Company: SLNH
Filing Date: 2025-09-26
Form Type: S-3
Source: 0001493152-25-015742
Chunk: 0

Company: Soluna Holdings, Inc
Filing Date: 2025-09-26
Form: S-3
Chunk 0
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<div align='center'>As filed with the Securities and Exchange Commission on September 26, 2025</div>

Registration No. 333-

<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

Soluna Holdings, Inc.

(Exact name of registrant as specified in its charter)</div>

| Nevada                   |     | 14-1462255     |
| (State                   
 or Other Jurisdiction of 
 Incorporation            
 or Organization)         |     | -I.R.S.        
 Employer       
 Identification 
 Number         |

<div align='center'>325 Washington Avenue Extension

Albany, New York 12205

(516) 216-9257

(Address, including zip code, and telephone number,

including area code, of registrant’s principal executive offices)

John Belizaire

Chief Executive Officer

Soluna Holdings, Inc.

325 Washington Ave Extension

Albany, New York 12205

(516) 216-9257

(Name, address, including zip code, and telephone number,

including area code, of agent for service)

Copies to:

Steven E. Siesser, Esq.

Daniel L. Forman, Esq.

Lowenstein Sandler LLP

1251 Avenue of the Americas

New York, New York 10020

(212) 204-8688</div>

Approximate date of commencement of proposed sale to the public: From time to time, as determined by the Selling Securityholder, after this Registration Statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box: ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box: ☒

If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering. ☐

If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act