C3is Inc. - Common Stock, par value $0.01 per share (CISS) Institutional Ownership

13F Institutional Holders and Ownership History

Type / Class
Equity / Common Stock, par value $0.01 per share
Symbol
CISS on Nasdaq
Shares outstanding
1,080,308
Price per share
$1.44

Significant Owners of C3is Inc. - Common Stock, par value $0.01 per share (CISS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Imperial Petroleum Inc./Marshall Islands 82% 9,913,422 Imperial Petroleum Inc. 02 Feb 2026
Ayrton Capital LLC 10% 856,228 Ayrton Capital LLC 31 Dec 2025
Alta Partners LLC 5.2% $80,893 56,176 Alta Partners LLC 27 Feb 2026