Companies: 10,795·Total market cap: $144.5T
C3is Inc.

C3is Inc.

CISSNASDAQIndustrials● Active
$2.12
$-0.02(-0.93%)
Market Cap$374029
P/E Ratio—
52W High$831.6
52W Low$1.9
SEC Filings
Foreign Private Issuer · Files 20-F / 6-K

C3is Inc. (CISS) SEC Filings & 10-K Annual Reports

SEC EDGAR regulatory submissions (10-K, 10-Q, 8-K), latest forms, and full filing history — quick links to financials and earnings below.

SEC EDGAR · data.sec.gov · CIK 0001951067 · CISS · NASDAQ · as of Jun 9, 2026

Filing snapshot

260
Total Filings
424B3
Latest Form
2026-05-18
Most Recent
2023
Filing Since
FinancialsEarningsView All on EDGAR

Source: SEC EDGAR (data.sec.gov) · CIK 0001951067 · Updated hourly · Not investment advice

Latest Annual Report

20-F · Annual Report (Foreign Issuer)FY
Filed Date
2026-04-22
Fiscal Year End
Apr 22, 2026
Accession No.
0001193125-26-170448
Primary Document
d108558d20f.htm
View on SEC EDGARDownload PDFFiling Index
Source: data.sec.gov · CIK 0001951067 · Accession 0001193125-26-170448

Latest Key Filings

6-KQuarterly Report
6-K
2026-05-18
View 6-K on SEC
8-KCurrent Report

No recent filings

Form 4Insider Activity
Ownership Change Disclosures

Executive & director trade disclosures. Full buy/sell sentiment analysis on the dedicated tab.

View Insider Trades Tab

SEC Filing History

Hide Form 4 / 144
424B3424B3
424B3
2026-05-18
View
424B3424B3
424B3
2026-05-18
View
424B3424B3
424B3
2026-05-18
View
424B3424B3
424B3
2026-05-18
View
6-KCurrent Report (Foreign Issuer)
6-K
2026-05-18
View
SCHEDULE 13GSCHEDULE 13G
SCHEDULE 13G
2026-05-18
View
EFFECTEFFECT
EFFECT
2026-05-13
View
EFFECTEFFECT
EFFECT
2026-05-13
View
EFFECTEFFECT
EFFECT
2026-05-13
View
EFFECTEFFECT
EFFECT
2026-05-13
View
SCHEDULE 13G/ASCHEDULE 13G/A
SCHEDULE 13G/A
2026-05-11
View
SCHEDULE 13D/ASCHEDULE 13D/A
SCHEDULE 13D/A
2026-05-06
View
POS AMPOS AM
POS AM
2026-05-05
View
POS AMPOS AM
POS AM
2026-05-05
View
POS AMPOS AM
POS AM
2026-05-05
View
Showing 1–15 of 260 filingsForm 4 / 144 hidden

About SEC Filings & 10-K Annual Reports

Data source: SEC EDGAR (data.sec.gov)  |  Updated: Hourly  |  CIK: 0001951067  |  Exchange: NASDAQ · Industrials

C3is Inc. (NASDAQ: CISS) has submitted 260 documents to the U.S. Securities and Exchange Commission (SEC) since its IPO in 2023. As a Industrials sector company with CIK 0001951067, all filings are publicly accessible via the EDGAR database at no cost.

The annual 10-K report is C3is Inc.'s most comprehensive regulatory disclosure. The most recent C3is Inc. 10-K was filed on 2026-04-22 for fiscal year ending 2026. Historical CISS 10-K annual reports are available from 2022 through 2026.

Investors researching C3is Inc. SEC filings can access 10-K annual reports, quarterly 10-Q reports, material event 8-K filings, and proxy statements directly from the links above. All documents are sourced from the official SEC EDGAR system.

Source: SEC EDGAR · data.sec.gov · SEC Form 10-K · SEC Form 10-Q · SEC Form 8-K2026-06-09
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Frequently Asked Questions

CISS SEC Filings · 8 questions

C3is Inc. (CISS) SEC filings are publicly available on this page and on the official SEC EDGAR database at sec.gov. You can browse all 260 filings and access original documents at no cost. C3is Inc.'s CIK is 0001951067.

CISS SEC filingsC3is Inc. SEC documentsfind CISS 10-K