Company: SLNH
Filing Date: 2025-12-05
Form Type: 424B5
Source: 0001493152-25-026274
Chunk: 71

Company: Soluna Holdings, Inc
Filing Date: 2025-12-05
Form: 424B5
Chunk 71
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 incorporated by reference herein or therein modifies or supersedes such statement. Any statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this prospectus or any prospectus supplement.

We will provide you without charge, upon your oral or written request, with a copy of any or all reports, proxy statements and other documents we file with the SEC, as well as any or all of the documents incorporated by reference in this prospectus or the registration statement (other than exhibits to such documents unless such exhibits are specifically incorporated by reference into such documents). Requests for such copies should be directed to:

<div align='center'>Soluna Holdings, Inc.
325 Washington Avenue Extension
Albany, NY 12205

(518) 218-2550

Attn: Christopher Gandolfo
hello@soluna.io</div>

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<div align='center'>5,929,944Shares of Common Stock

Pre-Funded Warrants to Purchase 12,149,200 Shares of Common Stock

Series C Warrants to Purchase 18,079,144 Shares of Common Stock

Placement Agent Warrants to Purchase 903,957 Shares of Common Stock

31,132,301 Shares of Common Stock underlying the Pre-Funded Warrants, Series C Warrants and Placement Agent Warrants

PROSPECTUS SUPPLEMENT

H.C. Wainwright & Co.

The date of this prospectus supplement is December 4, 2025.</div>