CISS SCHEDULE 13G/A: SEC filing

Timothy P. Horne

Filed with the SEC on Nov 12, 2026 · accession 0001235976-26-000002

CISS filed a SCHEDULE 13G/A (schedule 13g/a) with the SEC on Nov 12, 2026. A report the company filed with the SEC (the US market regulator). The stock moved -1.7% by the first close after the filing.

Summary of the filing

Timothy P. Horne filed an amended Schedule 13G/A reporting beneficial ownership of 27,000 shares (3.23%) of C3is Inc. common stock as of November 8, 2026, with no change from the prior filing.

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Key details

Shares beneficially owned$27K

IssuerC3is Inc.

Beneficial owner (filer)Timothy P. Horne

How CISS stock reacted

Close before

$1.78

Nov 11, 2026

First close after

-1.69%

$1.75

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 12, 2026?

CISS filed a SCHEDULE 13G/A (SEC filing). Timothy P. Horne filed an amended Schedule 13G/A reporting beneficial ownership of 27,000 shares (3.23%) of C3is Inc. common stock as of November 8, 2026, with no change from the prior filing.

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 $1.78 before the filing and $1.75 on Nov 12, 2026 (-1.69%).

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