CISS 424B3: SEC filing
C3is Inc.
Filed with the SEC on · accession 0001193125-26-369646
CISS filed a 424B3 (prospectus (offering)) with the SEC on Aug 27, 2026. The final terms of an offering of shares or bonds. The stock moved -27.3% by the first close after the filing.
Summary of the filing
C3is Inc. filed a Prospectus Supplement No. 4 to its registration statement, incorporating a Form 6-K that reports unaudited financial results for Q2 and six months ended June 30, 2026, including operational highlights and share count updates.
Key details
How CISS stock reacted
Close before
$2.93
Aug 26, 2026
First close after
-27.30%
$2.13
5 trading days
-52.22%
$1.40
Since filing
-86.94%
$0.38
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Click hereFrequently asked questions
What did CISS file with the SEC on Aug 27, 2026?
CISS filed a 424B3 (SEC filing). C3is Inc. filed a Prospectus Supplement No. 4 to its registration statement, incorporating a Form 6-K that reports unaudited financial results for Q2 and six months ended June 30, 2026, including operational highlights and share count updates.
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 $2.93 before the filing and $2.13 on Aug 27, 2026 (-27.30%). Five trading days later: $1.40 (-52.22%).
Other CISS SEC filings
- 424B3 · Stock splitNov 5, 2026
- 6-K · Stock splitNov 5, 2026
- 424B3 · Stock splitNov 5, 2026
- 424B3 · Stock splitNov 5, 2026
- EFFECT · Shelf registrationOct 16, 2026
- EFFECT · Shelf registrationOct 16, 2026
- EFFECT · Shelf registrationOct 16, 2026
- 6-K · SEC filingSep 29, 2026
- 424B3 · SEC filingAug 27, 2026
- 6-K · SEC filingAug 27, 2026
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