Capstone Green Energy Holdings, Inc.

We file annual, quarterly, and current reports, proxy statements, and other information with the SEC. The SEC maintains a website athttp://www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC.

A copy of this Proxy Statement and our 2025 Annual Report has been posted on the Internet. Capstone will undertake to provide promptly without charge to each person to whom a copy of this Proxy Statement is delivered, upon the written request of any such person, a copy of Capstone’s Annual Report on Form 10-K for the year ended March 31, 2025 as filed with the SEC. Requests for such copies should be addressed to Capstone Green Energy Holdings, Inc., 16640 Stagg Street, Van Nuys, California 91406, Attn: Investor Relations. Requests can also be made by calling the Company at (818) 407-3628.