C3is Inc. (CISS) Institutional Ownership

Institutions by Trading Activity

-197,346Shares Outstanding

112,014Shares held by institutions

$170,261Value of institutional holdings

0.00%Institutional ownership %

735.77%Shares Changed QoQ

5No. of institutional investors

A total of 5 institutions have reported a stake in C3is Inc. (NASDAQ:CISS) as of December 2025, according to recent 13F filings with the SEC.

On a quarter-over-quarter basis, institutional holdings shifted by 735.77%, with a year-over-year a decrease of 37.50% in the count of filers.
Among the 5 institutional holders of C3is, 4 added to their stakes while 0 trimmed their positions and 1 held steady.
The aggregate institutional position in C3is now stands at 1.05Mn shares as of December 2025, after investors increased their holdings (up by 921.45K shares quarter on quarter which is up 602.29K shares year over year).
Among the most significant buyers of C3is during December 2025 were L1 Global Manager Pty Ltd (861.26K), CITADEL ADVISORS LLC (34.41K), Sassicaia Capital Advisers LLC (19.64K), UBS Group AG (6.13K).

112,014 Total Shares Held

Rows:

Owner Name	Date	Shares Held	Change (QoQ)	Change (%)	Value (USD)
L1 Global Manager Pty Ltd	31 Dec, 2025	861,260	861,260	0.00%	$198,090.00
WEXFORD CAPITAL LP	31 Dec, 2025	112,014	0	0.00%	$25,760.00
CITADEL ADVISORS LLC	31 Dec, 2025	47,635	34,414	260.30%	$10,956.00
Sassicaia Capital Advisers LLC	31 Dec, 2025	19,641	19,641	0.00%	$4,517.00
UBS Group AG	31 Dec, 2025	6,131	6,131	0.00%	$1,410.00