C3is Inc. details reverse split and vote results

C3is Inc. held its 2026 Annual Meeting of Stockholders, where Harry N. Vafias and George Xiradakis were re-elected as Class III directors for three-year terms expiring at the 2029 annual meeting.

Rhea-AI Filing Summary

C3is Inc. held its 2026 Annual Meeting of Stockholders, where Harry N. Vafias and George Xiradakis were re-elected as Class III directors for three-year terms expiring at the 2029 annual meeting. Stockholders also ratified Deloitte Certified Public Accountants, S.A. as independent auditors.

Stockholders approved amendments to the Restated Articles of Incorporation permitting one or more reverse stock splits of the common stock, at ratios from one-for-two up to one-for-1,000, with each such reverse split to be effected within three years at the Board’s discretion. Separately, on April 26, 2026 the company effected a one-for-seven reverse stock split, reducing outstanding common shares from approximately 3.8 million to approximately 541,082. No fractional shares were issued; instead, cash was paid in lieu of fractional shares. The par value and other terms of the common shares were unchanged. All share and earnings per share data for the three fiscal years ended December 31, 2025 have been retroactively adjusted, and an aggregate par value reduction of $5,655 was reclassified from capital stock to additional paid-in capital.

Key Figures

Executed reverse split ratio: 1-for-7 Shares outstanding before split: approximately 3.8 million shares Shares outstanding after split: approximately 541,082 shares +5 more

8 metrics

Executed reverse split ratio 1-for-7 Reverse stock split of common shares effective April 26, 2026

Shares outstanding before split approximately 3.8 million shares Common shares outstanding before 1-for-7 reverse stock split

Shares outstanding after split approximately 541,082 shares Common shares outstanding after 1-for-7 reverse stock split

Par value reclassification $5,655 Aggregate par value reduction moved from Capital stock to Additional paid-in capital

2025 basic EPS (post-adjustment) $325.49 Basic earnings per share of common stock for year ended December 31, 2025

2025 diluted EPS (post-adjustment) $27.84 Diluted earnings per share of common stock for year ended December 31, 2025

Reverse split authorization range 1-for-2 to 1-for-1,000 Ratified amendments allow future reverse stock splits within this ratio range

Authorization window three years Each approved future reverse stock split must be effected within three years of approval

Key Terms

reverse stock split, Additional paid-in capital, basic earnings/(loss) per share of common stock, diluted earnings/(loss) per share of common stock, +2 more

6 terms

reverse stock split financial

"effect one or more reverse stock splits of our issued and outstanding shares"

A reverse stock split reduces a company's number of outstanding shares while raising the price per share proportionally, so the total value of each investor's holding is unchanged; a 1-for-10 split turns 100 shares worth $1 each into 10 shares worth $10 each. Companies often do this to regain compliance with an exchange's minimum price rule or to attract investors who avoid very low-priced stocks.

Additional paid-in capital financial

"a corresponding increase in “Additional paid-in capital” on the Company’s balance sheet"

Amount of money shareholders have paid to a company for shares that is above the stock’s nominal or par value; think of it as the extra premium paid when a group buys a ticket that has a low listed price. It matters to investors because it represents permanent capital on the balance sheet that can cushion losses, affect book value per share and indicate how much fresh cash equity holders have contributed beyond the minimum share value.

basic earnings/(loss) per share of common stock financial

"Basic earnings/(loss) per share of common stock | | $ | 325.49"

diluted earnings/(loss) per share of common stock financial

"Diluted earnings/(loss) per share of common stock | | $ | 27.84"

Basic weighted average number of shares financial

"Basic weighted average number of shares | | | 12,852"

Diluted weighted average number of shares financial

"Diluted weighted average number of shares | | | 50,007"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did C3is Inc. (CISS) stockholders approve at the 2026 Annual Meeting?

Stockholders re-elected Harry N. Vafias and George Xiradakis as Class III directors through 2029, ratified Deloitte Certified Public Accountants, S.A. as independent auditors, and approved amendments allowing one or more reverse stock splits between 1-for-2 and 1-for-1,000 within three years.

What reverse stock split did C3is Inc. (CISS) implement in 2026?

On April 26, 2026, C3is Inc. implemented a 1-for-7 reverse stock split of its common shares. The split affected all issued and outstanding common shares and was accompanied by cash payments in lieu of any resulting fractional shares.

How did the 1-for-7 reverse split affect C3is Inc. (CISS) share count?

