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SCHEDULE 13G Filed 2026-08-19 Event — SEC 0001595888-26-000109 →

JANE STREET GROUP, LLC → C3is Inc. CISS

Stake: — Shares: — Class: common stock, par value $0.01 per share

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
12 13D/G filings on this issuer
11 other filings besides this one
Filer Track Record
29 filings by this filer
28 other filings in the data moat
Short Interest · settle 2026-09-30
DTC 1.00
19,428 shares short · -6.4% vs prior

Other 13D/G Filings on C3is Inc.

FiledFormFilerStakeShares
2026-10-02 SCHEDULE 13G/A TOWERVIEW LLC — — view →
2026-09-03 SCHEDULE 13G HORNE TIMOTHY P — — view →
2026-08-28 SCHEDULE 13D/A Imperial Petroleum Inc./Marshall Islands 80.50% 6,136,475 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 →

Other Filings by JANE STREET GROUP, LLC

FiledFormIssuerStakeShares
2026-10-13 SCHEDULE 13G AETHLON MEDICAL INC — — view →
2026-10-08 SCHEDULE 13G Wheeler Real Estate Investment Trust, Inc. — — view →
2026-09-24 SCHEDULE 13G IP STRATEGY HOLDINGS, INC. — — view →
2026-09-18 SCHEDULE 13G Maison Solutions Inc. — — view →
2026-09-10 SCHEDULE 13G FOCUS UNIVERSAL INC. — — view →
2026-09-04 SCHEDULE 13G X-Energy, Inc. — — view →
2026-09-03 SCHEDULE 13G BIOVIE INC. — — view →
2026-08-21 SCHEDULE 13G CDT Environmental Technology Investment Holdings Ltd — — view →
2026-08-21 SCHEDULE 13G Neo-Concept International Group Holdings Ltd — — view →
2026-07-29 SCHEDULE 13G AEHR TEST SYSTEMS — — view →
2026-07-15 SCHEDULE 13G Agape ATP Corp — — view →
2026-07-13 SCHEDULE 13G ETSY INC — — view →
2026-07-02 SCHEDULE 13G HERTZ GLOBAL HOLDINGS, INC HTZWW — — view →
2026-07-02 SCHEDULE 13G CXApp Inc. CXAIW — — view →
2026-07-02 SCHEDULE 13G SUNation Energy, Inc. SUNE — — view →
2026-06-25 SCHEDULE 13G Leslie's, Inc. LESL — — view →
2026-06-24 SCHEDULE 13G Galaxy Digital Inc. GLXY — — view →
2026-06-24 SCHEDULE 13G Ascent Solar Technologies, Inc. ASTI — — view →
2026-06-23 SCHEDULE 13G Sleep Number Corp SNBRQ — — view →
2026-06-23 SCHEDULE 13G Jiuzi Holdings, Inc. JZXN — — view →
Showing 20 of 28

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