C3is effects 1-for-40 reverse stock split, shares trade split-adjusted on Nasdaq

• C3is executed a 1-for-40 reverse stock split effective 11:59 p.m. ET Aug. 18, 2026.
• Nasdaq trading shifted to a split-adjusted basis at the open on Aug. 19, 2026 under CISS.
• Outstanding common shares fell to about 1,440,000 from about 57,600,000; fractional shares were cashed out.
• Warrants and Series A Convertible Preferred Stock will be proportionately adjusted to reflect the reverse split.
• Post-split common stock has a new CUSIP: Y18284409.

Disclaimer: This news brief was created by Public Technologies (PUBT) using generative artificial intelligence. While PUBT strives to provide accurate and timely information, this AI-generated content is for informational purposes only and should not be interpreted as financial, investment, or legal advice. C3is Inc. published the original content used to generate this news brief via EDGAR, the Electronic Data Gathering, Analysis, and Retrieval system operated by the U.S. Securities and Exchange Commission (Ref. ID: 0001193125-26-356854), on August 19, 2026, and is solely responsible for the information contained therein.