C3is Inc (CISS)

CUSIP: Y18284169 | Industrials · Marine Shipping | Micro Cap | 9 institutional holders

Compare Detailed Historical Funds Options Short Interest 13D/13G Peers Targeting Trading Summary Profile

Beneficial Ownership — 13D / 13G

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

Holder	Shares	% of Class	Change	Event Date	vs 13F
13G/AL1 Capital Global Opportunities Master Fund, Ltd.	223,038	1.7%	Newly reported	Aug 14, 2026	No 13F filer matched
13G/AS.H.N. Financial Investments Ltd.	46,719	0.4%	Newly reported	Aug 14, 2026

Institutional Holders — Q4 2025

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L1 Global Manager Pty Ltd861,260

0.1% of portfolio$198.1K

Wexford Capital LP112,014

0.0% of portfolio$25.8K

Citadel Advisors LLC47,635

0.0% of portfolio$11.0K

Sassicaia Capital Advisers LLC19,641

0.0% of portfolio$4.5K

UBS Group AG6,131

0.0% of portfolio$1.4K

				Style	Turnover	Location	Filed
L1 Global Manager Pty Ltd	861,260	$198.1K	0.1%	GARP	Very High	Melbourne, China	2026-02-13
Wexford Capital LP	112,014	$25.8K	0.0%	Yield	Very High	West Palm Beach, FL	2026-02-13
Citadel Advisors LLC	47,635	$11.0K	0.0%	Core	Very High	Miami, FL	2026-02-17
Sassicaia Capital Advisers LLC	19,641	$4.5K	0.0%	Agg Growth	Very High	Jericho, NY	2026-02-13
UBS Group AG	6,131	$1.4K	0.0%	Core	Medium	Zurich, Switzerland	2026-01-29

13G/AL1 Capital Global Opportunities Master Fund, Ltd.223,038

1.7% of class · Aug 14, 2026Newly reported

No 13F filer matched

13G/AS.H.N. Financial Investments Ltd.46,719

0.4% of class · Aug 14, 2026Newly reported

No 13F filer matched

13D/AImperial Petroleum Inc.36,337,209

74.0% of class · Dec 29, 2025+23,837,209

No 13F filer matched

13D/AHarry N. Vafias100,577

3.7% of class · Oct 9, 2025Unchanged

with Arethusa Properties LTD, Flawless Management Inc.

No 13F filer matched