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Security

C3is Inc. Common Stock · CISS

CISSNASDAQCommon stockCurrentCIK 1951067Updated Oct 4, 2026

Company: C3is Inc. →

CISS price & chart

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About the company

We are a provider of international seaborne transportation services to drybulk charterers, including major national and private industrial users, commodity producers and traders. As of the date of this prospectus, we own and operate a fleet of five vessels, comprising three drybulk carriers that transport major bulks such as iron ore, coal and grains, and minor bulks such as bauxite, phosphate and fertilizers, an Aframax crude oil tanker that transports crude oil and a product tanker that transports refined petroleum products. The total cargo carrying capacity of our fleet is 260,671 dwt. On a pro forma basis following the delivery of one additional MR product tanker that we have agreed to acquire, with expected delivery in the third quarter of 2026, our fleet will consist of six vessels: three Handysize dry bulk carriers, one Aframax tanker, and two MR product tankers, with a total carrying capacity of approximately 311,431 dwt.

424B4 · 2026-07-28 · 0001193125-26-318972

Company description from the cited filing.

In the news

No coverage from other publishers is available.

Seeking Alpha
SEC disclosures

Recent filings

  1. SCHEDULE 13G/A - filed by TOWERVIEW LLC regarding C3is Inc.

    SCHEDULE 13G/A · 2026-10-02 · 0001166573-26-000003

  2. 6-K filing

    6-K · 2026-09-29 · 0001193125-26-405908

  3. 424B3 filing

    424B3 · 2026-08-27 · 0001193125-26-369646

  4. 424B3 filing

    424B3 · 2026-08-27 · 0001193125-26-369643

  5. 424B3 filing

    424B3 · 2026-08-27 · 0001193125-26-369642

Show 5 more recent filings
  1. 424B3 filing

    424B3 · 2026-08-27 · 0001193125-26-369641

  2. 424B3 filing

    424B3 · 2026-08-27 · 0001193125-26-369639

  3. 6-K filing

    6-K · 2026-08-27 · 0001193125-26-369519

  4. 424B3 filing

    424B3 · 2026-08-19 · 0001193125-26-357115

  5. 424B3 filing

    424B3 · 2026-08-19 · 0001193125-26-357102

Financials

FY 2025 · USD
Revenue34,755,612USD · FY 2025
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

Net income10,473,210USD · FY 2025
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

Operating income1,364,430USD · FY 2025
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

Diluted EPS3.98USD per share · FY 2025
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

Some figures are unavailable for this reporting year.

balance sheet · annual statements
Line itemFY 2025FY 2024FY 2023FY 2022
ASSETS
AssetsUSD98,486,630
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

100,489,163
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

95,472,015
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

39,859,671
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Property, Plant and Equipment, NetUSD77,647,921
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

84,149,805
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

75,161,431
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

38,836,151
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Current assets:
Cash and Cash Equivalents, at Carrying ValueUSD616,640
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

4,640,343
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

695,288
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

—
Inventory, NetUSD1,312,062
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

884,148
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

689,269
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

165,645
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Assets, CurrentUSD20,838,709
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

16,339,358
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

20,310,584
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

1,023,520
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Prepaid Expense and Other Assets, CurrentUSD15,378
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

21,951
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

80,267
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

36,340
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

LIABILITIES AND EQUITY
LiabilitiesUSD3,387,016
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

29,127,908
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

39,928,166
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

965,466
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Stockholders’ equity:
Common Stock, Value, IssuedUSD6,597
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

7,065
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

874
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

—
Additional Paid in CapitalUSD90,601,172
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

71,091,138
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

47,191,056
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

—
Retained Earnings (Accumulated Deficit)USD4,485,845
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

257,052
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

8,345,919
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

—
Stockholders' Equity Attributable to ParentUSD95,099,614
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

71,361,255
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

55,543,849
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

38,894,205
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Liabilities and EquityUSD98,486,630
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

100,489,163
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

95,472,015
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

39,859,671
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Current liabilities:
Liabilities, CurrentUSD3,357,855
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

18,690,874
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

39,928,166
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

965,466
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Operating Lease, Liability, CurrentUSD24,751
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

28,768
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

——
Additional Financial Items
Accrued Liabilities, CurrentUSD911,201
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

1,272,095
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

634,297
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

173,324
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Dividends PayableUSD354,167
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

———

Lines labelled “Derived” are calculated from reported figures.

cash flow · annual statements
Line itemFY 2025FY 2024FY 2023FY 2022
Cash flows from operating activities:
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based Payment Arrangement, Noncash ExpenseUSD375,224
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

337,855
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

37,638
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Changes in operating assets and liabilities:
Increase (Decrease) in Accounts ReceivableUSD1,447,445
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-7,628,055
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

