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 prospectus supplement to update its existing offering documents with new information about a vessel purchase. Through an attached Form 6-K, the company reports an agreement to acquire a 2011 South Korean-built product tanker with 47,203 deadweight tons capacity for
The vessel is expected to be delivered between Q1 and Q2 2026, and C3is has the option to pay the purchase price one year after the agreement date without interest. After this vessel is delivered, and assuming only the previously announced product tanker acquisition also closes, C3is expects to operate a fleet of six vessels with total capacity of 310,667 deadweight tons, including three Handysize drybulk carriers, one Aframax oil tanker and two product tankers.
C3is Inc. has agreed to acquire a 2011 South Korean-built product tanker with 47,203 deadweight tons of capacity for a purchase price of $22.9 million from an entity affiliated with Brave Maritime Corp Inc. The deal involves related parties connected to the Vafias family and was approved by the Company’s independent directors, who obtained independent vessel valuations and used the average of those valuations to set the price.
The tanker is expected to be delivered between Q1 and Q2 2026, and C3is has the option to pay the purchase price one year after the agreement date without interest. After delivery of this vessel and the previously announced pending product tanker, the Company expects to operate a fleet of six vessels with a total capacity of 310,667 deadweight tons, including three Handysize drybulk carriers, one Aframax oil tanker and two product tankers.
Evergreen Capital Management LLC filed an amended Schedule 13G reporting beneficial ownership of 9.99% of C3is Inc. common stock. The firm reports beneficial ownership of 443,213 securities, consisting of 425,000 common shares and 18,213 pre-funded warrants to purchase common shares. The 9.99% figure is based on 4,418,378 C3is common shares outstanding after an offering, as described in a prospectus filed under Rule 424(b)(4). Evergreen notes additional pre-funded and Series D and E warrants to purchase common shares that are subject to a 9.99% beneficial ownership limitation, so these are not included in the reported amount. The filing certifies that the securities are not held for the purpose of changing or influencing control of C3is Inc.
C3is Inc. shareholder updates 5.02% ownership stake. Athanasios Tsiakmakis filed Amendment No. 1 to a Schedule 13G/A reporting beneficial ownership of 400,000 shares of C3is Inc. common stock, representing 5.02% of the class as of an event dated 01/09/2026. The percentage is based on 7,968,378 common shares issued and outstanding as of December 12, 2025, as reported by the company. He has sole voting and dispositive power over all 400,000 shares and no shared power. The filer certifies the shares were acquired and are held without the purpose or effect of changing or influencing control of C3is Inc.
Evergreen Capital Management LLC, a U.S.-based investment firm, reported a significant ownership position in C3is Inc. common stock. As of the event date, it beneficially owned 443,213 shares of C3is Inc., representing 9.99% of the outstanding common stock. Evergreen has sole power to vote and dispose of all 443,213 shares and no shared voting or dispositive power.
The filing is made on a Schedule 13G, which is used for passive investors. Evergreen certifies that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of C3is Inc.
C3is Inc. filed a post-effective amendment and preliminary prospectus covering the issuance of up to 3,177 common shares upon exercise of outstanding Class A warrants originally sold in a July 2023 public offering. Each Class A warrant is exercisable at $1,575.00 per share and will expire on July 5, 2028.
If all Class A warrants are exercised for cash, C3is estimates it would receive net proceeds of $5,003,775 and have 7,971,555 common shares outstanding as of September 30, 2025. The company plans to use any proceeds mainly for capital expenditures, including acquiring additional vessels that have not yet been identified, and for other general corporate purposes.
C3is, an emerging growth company incorporated in the Marshall Islands, owns a fleet of three drybulk carriers and one Aframax crude oil tanker with total capacity of 213,464 dwt. Its common stock trades on the Nasdaq Capital Market under the symbol CISS, and the last reported sale price on December 12, 2025 was $0.25 per share.
C3is Inc. filed a post-effective amendment to its Form F-1 to register the issuance of up to $7,200,427 of common shares issuable upon exercise of its outstanding Class B-1 and Class B-2 warrants. These warrants, issued in a January 2024 underwritten offering, each have an exercise price of $3.0391 per share and are currently exercisable for 52,511 and 2,316,754 common shares, respectively, through January 23, 2029.
If all Class B-1 and Class B-2 warrants are exercised for cash, C3is estimates it would receive net proceeds of approximately $159,580 and $7,040,847, and common shares outstanding would increase to 10,337,643. The company plans to use any cash proceeds for capital expenditures, including potential acquisitions of additional vessels, and for other general corporate purposes. C3is provides international seaborne transportation with three drybulk carriers and one Aframax crude oil tanker, with total carrying capacity of 213,464 dwt.
C3is Inc. has filed Post-Effective Amendment No. 5 to its Form F-1 to update its prospectus for the issuance of up to $7,363,308 of common shares upon exercise of outstanding Class C-1 and Class C-2 warrants. The prior underwritten equity offering tied to this registration is already completed, and this amendment now covers only the remaining warrants issued in that offering.
The Class C-1 warrants have an aggregate exercise price of $38,439 and are currently exercisable for 12,649 common shares, while the Class C-2 warrants have an aggregate exercise price of $7,324,869 and are exercisable for 2,410,210 shares, each at $3.0391 per share, expiring on March 19, 2029. If all these warrants are exercised for cash, C3is expects 10,391,237 common shares to be outstanding.
The company estimates that full cash exercise would provide approximately $7.36 million in gross proceeds, which it plans to use for capital expenditures, including potential vessel acquisitions it has not yet identified, and for general corporate purposes. C3is operates a fleet of three drybulk carriers and one Aframax crude oil tanker totaling 213,464 dwt and qualifies as an emerging growth company, allowing it to follow reduced reporting requirements for a limited period.
C3is Inc. completed a registered sale of 7,500,000 units, raising about $9.0 million in gross proceeds before fees and expenses.
The transaction included 1,700,000 common units, each with one common share plus Class D and Class E warrants, and 5,800,000 pre‑funded units that replace the share with a pre‑funded warrant exercisable at $0.00001 per share. Class D warrants are immediately exercisable at an initial price of $1.20, then automatically reset after a 10‑trading‑day period to an Adjustment Price tied to a floor of $0.344 based on the Nasdaq Minimum Price and the lowest volume‑weighted average prices, with proportional increases in underlying shares to keep aggregate exercise value unchanged. Class E warrants are immediately exercisable at $0.00001 per share with no expiration and initially no underlying shares, but after the adjustment period they provide additional shares so each holder’s total shares reflect the unit purchase price divided by the final Adjustment Price, minus shares already received.