Company: SLNH
Filing Date: 2025-10-20
Form Type: DEFA14A
Source: 0001493152-25-018649
Chunk: 0

Company: Soluna Holdings, Inc
Filing Date: 2025-10-20
Form: DEFA14A
Chunk 0
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<div align='center'>UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

(Amendment No. )</div>

Filed by the Registrant ☒

Filed by a party other than the Registrant ☐

Check the appropriate box:

| ☐ | Preliminary Proxy Statement                                |
| ☐ | Confidential, for Use of the Commission Only (as permitted 
 by Rule 14a-6(e)(2))                                       |
| ☐ | Definitive Proxy Statement                                 |
| ☐ | Definitive Additional Materials                            |
| ☒ | Soliciting Material under §240. 14a-12                     |

<div align='center'>SOLUNA HOLDINGS, INC.

(Name of Registrant as Specified in Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)</div>

Payment of Filing Fee (Check all boxes that apply):

| ☒ | No fee required                                                              |
| ☐ | Fee paid previously with                                                     
 preliminary materials                                                        |
| ☐ | Fee computed on table in                                                     
 exhibit required by Item 25(B) per Exchange Act Rules 14(a)-6(i)(1) and 0-11 |

The following are social media posts that will be posted by Soluna Holdings, Inc. on social media sites beginning on October 20, 2025.

<div align='center'>Soluna Holdings Proxy Vote Content</div>

Social Media Copy

“Vote Now!”

Greetings Stockholders! 📣 Your vote matters.

Support Soluna’s continued growth and momentum by voting FOR all proposals at the upcoming Special Meeting.

Contact Alliance Advisors at 1-855-206-1311 to VOTE your shares TODAY.

Learn more: https://www.solunacomputing.com/investors/updates/proxy-vote-faqs/

#SLNH $SLNH

EVERY vote counts.

Stockholders, Vote FOR all proposals today.

Contact Alliance Advisors at 1-855-206-1311 to VOTE your shares TODAY.

Learn more: https://www.solunacomputing.com/investors/updates/proxy-vote-faqs/

#SLNH $SLNH

💥 Our Special Meeting proxy vote is open.

If you’re a stockholder, you are an owner. Please make sure your voice is