CISS SCHEDULE 13G/A: SEC filing

A Schedule 13G/A amendment was

Filed with the SEC on Aug 14, 2026 · accession 0001079973-26-001098

CISS filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Aug 14, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -3.1% by the first close after the filing.

Summary of the filing

A Schedule 13G/A amendment was filed regarding beneficial ownership of C3is Inc. (CISS) common stock, indicating a change in a passive institutional or large holder's position.

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Key details

IssuerC3is Inc.

How CISS stock reacted

Close before

$3.27

Aug 13, 2026

First close after

-3.06%

$3.17

5 trading days

-10.45%

$2.93

Since filing

-86.82%

$0.43

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Frequently asked questions

What did CISS file with the SEC on Aug 14, 2026?

CISS filed a SCHEDULE 13G/A (SEC filing). A Schedule 13G/A amendment was filed regarding beneficial ownership of C3is Inc. (CISS) common stock, indicating a change in a passive institutional or large holder's position.

How do I read a SCHEDULE 13G/A?

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 SCHEDULE 13G/A (schedule 13g/a): A report the company filed with the SEC (the US market regulator).

How did CISS stock react to this filing?

CISS closed at $3.27 before the filing and $3.17 on Aug 14, 2026 (-3.06%). Five trading days later: $2.93 (-10.45%).

Other CISS SEC filings

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