C3is Inc. (CISS) - 13D/13G Filings

Real time Form 13D and 13G transaction reports:

  • Schedule 13D must be filed within ten days after a person or an organization acquires beneficial ownership of more than 5% of a voting class of a company's equity securities.
  • Due to inconsistent filing format, it is highly recommended that you read the orignal filing form.
  • Shares have beem adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Time period
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Reported
DateTime
Transaction
Date
TypeCompany
Symbol
Filed By
Symbol
Shares Owned
% Owned
Shares Vs. Prev ReportView
2026-09-03
10:06 am
Purchase
2026-08-2713GC3IS INC PAR $0.01 JULY 20
CISS
HORNE TIMOTHY P135,000
9.100%
135,000increase
(New Position)
Filing
History
2026-08-28
7:00 pm
Sale
2026-08-2613DC3IS INC PAR $0.01 JULY 20
CISS
Imperial Petroleum Inc.
IMPP
6,136,475
80.500%
-22,709,678decrease
(-78.73%)
Filing
History
2026-08-19
4:15 pm
Purchase
2026-08-1313GC3IS INC PAR $0.01 MARCH 2
CISS
JANE STREET GROUP, LLC937,330
7.200%
937,330increase
(New Position)
Filing
History
2026-08-14
4:10 pm
Purchase
2026-08-1413GC3IS INC PAR $0.01 MARCH 2
CISS
L1 Capital Global Opportunities Master Fund, Ltd.5,576
1.700%
5,497increase
(+6958.23%)
Filing
History
2026-08-14
08:00 am
Purchase
2026-08-1413GC3IS INC PAR $0.01 MARCH 2
CISS
S.H.N. Financial Investments Ltd.1,168
0.400%
1,089increase
(+1378.48%)
Filing
History
2026-08-04
8:47 pm
Purchase
2026-07-2813GC3IS INC PAR $0.01 MARCH 2
CISS
Ascent Partners Fund LLC40,264
9.990%
40,264increase
(New Position)
Filing
History
2026-08-03
4:19 pm
Purchase
2026-07-2813GC3IS INC PAR $0.01 MARCH 2
CISS
Alta Partners LLC29,208
8.200%
29,007increase
(+14431.34%)
Filing
History
2026-08-03
3:00 pm
Purchase
2026-07-2713GC3IS INC PAR $0.01 MARCH 2
CISS
CVI Investments, Inc.30,529
9.900%
30,529increase
(New Position)
Filing
History
2026-07-31
4:30 pm
Purchase
2026-06-2813GC3IS INC PAR $0.01 MARCH 2
CISS
Lind Global Fund III LP33,137
9.990%
33,137increase
(New Position)
Filing
History
2026-07-30
7:00 pm
Purchase
2026-07-2813DC3IS INC PAR $0.01 MARCH 2
CISS
Imperial Petroleum Inc.
IMPP
721,154
68.800%
541,865increase
(+302.23%)
Filing
History
2026-06-24
4:05 pm
Purchase
2026-06-2213DC3IS INC PAR $0.01 MARCH 2
CISS
Imperial Petroleum Inc.
IMPP
179,289
82.900%
54,422increase
(+43.58%)
Filing
History
2026-05-18
3:21 pm
Purchase
2026-05-1813GC3IS INC PAR $0.01 MARCH 2
CISS
TOWERVIEW LLC875
6.500%
875increase
(New Position)
Filing
History
2026-05-11
4:05 pm
Purchase
2026-03-3113GC3IS INC PAR $0.01 MARCH 2
CISS
Evergreen Capital Management LLC694
4.900%
615increase
(+778.48%)
Filing
History
2026-05-06
5:15 pm
Purchase
2026-05-0413DC3IS INC PAR $0.01 MARCH 2
CISS
Imperial Petroleum Inc.
IMPP
124,867
90.200%
89,462increase
(+252.68%)
Filing
History
2026-02-27
4:00 pm
Purchase
2026-02-2713GC3IS INC JAN 2026
CISS
Alta Partners LLC201
5.200%
201increase
(New Position)
Filing
History
2026-02-11
09:57 am
Purchase
2025-12-3113GC3IS INC JAN 2026
CISS
Ayrton Capital LLC3,058
9.990%
3,058increase
(New Position)
Filing
History
2026-02-04
5:00 pm
Purchase
2026-02-0213DC3IS INC JAN 2026
CISS
Imperial Petroleum Inc.
IMPP
35,405
81.900%
28,916increase
(+445.62%)
Filing
History
2026-01-14
1:55 pm
Unchanged
2025-12-1113GC3IS INC PAR $0.01 MARCH 2
CISS
Evergreen Capital Management LLC79
9.990%
0
(Unchanged)
Filing
History
2026-01-13
4:30 pm
Purchase
2026-01-0913GC3IS INC PAR $0.01 MARCH 2
CISS
Athanasios Tsiakmakis71
5.020%
43increase
(+153.57%)
Filing
History
2026-01-08
1:08 pm
Purchase
2025-12-1113GC3IS INC PAR $0.01 MARCH 2
CISS
Evergreen Capital Management LLC79
10.000%
79increase
(New Position)
Filing
History
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