The 1-for-7 reverse stock split reduced C3is Inc.’s outstanding common shares from approximately 3.8 million to approximately 541,082. No fractional shares were issued; holders who would have held fractions instead received cash payments in lieu of those fractions.

How were C3is Inc. (CISS) earnings per share figures adjusted after the reverse split?

All per-share data for the three years ended December 31, 2025 were retroactively adjusted. For 2025, basic earnings per share became $325.49 and diluted earnings per share $27.84, reflecting the reduced share count following the 1-for-7 reverse stock split.

What balance sheet reclassification resulted from the C3is Inc. (CISS) reverse split?

The reverse split led to an incremental reduction in aggregate par value of $5,655. This amount was recorded as a reduction to Capital stock and a corresponding increase in Additional paid-in capital on C3is Inc.’s balance sheet, with no change to individual share par value.

What flexibility does C3is Inc. (CISS) now have for future reverse splits?

Stockholders authorized amendments allowing the board to effect one or more reverse stock splits of common stock at ratios from 1-for-2 up to 1-for-1,000, in the aggregate not more than 1-for-1,000, provided each reverse split is carried out within three years of approval.

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Accepted by SEC EDGAR 07/22/2026 - 05:01 PM Learn about SEC filing dates

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER

PURSUANT TO RULE 13a-16 OR 15d-16

UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of July 2026

Commission File Number 001-41717

C3IS INC.

(Translation of registrant’s name into English)

331 Kifissias Avenue Kifissia 14561 Athens, Greece

(Address of principal executive office)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒   Form 40-F ☐

INFORMATION CONTAINED IN THIS FORM 6-K REPORT

2026 Annual Meeting of Stockholders

On July 17, 2026, C3is Inc. (the “Company”) held its 2026 Annual Meeting of Stockholders (the “Annual Meeting”). At the Annual Meeting, Mr. Harry N. Vafias and Mr. George Xiradakis were each re-elected as a Class III director for a three-year term expiring at the annual meeting of our stockholders in 2029. Our stockholders also ratified the appointment of Deloitte Certified Public Accountants, S.A. as our independent auditors and approved one or more amendments to our Restated Articles of Incorporation, as amended, to effect one or more reverse stock splits of our issued and outstanding shares of common stock, at a ratio of not less than one-for-two and not more than one-for-1,000 and in the aggregate of not more than one-for-1,000, inclusive, with the exact ratio to be determined by our Board of Directors in its discretion; provided each such reverse stock split is effected within three years of such approval.

EXHIBIT INDEX

99.1 EPS Disclosure.

*****

This report on Form 6-K is hereby incorporated by reference into the Company’s Registration Statement on Form S-8 (Reg. No. 333-273306) filed with the Securities and Exchange Commission on July 18, 2023 and Registration Statement on Form F-3 (Reg. No. 333- 285135) filed with the Securities and Exchange Commission on February 21, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: July 22, 2026

C3IS INC.
By:		/s/ Nina Pyndiah
Name:		Nina Pyndiah
Title:		Chief Financial Officer

EXHIBIT 99.1

REVERSE STOCK SPLIT DISCLOSURE

On April 26, 2026, C3is Inc. (the “Company”) effected a one-for-seven (1-for-7) reverse split of its common shares (“Common Shares”). The reverse stock split reduced the number of the Company’s outstanding Common Shares from approximately 3.8 million shares to approximately 541,082 shares and affected all issued and outstanding Common Shares. No fractional shares were issued in connection to the reverse split. Stockholders who would otherwise hold a fractional share of the Company’s Common Shares received a cash payment in lieu of such fractional share. The par value and other terms of the Company’s Common Shares were not affected by the reverse stock split.

All share and earnings per share information have been retroactively adjusted to reflect the stock split and the incremental reduction in the aggregate par value of all issued and outstanding Common Shares of $5,655 has been reflected as a reduction to “Capital stock” and a corresponding increase in “Additional paid-in capital” on the Company’s balance sheet. The effect of the reverse stock split on per share amounts and weighted average number of Common Shares outstanding for each of the three fiscal years ended December 31, 2025 are as follows.

		Year Ended December 31,
		2025				2024				2023
Basic earnings/(loss) per share of common stock		$	325.49			$	(2,460.12	)		$	335,222.19
Diluted earnings/(loss) per share of common stock		$	27.84			$	(2,460.12	)		$	133,916.72
Basic weighted average number of shares			12,852				3,288				25
Diluted weighted average number of shares			50,007				3,288				69

Filing Exhibits & Attachments

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• EX-99.1 EX-99.1 6.8 KB