Amendments to Bylaws (Form 8-K)

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

Soluna Holdings, Inc. (the "Company") previously designated 187,500 shares of preferred stock as Series B Convertible Preferred Stock (the "Preferred Stock"). In 2026, the previously issued and outstanding 62,500 shares of Preferred Stock were converted, in their entirety, to 6,510,416 shares of common stock of the Company. Accrued dividends of $2.1 million were paid upon the full conversion of such shares of Preferred Stock.

On June 23, 2026, the Company filed a Withdrawal of Designation relating to the Preferred Stock (the "Withdrawal of Designation") with the Secretary of State of the State of Nevada and terminated the designation of the Preferred Stock. At the time of the filing of the Withdrawal of Designation, no shares of Preferred Stock were outstanding. The Withdrawal of Designation was effective upon filing and eliminated from the Company's Articles of Incorporation, as amended, all matters set forth in the previously-filed Certificate of Designation with respect to the previously designated Preferred Stock.