0001193125-26-255471.txt : 20260603 0001193125-26-255471.hdr.sgml : 20260603 20260603161555 ACCESSION NUMBER: 0001193125-26-255471 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260601 FILED AS OF DATE: 20260603 DATE AS OF CHANGE: 20260603 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Kosiba John W JR CENTRAL INDEX KEY: 0001703463 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 000-19672 FILM NUMBER: 261060831 MAIL ADDRESS: STREET 1: C/O AMERICAN SUPERCONDUCTOR CORPORATION STREET 2: 64 JACKSON ROAD CITY: DEVENS STATE: MA ZIP: 01434 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: AMERICAN SUPERCONDUCTOR CORP /DE/ CENTRAL INDEX KEY: 0000880807 STANDARD INDUSTRIAL CLASSIFICATION: MOTORS & GENERATORS [3621] ORGANIZATION NAME: 04 Manufacturing EIN: 042959321 STATE OF INCORPORATION: DE FISCAL YEAR END: 0331 BUSINESS ADDRESS: STREET 1: SIXTY FOUR JACKSON ROAD CITY: DEVENS STATE: MA ZIP: 01434 BUSINESS PHONE: 9788423000 MAIL ADDRESS: STREET 1: SIXTY FOUR JACKSON ROAD CITY: DEVENS STATE: MA ZIP: 01434 4 1 ownership.xml 4 X0609 4 2026-06-01 0000880807 AMERICAN SUPERCONDUCTOR CORP /DE/ AMSC 0001703463 Kosiba John W JR false C/O AMERICAN SUPERCONDUCTOR CORPORATION 114 EAST MAIN ST AYER MA 01432 false true false false SVP, CFO & Treasurer true Common Stock 2026-06-01 4 A false 30000 0 A 382890 D Common Stock 2026-06-02 4 S false 5704 49.461 D 377186 D Common Stock 2026-06-02 4 S false 12122 50.6188 D 365064 D Common Stock 2026-06-02 4 S false 12036 51.466 D 353028 D Common Stock 2026-06-02 4 S false 600 52.1917 D 352428 D Common Stock 2026-06-03 4 S false 3200 48.3069 D 349228 D Common Stock 2026-06-03 4 S false 2638 49.2846 D 346590 D Common Stock 2026-06-03 4 S false 609 50.8258 D 345981 D Common Stock 320 I By 401(k) plan The restricted stock award was granted on June 1, 2026. The award will vest in three equal annual installments beginning June 10, 2027. 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. 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. 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. 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. 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. 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. 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. 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. Following all the transactions reported on this Form 4, the reporting person holds 345,981 shares directly. Following all the transactions reported on this Form 4, the reporting person holds 320 shares indirectly through the company's 401(k) plan as of June 3, 2026. /s/ John W. Kosiba, Jr. 2026-06-03