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CISS EFFECT: Shelf registration

C3is Inc.

Filed with the SEC on · accession 9999999995-26-003267

CISS filed a EFFECT (effect) with the SEC on Oct 16, 2026. C3is Inc. filed a Form EFFECT, indicating that a registration statement has been declared effective by the SEC. The stock moved -5.4% by the first close after the filing.

Summary of the filing

C3is Inc. filed a Form EFFECT, indicating that a registration statement has been declared effective by the SEC. This typically relates to a shelf registration or offering that is now cleared to proceed.

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Key details

RegistrantC3is Inc.

How CISS stock reacted

Close before

$0.56

Oct 15, 2026

First close after

-5.41%

$0.53

5 trading days

-7.20%

$0.52

Since filing

-32.07%

$0.38

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Frequently asked questions

What did CISS file with the SEC on Oct 16, 2026?

CISS filed a EFFECT (Shelf registration). C3is Inc. filed a Form EFFECT, indicating that a registration statement has been declared effective by the SEC. This typically relates to a shelf registration or offering that is now cleared to proceed.

What does a shelf registration mean for CISS stock?

New shares dilute existing holders and are often sold at a discount to the market price.

How do I read a EFFECT?

A report the company filed with the SEC (the US market regulator). Start with the summary, then the key amounts and names. Compare it with the company’s earlier filings.

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 EFFECT (effect): A report the company filed with the SEC (the US market regulator).

How did CISS stock react to this filing?

CISS closed at $0.56 before the filing and $0.53 on Oct 16, 2026 (-5.41%). Five trading days later: $0.52 (-7.20%).

Other CISS SEC filings

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