0000064463 2026-04-01 2026-04-01 0000064463 SLNH:CommonStockParValue0.001PerShareMember 2026-04-01 2026-04-01 0000064463 SLNH:Sec9.0SeriesCumulativePerpetualPreferredStockParValue0.001PerShareMember 2026-04-01 2026-04-01 true 0000064463 8-K/A 2026-04-01 SOLUNA HOLDINGS, INC. NV 001-40261 14-1462255 325 Washington Avenue Extension Albany NY 12205 (516) 216-9257 false false false false Common stock, par value $0.001 per share SLNH NASDAQ 9.0% Series A Cumulative Perpetual Preferred Stock, par value $0.001 per share SLNHP NASDAQ false This Amendment No. 1 on Form 8-K/A (this “Amendment”) is being filed by Soluna Holdings, Inc. (the “Company”) to amend and supplement its Current Report on Form 8-K filed with the Securities and Exchange Commission on April 1, 2026 (the “Original Report”). As previously disclosed in the Original Report, on April 1, 2026, Soluna DV Wind SponsorCo, LLC, a wholly owned indirect subsidiary of the Company, acquired one hundred percent (100%) of the issued and outstanding equity interests in Briscoe Wind Farm, LLC, a Delaware limited liability company (the “Briscoe Project Company”), pursuant to that certain Membership Interest Purchase Agreement with Briscoe Wind Project Holdings I, LLC, JPM Capital Corporation and Morgan Stanley Wind LLC (the “Acquisition”)The Company is filing this Amendment solely to supplement Item 9.01 of the Original Report to file (i) the audited financial statements of the Briscoe Project Company as of and for the years ended December 31, 2025 and 2024, and (ii) the unaudited pro forma condensed combined financial information of the Company as of and for the year ended December 31, 2025, which gives effect to the Acquisition as if it had been consummated on January 1, 2025. Except for the foregoing, this Amendment does not modify or update any other disclosure contained in the Original Report.