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ISSUER PROFILE · CIK 0001951067 · CUSIP Y18284169

C3is Inc.CISS

5 13D/G filings 3 distinct filers 0 insider transactions (365d)

Post-Filing Returns · across 4 activist filings on this issuer

Median 30d
avg —
Median 60d
avg —
Median 90d
avg —
Median 180d
avg —

Returns measured from each activist filing's date_of_event, split + dividend adjusted via Yahoo Finance.

Cross-Reference Snapshot

Activist filings
5
1 SCHEDULE 13G · 4 SCHEDULE
Distinct filers
3
multi-activist cluster
Insiders (365d)
0
0 buys · 0 sales
Latest short DTC
1.00
as of 2026-05-29

13D/G Filings Timeline · 5 total

FiledFormFilerStakeSharesIntent
2026-05-18 SCHEDULE 13G TOWERVIEW LLC view →
2025-10-10 SCHEDULE Flawless Management Inc. 3.70% 100,577 view →
2025-10-10 SCHEDULE Imperial Petroleum Inc./Marshall Islands 68.80% 6,000,000 view →
2025-10-01 SCHEDULE Flawless Management Inc. 6.30% 100,577 view →
2025-01-14 SCHEDULE Imperial Petroleum Inc./Marshall Islands 73.10% 11,532,251 view →

FINRA Short Interest History

SettlementShort InterestDays to Cover% Δ vs prior
2026-05-29 48,614 1.00 -53.3%
2026-05-15 104,053 3.08 +22.4%
2026-04-30 84,980 1.11 +699.4%
2026-04-15 10,631 1.00 -81.8%
2026-03-31 58,387 1.00 -3.7%
2026-03-13 60,614 1.00 -75.9%
2026-02-27 251,601 1.00 -7.5%
2026-02-13 271,959 1.00 +56.0%
2026-01-30 174,310 1.00 +187.7%
2026-01-15 60,586 1.00 -66.3%
2025-12-31 179,803 1.00 -57.9%
2025-12-15 427,225 1.00 +486.5%

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