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CISS 424B3: Stock split

C3is Inc.

Filed with the SEC on · accession 0001193125-26-448811

CISS filed a 424B3 (prospectus (offering)) with the SEC on Nov 5, 2026. The final terms of an offering of shares or bonds. The stock moved -22.1% by the first close after the filing.

Summary of the filing

C3is Inc. announced a one-for-five reverse stock split of its common stock, effective November 8, 2026, with trading on a split-adjusted basis beginning November 9, 2026, primarily to regain compliance with Nasdaq's minimum bid price requirement.

For details, click here →How to read a 424B3 →

Key details

IssuerC3is Inc.
ExchangeNasdaq Capital Market
Chief financial officerNina Pyndiah

How CISS stock reacted

Close before

$0.49

Nov 4, 2026

First close after

-22.07%

$0.38

5 trading days

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Since filing

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Frequently asked questions

What did CISS file with the SEC on Nov 5, 2026?

CISS filed a 424B3 (Stock split). C3is Inc. announced a one-for-five reverse stock split of its common stock, effective November 8, 2026, with trading on a split-adjusted basis beginning November 9, 2026, primarily to regain compliance with Nasdaq's minimum bid price requirement.

What does a stock split mean for CISS stock?

Usually: fewer shares means each remaining share owns more of the company. It matters whether the company actually buys and at what price.

How do I read a 424B3?

The final terms of an offering of shares or bonds. Look at price, number of shares and the discount to the market price. Large offerings dilute existing shareholders.

Why are SEC filings important?

Public companies must tell the SEC about anything that can change their value — results, leadership changes, big deals, new shares, bankruptcy. Filings are the official source, often before the news. A 424B3 (prospectus (offering)): The final terms of an offering of shares or bonds.

How did CISS stock react to this filing?

CISS closed at $0.49 before the filing and $0.38 on Nov 5, 2026 (-22.07%).

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