Company: SLNH
Filing Date: 2025-10-16
Form Type: S-3/A
Source: 0001493152-25-018322
Chunk: 1

Company: Soluna Holdings, Inc
Filing Date: 2025-10-16
Form: S-3/A
Chunk 1
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 the Securities Act, 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 registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

| Large accelerated filer: | ☐ | Accelerated filer:         | ☐ |
| Non-accelerated filer:   | ☒ | Smaller reporting company: | ☒ |
|                          |   | Emerging growth company:   | ☐ |

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act. ☐

This registration statement shall hereafter become effective in accordance with the provisions of Section 8(a) of the Securities Act of 1933.

<div align='center'>EXPLANATORY NOTE</div>

This Amendment No. 1 (“Amendment No. 1”) to the Registration Statement on Form S-3 (Registration No. 333-290546) of Soluna Holdings, Inc. (the “Registration Statement”) is being filed solely for the purpose of including language provided by Rule 473(b) of the Securities Act of 1933, as amended, for the automatic effectiveness of the Registration Statement 20 days following the filing of Amendment No. 1.

The information in this preliminary prospectus is not complete and may be changed. The selling securityholder may not sell these securities pursuant to this prospectus until the registration statement filed with the Securities and Exchange Commission is effective. This preliminary prospectus is not an offer to sell