Company: SLNH
Filing Date: 2025-04-18
Form Type: POS AM
Source: 0001641172-25-005429
Chunk: 1

Company: Soluna Holdings, Inc
Filing Date: 2025-04-18
Form: POS AM
Chunk 1
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 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(d) under 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. ☐

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. ☐

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act of 1933 or until the Registration Statement shall become effective on such date as the Securities and Exchange Commission, acting pursuant to said Section 8(a), may determine.

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

On October 9, 2024, Soluna Holdings, Inc. (the “Company”)
filed a Registration Statement (as amended, the “Original Registration Statement”) on Form S-1 (File No. 333-282559) with
the Securities and Exchange Commission (the “SEC”). The Original Registration Statement was declared effective by the SEC
on February 5, 2025 and initially registered the offer and sale from time to time by the selling stockholders named herein of up to 3,508,024
shares of our common stock, par value $0.001 per share (“Common Stock”).

This Post-Effective Amendment No. 1 (this “Amendment”) to the Original Registration Statement is being filed to (i)