SEC 13F Intelligence

C3IS INC

CUSIP Y18284169

C3is Inc has 5 institutional holders in Filings Flow’s 13F database, together reporting 1.05M shares worth $240,733 as of Q4 2025. The largest reported holders are L1 Global Manager Pty Ltd, Towerview LLC, and Wexford Capital LP.

Institutional Holders
5
Q4 2025
Reported Value
$240,733
Ticker
unmapped
private placement or foreign
Quarters Tracked
4

Ownership Trend

Institutional holders
Q1 ’25: 1Q1 ’25Q2 ’25: 5Q2 ’25Q3 ’25: 2Q3 ’25Q4 ’25: 5Q4 ’25filingsflow.com
Total reported value
Q1 ’25: $20Q1 ’25Q2 ’25: $122,675Q2 ’25Q3 ’25: $268,717Q3 ’25Q4 ’25: $240,733Q4 ’25filingsflow.com

Holders

··Mixed quarters
Manager% of PortfolioValueSharesQuarter
L1 Global Manager Pty Ltd$149M AUM0.13%$198,090861.3KQ4 2025
TOWERVIEW LLC$155M AUM0.03%$46,89414.3KQ2 2025OLDER
WEXFORD CAPITAL LP$690M AUM0.00%$25,760112.0KQ4 2025
CITADEL ADVISORS LLC$618.5B AUM0.00%$10,95647.6KQ4 2025
Sassicaia Capital Advisers LLC$89M AUM0.01%$4,51719.6KQ4 2025
UBS Group AG$666.3B AUM0.00%$1,4106.1KQ4 2025
SBI Securities Co., Ltd.$3.6B AUM0.00%$134Q2 2025OLDER
CONCOURSE FINANCIAL GROUP SECURITIES, INC.$0 AUM$00Q2 2025OLDER

Holdings are reported up to 45 days after quarter end. Share counts are as filed and not adjusted for stock splits.