Welcome to our dedicated page for C3is SEC filings (Ticker: CISS), 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 C3is Inc. (CISS) SEC filings page brings together the company’s regulatory disclosures as a foreign private issuer in the deep sea freight transportation sector. C3is Inc. files annual reports on Form 20-F and furnishes interim information on Form 6-K, covering its dry bulk and crude oil seaborne transportation business, which is based on three Handysize dry bulk carriers and an Aframax oil tanker with a combined capacity of 213,464 deadweight tons (dwt).
Recent Form 6-K filings include press releases with unaudited financial and operating results for the first, second and third quarters, as well as six- and nine-month periods. These filings provide details on voyage revenues, time charter equivalent (TCE) rates, fleet utilization, voyage and operating expenses, and non-GAAP measures such as EBITDA, Adjusted EBITDA and Adjusted Net Income. Other 6-Ks furnish Management’s Discussion and Analysis of Financial Condition and Results of Operations and consolidated financial statements for interim periods.
C3is Inc. also uses Form 6-K to disclose capital markets transactions, such as registered direct offerings and public offerings of common shares, units, pre-funded warrants and different classes of warrants. Filings describe placement agency agreements, securities purchase agreements, forms of Class D, Class E and pre-funded warrants, and the terms under which these instruments are exercisable. Certain 6-Ks note that the information is incorporated by reference into existing registration statements on Form S-8 and Form F-3.
On this page, AI-powered tools can help summarize lengthy C3is Inc. filings, highlight key terms in equity offerings, and clarify the impact of warrant structures and non-cash fair value changes on reported results. Users can quickly locate quarterly and annual disclosures, proxy materials, and offering-related documents, and use AI-generated insights to understand how the company’s shipping operations, financing activities and warrant liabilities are reflected across its SEC reporting.
C3is Inc. filed a Current Report on Form 6-K that attaches a Securities Purchase Agreement, a legal opinion from Reeder & Simpson P.C., and a press release dated
C3is Inc. completed a corporate separation from Imperial Petroleum via a
C3IS Inc. Schedule 13G/A amendment reports common stock ownership by Pandora Consultants II SA and two individuals who control that entity. Pandora Consultants II SA holds 42,940 shares, representing 2.7% of the class. Mr. Nikolaos Vafias and Ms. Theano Vafias control Pandora Consultants II SA and therefore indirectly beneficially own 42,940 shares; Nikolaos Vafias also reports 6 shares of sole voting and dispositive power, bringing his aggregate to 42,946 shares (2.7%). The filing is an amendment and lists the issuer address in Athens and CUSIP Y18284169. The reporting persons certify the shares were not acquired to influence control of the issuer.
C3is Inc. Schedule 13D Amendment No. 3 updates ownership percentages for reporting persons following the issuer's updated count of outstanding shares and issuance on exercise of warrants. The filing is made by Flawless Management Inc., Arethusa Properties LTD and Harry N. Vafias under a Joint Filing Agreement. It discloses post-reverse-split share counts and percentages: Flawless beneficially owns 4 shares (0.01%), Arethusa beneficially owns 72,331 shares (4.5%), and Harry N. Vafias beneficially owns 100,577 shares (6.3%), which includes 5,000 vested option shares and excludes 5,000 unvested options vesting September 16, 2026. Mr. Vafias is identified as Non-Executive Chairman. The amendment notes no transactions in the past 60 days other than the ownership update and attaches a Joint Filing Agreement as Exhibit 1.
C3is Inc. received an Amendment No. 1 to a Schedule 13G filed jointly by Wexford Capital LP, Wexford GP LLC, Charles E. Davidson and Joseph M. Jacobs reporting shared beneficial ownership of 112,014 shares of Common Stock, representing 7.02% of the 1,596,407 shares outstanding as reported to Wexford Capital on September 26, 2025. The filing explains that Wexford Capital serves as sub-advisor or investment manager to several Wexford Funds that hold the shares and that Wexford GP, Davidson and Jacobs may be deemed to beneficially own the securities by virtue of their relationships with Wexford Capital and the funds. Each Reporting Person disclaims beneficial ownership except to the extent of pecuniary interest.
C3is Inc. Schedule 13G shows Wexford-affiliated reporting persons jointly hold 110,382 shares of C3is common stock, representing 10.23% of the 1,079,208 shares outstanding used for the calculation. The holdings are reported as shared voting and dispositive power with no sole voting or dispositive power. The filing attributes ownership to certain Wexford funds and explains that Wexford Capital LP, Wexford GP LLC, Charles E. Davidson and Joseph M. Jacobs share the power to vote and dispose of the shares, while disclaiming beneficial ownership except to the extent of pecuniary interest for Davidson and Jacobs. The percentage is based on the issuer's Form F-1 reported share count as of August 31, 2025, and the ownership position is stated as of September 22, 2025.
C3is Inc. filed a Form 6-K to furnish a press release with its preliminary financial and operating results for the three and six months ended June 30, 2025. The attached press release, dated September 2, 2025 and filed as Exhibit 99.1, contains these preliminary figures for both 2025 and 2024. The company notes that its independent accountants have not compiled, examined, or performed any procedures on these preliminary results, have not expressed any opinion or assurance, and disclaim any association with them. Most of this Form 6-K, including Exhibit 99.1 but excluding the section titled “CEO Dr. Diamantis Andriotis Commented:”, is incorporated by reference into C3is Inc.’s existing Form S-8 and Form F-3 registration statements.