C3IS INC

Historical 13F Holders

Symbol: CISS
CUSIP: Y18284177
All holders as of: Q1 2026
Type: Equity
Class: COM NEW

Reported Value, Excluding Options

Total Shares Held, Excluding Options

Total Filers

13D/G Filers

Each filer's latest filing for Y18284177 since 12/18/2024, largest first.

Filer	% of Class	Shares	Form	Filed
Imperial Petroleum Inc./Marshall Islands 13D/A	81.9%	9,913,422	13D/A	2/4/2026 Event 2/2/2026
Ayrton Capital LLC 13G	10.0%	856,228	13G	2/11/2026 Event 12/31/2025
Ayrton Capital LLC	10.0%	856,228
Alto Opportunity Master Fund, SPC - Segregated Master Portfolio B	10.0%	856,228
Waqas Khatri	10.0%	856,228
Under 5%, checked the "5 percent or less" box, or amended by a later filing (1)
Alta Partners LLC 13G Amended under CUSIP Y18284409 on 10/5/2026	5.2%	56,176	13G	2/27/2026 Event 2/27/2026

13F Holders by Quarter

Period	Filers	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q1	3	88.5 k	$72.9 k	$0