SCHEDULE 13G Filed 2026-09-03 Event — SEC 0001235976-26-000001 →

HORNE TIMOTHY P → C3is Inc. CISS

Stake: — Shares: — Class: Common Stock, no par value

Item 4 — Purpose of Transaction

Not extracted from this filing — typically because it's an amendment (13D/A) and Item 4 is unchanged from the parent filing. Read the raw SEC filing →

Cross-References

Insider Activity (last 365d)

0 transactions

0 buys · 0 sales · 0 awards/exercises

Issuer Cluster

11 13D/G filings on this issuer

10 other filings besides this one

Filer Track Record

1 filings by this filer

0 other filings in the data moat

Short Interest · settle 2026-08-14

DTC 1.00

551,009 shares short · -80.8% vs prior

Other 13D/G Filings on C3is Inc.

Filed	Form	Filer	Stake	Shares
2026-08-28	SCHEDULE 13D/A	Imperial Petroleum Inc./Marshall Islands	80.50%	6,136,475	view →
2026-08-19	SCHEDULE 13G	JANE STREET GROUP, LLC	—	—	view →
2026-08-04	SCHEDULE 13G	Ascent Partners Fund LLC	—	—	view →
2026-07-30	SCHEDULE 13D/A	Imperial Petroleum Inc./Marshall Islands	68.80%	28,846,153	view →
2026-06-24	SCHEDULE 13D/A	Imperial Petroleum Inc./Marshall Islands	82.90%	7,171,543	view →
2026-05-18	SCHEDULE 13G	TOWERVIEW LLC	—	—	view →
2025-10-10	SCHEDULE	Imperial Petroleum Inc./Marshall Islands	68.80%	6,000,000	view →
2025-10-10	SCHEDULE	Flawless Management Inc.	3.70%	100,577	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 →

Want this depth on every filing the moment it hits SEC EDGAR?

Full feed access · API · daily intelligence brief · custom alerts. From $49/mo.

See pricing →