Company: SLNH
Filing Date: 2025-10-27
Form Type: DEFA14A
Source: 0001493152-25-019749
Chunk: 0

Company: Soluna Holdings, Inc
Filing Date: 2025-10-27
Form: DEFA14A
Chunk 0
---
<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 contains social media posts thathave been posted by Soluna Holdings, Inc. on social media sites beginning on October 20, 2025and an updated FAQ that will be posted by Soluna Holdings, Inc. on its website and social media sites beginning on October 27, 2025.

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

Social Media Copy

<div align='center'>“Vote Now!”</div>

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