C3IS INC

Historical 13F Holders

Symbol
CISS
CUSIP
Y18284300
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for Y18284300 since 12/18/2024, newest first.

Filer % of Class Filed
Ascent Partners Fund LLC 13G/A Amendment 1
0% 10/5/2026
Event 10/1/2026
Towerview LLC 13G/A Amendment 1
Checked 5% or less
10/2/2026
Event 8/19/2026
Jane Street Group, LLC 13G
7.2% 8/19/2026
Event 8/13/2026
Ascent Partners Fund LLC 13G
10.0% 8/4/2026
Event 7/28/2026
CVI Investments, Inc. 13G
9.9% 8/3/2026
Event 7/27/2026
Alta Partners LLC 13G/A Amendment 1 8.2% 8/3/2026
Event 7/28/2026
Lind Global Fund III LP 13G
10.0% 7/31/2026
Event 6/28/2026
Imperial Petroleum Inc./Marshall Islands 13D/A Amendment 12 68.8% 7/30/2026
Event 7/28/2026
Imperial Petroleum Inc./Marshall Islands 13D/A Amendment 11 82.9% 6/24/2026
Event 6/22/2026
Towerview LLC 13G 6.5% 5/18/2026
Event 5/18/2026
Evergreen Capital Management LLC/NV 13G/A Amendment 2 4.9% 5/11/2026
Event 3/31/2026
Imperial Petroleum Inc./Marshall Islands 13D/A Amendment 10 90.2% 5/6/2026
Event 5/4/2026

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q2 3 74.5 k $123 k