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 11,943 $12.54 $149,765.22
Disclosure

SEC source: 0001209191-21-050087 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 244,319

F1 · kind: Mr. Kosiba elected to take his cash payout, net of applicable taxes and withholdings, under the terms of the American Superconductor Corporation (the "Company") fiscal 2020 executive incentive plan in immediately vested shares of the Company with an equal fair market value based on the August 5, 2021 closing price of the Company's common stock. This award of immediately vested shares of the Company was awarded to Mr. Kosiba on August 5, 2021 and made in accordance with the Company's 2007 Stock Incentive Plan.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 244,319 shares directly.

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July 01, 2021 Filed Jul 6, 2021 21:14 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 6,409 $17.66 $113,182.94
Disclosure

SEC source: 0001209191-21-045570 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 232,376

F1 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award on June 28, 2021. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $17.30-$18.07. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 232,376 shares directly.

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May 24, 2021 Filed May 24, 2021 21:38 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 5,794 $14.18 $82,141.54
Disclosure

SEC source: 0001209191-21-035469 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 238,785

F2 · kind: Represents the number of shares sold by the reporting person to cover tax withholding obligations in connection with the vesting of a restricted stock award on May 21, 2021. The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F3 · price: The sales were executed in multiple trades at prices ranging from $13.88-$14.86. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F4 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 238,785 shares directly.

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May 20, 2021 Filed May 24, 2021 21:38 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 GrantCommon Stock 30,000 $0.00 $0.00
Disclosure

SEC source: 0001209191-21-035469 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 244,579

F1 · shares: The restricted stock award was granted on May 20, 2021. The award will vest as follows: (a) 4,000 shares will vest on May 20, 2022, 4,000 shares will vest on May 20, 2023, and 4,000 shares will vest on May 20, 2024, and (b) 18,000 shares will vest upon the achievement of specified performance objectives.

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January 21, 2021 Filed Jan 22, 2021 21:39 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 10,661 $28.03 $298,780.92
Disclosure

SEC source: 0001209191-21-004891 · doc4.xml · nonDerivative · entry 3

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 214,579

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F4 · price: The sales were executed in multiple trades at prices ranging from $27.99-$28.08. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F5 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 214,579 shares directly.

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January 21, 2021 Filed Jan 22, 2021 21:39 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 8,333 $27.66 $230,505.78
Disclosure

SEC source: 0001209191-21-004891 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 225,240

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F3 · price: The sales were executed in multiple trades at prices ranging from $26.99-$27.985. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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January 21, 2021 Filed Jan 22, 2021 21:39 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 6,100 $26.56 $162,025.76
Disclosure

SEC source: 0001209191-21-004891 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 233,573

F1 · kind: The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 Plan.

F2 · price: The sales were executed in multiple trades at prices ranging from $25.99-$26.98. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

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November 25, 2020 Filed Nov 30, 2020 22:32 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 SaleCommon Stock 25,000 $19.28 $481,960.00
Disclosure

SEC source: 0001209191-20-060763 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 239,673

F1 · price: The sales were executed in multiple trades at prices ranging from $19.2075-$19.63. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide, upon request, to the SEC staff, the issuer, or a security holder of the issuer, full information regarding the number of shares and price at which the transaction was effected.

F2 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 239,673 shares directly.

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November 01, 2020 Filed Nov 2, 2020 21:42 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 Tax withholdingCommon Stock 7,321 $13.91 $101,835.11
Disclosure

SEC source: 0001209191-20-056421 · doc4.xml · nonDerivative · entry 2

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 264,673

F2 · shares: Represents 7,321 shares surrendered to the Company to satisfy the reporting person's tax withholding obligation upon the vesting of shares of restricted stock on November 1, 2020; not an open market transaction.

F3 · balance_after: Following all the transactions reported on this Form 4, the reporting person holds 264,673 shares directly.

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October 31, 2020 Filed Nov 2, 2020 21:42 UTC AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC · Entity 4752 Tax withholdingCommon Stock 3,774 $13.91 $52,496.34
Disclosure

SEC source: 0001209191-20-056421 · doc4.xml · nonDerivative · entry 1

Kosiba John W JR · CIK 0001703463 · SVP, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 271,994

F1 · shares: Represents 3,774 shares surrendered to the Company to satisfy the reporting person's tax withholding obligation upon the vesting of shares of restricted stock on October 31, 2020; not an open market transaction.

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Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.