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. director Ioannis Kostogiannis filed an initial Form 3, which is a required report of insider holdings. The filing shows no reported purchases, sales, option exercises, gifts, or other equity transactions, indicating this is an administrative disclosure rather than a trading event.
C3is Inc. director Georgios Xiradakis filed an initial Form 3, which is a required statement of beneficial ownership for insiders. The filing reports no transactions and shows no equity transactions or derivative positions, indicating this is a baseline disclosure rather than a new trade.
C3is Inc. filed an initial insider ownership report for Pyndiah Nina Sarojini, who serves as Chief Financial Officer. This Form 3 does not list any reported transactions or derivative positions and shows no buy, sell, acquisition, or disposition activity at this time.
C3is Inc. director Harry Vafias filed an initial ownership report showing his equity stake. He directly holds 1,162 shares of common stock and indirectly holds 3,616 shares through Arethusa Properties LTD. He also has a stock option over 500 common shares at an exercise price of $348.00 per share, half of which is already vested and exercisable, with the remaining half scheduled to vest on September 16, 2026, subject to his continued service.
C3is Inc. CEO and President Adamantios Andriotis filed an initial insider ownership report on Form 3. This filing establishes his status as a director and officer of C3is Inc. The data provided shows no reported stock purchases, sales, or other equity transactions.
C3is Inc. Schedule 13G filed by Alta Partners LLC reports beneficial ownership of 56,176 shares, representing shares issuable upon exercise of warrants, equal to 5.2% of the class. The filing states sole voting and dispositive power over the 56,176 shares. The form is signed by Steven Cohen on 02/27/2026.
C3is Inc. entered an At-The-Market issuance sales agreement to sell up to $98 million of common shares through Aegis Capital Corp. under an existing Form F-3 registration statement, with timing and amounts determined at the company’s sole discretion.
The company stated proceeds are intended for working capital and general corporate purposes, which may include part of the purchase price for two MR product tankers the company has contracted. The Sales Agreement and legal opinion are filed as exhibits.
C3is Inc. enters an At-The-Market facility to sell up to $98 million of common shares. The Sales Agreement with Aegis Capital Corp., dated February 25, 2026, permits the company to sell shares from time to time under its effective Form F-3 registration.
The company states proceeds are intended for working capital and general corporate purposes, which may include partial payment for two MR product tankers the company has contracted or other vessel acquisitions.
C3is Inc. filed a prospectus supplement and Form 6-K announcing an At-The-Market (ATM) sales agreement permitting up to $98 million of common stock to be sold through Aegis Capital Corp. under the company’s effective Form F-3 registration statement.
The company may sell shares at its discretion and intends to use net proceeds for working capital and general corporate purposes, which may include payment toward two contracted MR product tankers or other vessel acquisitions. The offering will be made pursuant to the previously declared effective registration statement and related prospectus materials.
C3is Inc. launches an at-the-market (ATM) facility to sell up to $98 million of common shares through Aegis Capital Corp. The Company may sell shares from time to time at its discretion under an At-The-Market Issuance Sales Agreement dated February 25, 2026, using a Registration Statement on Form F-3 declared effective March 6, 2025.
The Company intends to use proceeds for working capital and general corporate purposes, which may include payment of part of the purchase price for two MR product tankers or other vessel acquisitions. Sales will be made pursuant to prospectus supplements to the effective registration statement.