# EDGAR Filing Document

**Accession Number:** 0000880807
**File Stem:** 0001193125-25-140738
**Filing Date:** 2025-6
**Character Count:** 5136
**Document Hash:** a775e26920c44b502fb380183ac91aaf
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-140738.hdr.sgml**: 20250613

**ACCESSION NUMBER**: 0001193125-25-140738

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 4

**FILED AS OF DATE**: 20250613

**DATE AS OF CHANGE**: 20250613

**FILER**: 

**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

**FILING VALUES:**
- **FORM TYPE:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 000-19672
- **FILM NUMBER:** 251046558

**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

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**WASHINGTON, DC 20549** 

**SCHEDULE 14A** 

**(RULE 14a-101)** 

**INFORMATION REQUIRED IN** 

**PROXY STATEMENT** 

**SCHEDULE 14A INFORMATION** 

**Proxy Statement Pursuant to Section 14(a) of** 

**the Securities Exchange Act of 1934** 

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))** 

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

**American Superconductor Corporation** 

**(Name of Registrant as Specified in its Charter)** 

**(Name of Person(s) Filing Proxy Statement, if Other than Registrant)** 

Payment of Filing Fee (Check all boxes that apply):

☒ No fee required.

☐ Fee paid previously with preliminary materials.

☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

------

![LOGO](g874515dsp1n.jpg)

You invested in AMERICAN SUPERCONDUCTOR CORPORATION and it's time to vote!

You have the right to vote on proposals being presented at the Annual Meeting. **This is an important notice regarding the availability of proxy materials for the stockholder meeting to be held on July 25, 2025.**

Get informed before you vote

View the Notice and Proxy Statement and Annual Report online OR you can receive a free paper or email copy of the material(s) by requesting prior to July 11, 2025. If you would like to request a copy of the material(s) for this and/or future stockholder meetings, you may (1) visit www.ProxyVote.com, (2) call 1-800-579-1639 or (3) send an email to sendmaterial@proxyvote.com. If sending an email, please include your control number (indicated below) in the subject line. Unless requested, you will not otherwise receive a paper or email copy.

![LOGO](g874515dsp1na.jpg)

\*Please check the meeting materials for any special requirements for meeting attendance.

------

**Vote at www.ProxyVote.com** 

**THIS IS NOT A VOTABLE BALLOT** 

This is an overview of the proposals being presented at the

upcoming stockholder meeting. Please follow the instructions on

the reverse side to vote these important matters.

---

| | | | |
|:---|:---|:---|:---|
| **Voting Items** | **Voting Items** |  | **Board** <br> **Recommends**  |
| 1. | Election of Directors |  | <br> ![LOGO](g874515dsp2n.jpg)**For** |
|  | <br> **Nominees:** |  | <br> ![LOGO](g874515dsp2n.jpg)**For** |
|  | <br> 01) Laura A. Dambier | <br> 05) Barbara G. Littlefield | <br> ![LOGO](g874515dsp2n.jpg)**For** |
|  | 02) Terence R. Donnelly | 06) Daniel P. McGahn | <br> ![LOGO](g874515dsp2n.jpg)**For** |
|  | 03) Arthur H. House | 07) David R. Oliver, Jr. | <br> ![LOGO](g874515dsp2n.jpg)**For** |
|  | 04) Margaret D. Klein |  | <br> ![LOGO](g874515dsp2n.jpg)**For** |
| 2. | To ratify the appointment by the Audit Committee of the Board of Directors of RSM US LLP as AMSC's independent registered public accounting firm for the current fiscal year. | To ratify the appointment by the Audit Committee of the Board of Directors of RSM US LLP as AMSC's independent registered public accounting firm for the current fiscal year. | ![LOGO](g874515dsp2n.jpg) **For** |
| 3. | To approve, on an advisory basis, the compensation of AMSC's named executive officers. | To approve, on an advisory basis, the compensation of AMSC's named executive officers. | ![LOGO](g874515dsp2n.jpg) **For** |
| &nbsp;&nbsp; **NOTE:** To transact such other business as may properly come before the annual meeting or any continuation, postponement or adjournment thereof. | &nbsp;&nbsp; **NOTE:** To transact such other business as may properly come before the annual meeting or any continuation, postponement or adjournment thereof. | &nbsp;&nbsp; **NOTE:** To transact such other business as may properly come before the annual meeting or any continuation, postponement or adjournment thereof. |  |

---

Prefer to receive an email instead? While voting on www.ProxyVote.com, be sure to click "Delivery Settings".

V75834-P34814-Z90445