Welcome to our dedicated page for SOLUNA HOLDINGS SEC filings (Ticker: SLNH), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
The Soluna Holdings, Inc. (Nasdaq: SLNH) SEC filings page on Stock Titan centralizes the company’s regulatory disclosures, giving investors structured access to its capital markets activity, project updates, and governance decisions. As a Nevada-incorporated issuer with common stock (SLNH) and 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP) listed on Nasdaq, Soluna files current reports, registration statements, and proxy materials that document key aspects of its renewable-powered computing business.
Through Form 8-K filings, Soluna reports material events such as its registered direct offering of common stock, pre-funded warrants, and Series C warrants, the closing of that offering, and related placement agent arrangements. Other 8-Ks describe the completion and full energization of Project Dorothy 2 in West Texas, monthly corporate and site-level updates, new hosting partnerships, and board changes. These filings help clarify how Soluna finances and executes projects like Dorothy, Kati, Sophie, and Grace, and how it expands its Bitcoin hosting, AI/HPC hosting, and demand response activities.
Registration statements, including the company’s shelf registration on Form S-3 and an S-1 related to the resale of common shares, outline Soluna’s capital-raising framework and provide additional detail on its Renewable Computing™ model, business lines, and risk factors. Definitive proxy materials, such as the DEF 14A for a special meeting, document stockholder votes on matters like increasing authorized common shares and adjournment proposals.
On this page, Stock Titan pairs real-time updates from the SEC’s EDGAR system with AI-powered summaries that explain the significance of each filing in plain language. Users can quickly review 10-K and 10-Q reports when available, analyze 8-K disclosures about financings and project milestones, and examine ownership-related documents such as preferred stock listings or warrant agreements, all within the context of Soluna’s renewable-powered data center strategy.
Soluna Holdings, Inc. reported that a company director sold shares of its 9.0% Series A Cumulative Perpetual Preferred Stock over three days in December 2025. On 12/10/2025, the director sold 2,000 preferred shares at an average price of $9.70 per share, leaving 11,748 shares beneficially owned. On 12/11/2025, the director sold 741 preferred shares at $9.90 per share, reducing holdings to 11,007 shares. On 12/12/2025, the director sold another 2,000 preferred shares at an average price of $9.76 per share, and directly beneficial ownership stood at 9,007 preferred shares after these transactions.
Soluna Holdings reported an insider transaction involving its 9.0% Series A Cumulative Perpetual Preferred Stock. Director Mr. Phelan sold 7,001 preferred shares on 12/10/2025 at an average price of $9.58 per share, leaving him with 127,970 shares of this series.
On 12/11/2025, he sold an additional 3,737 preferred shares at an average price of $9.52 per share, after which he beneficially owned 124,233 shares of the same preferred stock.
Soluna Holdings, Inc. reported insider equity activity by its Chief Accounting Officer. On December 1, 2025, the officer received a grant of 226,108 restricted stock awards representing shares of common stock, par value
On the same date, a separate transaction coded "F" involved the disposition of 3,412 shares of common stock at a price of
Soluna Holdings, Inc. reported that it has closed a previously announced registered direct offering priced at-the-market under Nasdaq rules. The transaction involves the purchase and sale of 18,079,144 shares of common stock, or pre-funded warrants in lieu of common stock, together with accompanying Series C warrants to purchase up to 18,079,144 additional common shares. The securities were sold at a purchase price of $1.77 per share, or per pre-funded warrant, with each share or pre-funded warrant accompanied by a Series C warrant. The company disclosed this event through a press release dated December 8, 2025, which is furnished as an exhibit.
Soluna Holdings, Inc. is raising capital through a registered direct offering of 5,929,944 shares of common stock, pre-funded warrants to purchase up to 12,149,200 shares, and Series C warrants to purchase up to 18,079,144 shares. Each common share and accompanying Series C warrant is priced at $1.77, and the company expects gross proceeds of approximately $32 million before fees and expenses.
The pre-funded warrants are immediately exercisable at $0.001 per share with beneficial ownership capped at 4.99% or, at a holder’s election, 9.99%. The Series C warrants are immediately exercisable at $1.65 per share and expire five years after issuance, with similar ownership caps and cash or cashless exercise mechanics. Soluna plans to use the proceeds for working capital, project-level equity, and general corporate purposes.
H.C. Wainwright & Co. is acting as placement agent, earning a 7.0% cash fee and placement agent warrants for up to 903,957 shares at an exercise price of $2.2125. On the same date, Soluna suspended use of its prior at-the-market offering prospectus and will not sell stock under that ATM program until a new prospectus supplement is filed.
Soluna Holdings, Inc. director reported receiving a grant of 685,074 shares of the company’s common stock as restricted stock awards on 12/01/2025. The grant was approved by the Compensation Committee and recorded at a price of $0 per share, reflecting that it is an equity compensation award rather than an open-market purchase.
The reporting person now beneficially owns 976,318 shares of common stock in direct ownership after this grant. All of the granted restricted shares will vest 100% upon the reporting person’s separation from Soluna Holdings, creating a single vesting event tied to the end of their service with the company.
Soluna Holdings, Inc. reported that one of its directors received a grant of 685,074 shares of common stock as restricted stock awards. The grant was approved by the company’s Compensation Committee and recorded as an acquisition at a price of $0 per share. Following this grant, the director beneficially owns 977,158 shares of Soluna common stock in direct ownership.
The restricted shares will vest 100% upon the director’s separation from the company, meaning the director gains full rights to all of these shares only when service with Soluna ends. This filing is a disclosure of insider equity compensation rather than a market purchase or sale.
Soluna Holdings, Inc. director reported sales of the company’s 9.0% Series A Cumulative Perpetual Preferred Stock (SLNHP). On 11/21/2025, the insider sold 100 shares at $7.45 and 1,900 shares at $7.18, all listed as direct ownership. On 11/24/2025, the director sold an additional 1,000 shares at $8.00.
After these transactions, the reporting person directly beneficially owned 14,748 shares of the preferred stock. The filing notes the individual’s relationship to Soluna as a director and indicates the form was filed for a single reporting person.
Soluna Holdings, Inc. (SLNH) reported an insider stock transaction by its Chief Executive Officer and director. On 11/21/2025, the reporting person sold 4,300 shares of common stock at $1.45 per share and 4,922 shares at $1.44 per share. These open-market sales totaled 9,222 shares. After the transactions, the insider directly owned 1,212,478 shares of Soluna common stock.
Soluna Holdings, Inc. director reports preferred stock transactions. A company director filed a Form 4 disclosing activity in the 9.0% Series A Cumulative Perpetual Preferred Stock of Soluna Holdings, Inc. [SLNHP]. On 11/19/2025 the director sold 100 shares at $7.58 per share, and on 11/20/2025 sold an additional 500 shares at $7.80 per share. On 11/21/2025, 36,500 shares were reported as a transaction coded “G” at a price of $0, indicating a transfer such as a gift. Following these transactions, the director beneficially owned 134,971 shares of the preferred stock, held directly.