C3is Inc. - Common Stock, par value $0.01 per share (CISS) Institutional Ownership

13F Institutional Holders and Ownership History from Q1 2025 to Q3 2025

Type / Class
Equity / Common Stock, par value $0.01 per share
Symbol
CISS on Nasdaq
Shares outstanding
7,968,127
Price per share
$1.72
All holders as of 30 Sep 2025
Q3 2025
Total 13F shares
127,735
Total reported value
$273,717
% of total 13F portfolios
0%
Share change
+90,334
Value change
+$173,762
Number of holders
3
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors

Significant Owners of C3is Inc. - Common Stock, par value $0.01 per share (CISS) based on Schedule 13D/G filings

Filer Ownership Change % Holdings Value Net Change Nb Shares Change % Reporting Name Report Period
Imperial Petroleum Inc./Marshall Islands 74% +21% $53,415,697 +$35,040,697 36,337,209 +191% Imperial Petroleum Inc. 29 Dec 2025
L1 Capital Global Opportunities Master Fund, Ltd. 10% $651,523 443,213 L1 Capital Global Opportunities Master Fund, Ltd. 11 Dec 2025
S.H.N. Financial Investments Ltd. 10% +243% $651,523 +$542,486 443,213 +498% S.H.N. Financial Investments Ltd. 11 Dec 2025
Evergreen Capital Management LLC/NV 10% $762,326 443,213 Evergreen Capital Management LLC/NV 11 Dec 2025
Athanasios Tsiakmakis 5% -67% $688,000 +$421,400 400,000 +158% Athanasios Tsiakmakis 09 Jan 2026
Flawless Management Inc. 3.7% -43% $229,316 100,577 0% Harry N. Vafias 09 Oct 2025
Pandora Consultants II SA 2.7% $97,917 42,946 Nikolaos Vafias 30 Sep 2025

As of 30 Sep 2025, 3 institutional investors reported holding 127,735 shares of C3is Inc. - Common Stock, par value $0.01 per share (CISS). This represents 1.6% of the company’s total 7,968,127 outstanding shares.

Institutional Holders of C3is Inc. - Common Stock, par value $0.01 per share (CISS) across Reporting Periods

Period Reported Shares, Excl. Options Value, Excl. Options Value Change Price (Median) Investors
2025 Q3 127,735 $273,717 +$173,762 $2.14 3
2025 Q2 37,401 $122,675 +$122,574 $3.28 4
2025 Q1 31 $20 +$20 $0.65 1