9,768,670
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Increase (Decrease) in InventoriesUSD427,914
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

194,879
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

523,624
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Net Cash Provided by (Used in) Operating ActivitiesUSD4,001,822
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

24,976,137
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

5,639,144
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing ActivitiesUSD-6,537,193
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-1,360,335
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

-12,426,450
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Payments to Acquire Property, Plant, and EquipmentUSD161,900
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

1,623,125
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

4,300,000
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing ActivitiesUSD-1,488,332
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-19,670,747
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

7,482,594
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate EffectUSD-4,023,703
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

3,945,055
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

695,288
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Cash, Cash Equivalents, Restricted Cash and Restricted Cash EquivalentsUSD616,640
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

4,640,343
Source

20-F · 2025-04-28 · 0001193125-25-100539

As of 2024-12-31

695,288
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2023-12-31

0
Source

20-F · 2024-04-30 · 0001193125-24-123906

As of 2022-12-31

Supplemental disclosure of cash flow information:
Interest Paid, Excluding Capitalized Interest, Operating ActivitiesUSD1,190,000
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

———
Additional Financial Items
DepreciationUSD6,501,884
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

6,177,651
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

4,104,720
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Dividends PayableUSD354,167
Source

20-F · 2026-04-22 · 0001193125-26-170448

As of 2025-12-31

———
Foreign Currency Transaction Gain (Loss), before TaxUSD-63,677
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-160,262
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

195,675
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Foreign Currency Transaction Gain (Loss), UnrealizedUSD0
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-156,921
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

241,967
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Investment Income, InterestUSD327,840
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

950,816
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

36,107
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Net Income (Loss) Attributable to ParentUSD10,473,210
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-2,748,367
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

9,291,912
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Net Income (Loss) Available to Common Stockholders, BasicUSD4,183,254
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-8,088,867
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

8,527,420
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Nonoperating Income (Expense)USD9,108,780
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-12,810,333
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

-1,136,049
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Operating ExpensesUSD33,391,182
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

32,234,135
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

18,311,021
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Proceeds from Contributions from ParentUSD0
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

—3,305,083
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—
Revenue from Contract with Customer, Including Assessed TaxUSD34,755,612
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

42,296,101
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

28,738,982
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

—

Lines labelled “Derived” are calculated from reported figures.

income statement · annual statements
Line itemFY 2025FY 2024FY 2023
Total RevenueUSD34,755,612
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

42,296,101
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

28,738,982
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Operating Income (Loss)USD1,364,430
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

10,061,966
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

10,427,961
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Net Income (Loss) Attributable to ParentUSD10,473,210
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-2,748,367
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

9,291,912
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Earnings Per Share, BasicUSD per share46.5
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-25.73
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

157.28
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Earnings Per Share, DilutedUSD per share3.98
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-25.73
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

63.08
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Weighted Average Number of Shares Outstanding, Basicshares89,967
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

314,341
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

54,217
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Weighted Average Number of Shares Outstanding, Dilutedshares350,055
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

314,341
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

146,116
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Additional Financial Items
Cost of Property Repairs and MaintenanceUSD1,057,577
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

949,259
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

417,680
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Foreign Currency Transaction Gain (Loss), before TaxUSD-63,677
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-160,262
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

195,675
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Investment Income, InterestUSD327,840
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

950,816
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

36,107
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Net Income (Loss) Available to Common Stockholders, BasicUSD4,183,254
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-8,088,867
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

8,527,420
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Nonoperating Income (Expense)USD9,108,780
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

-12,810,333
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

-1,136,049
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Operating ExpensesUSD33,391,182
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

32,234,135
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

18,311,021
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Preferred Stock, Dividends Per Share, DeclaredUSD per share1.27
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

0.63
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

0.67
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Revenue from Contract with Customer, Including Assessed TaxUSD34,755,612
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

42,296,101
Source

20-F · 2025-04-28 · 0001193125-25-100539

2024-01-01 to 2024-12-31

28,738,982
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Undistributed Earnings (Loss) Allocated to Participating Securities, BasicUSD-45,539
Source

20-F · 2026-04-22 · 0001193125-26-170448

2025-01-01 to 2025-12-31

—-188,357
Source

20-F · 2024-04-30 · 0001193125-24-123906

2023-01-01 to 2023-12-31

Lines labelled “Derived” are calculated from reported figures.

Offerings

Registration 333-297627

424B4 · 2026-07-28 · 0001193125-26-318972

Terms from the governing filing for this registration; not a claim that the offering is open today.

Gross proceeds
6470757.8
Net proceeds
6082512.332
Deal price
0.52
Shares
12443765
Offering price
$0.52
Ticker
CISS

Registration 333-272939

POS AM · 2026-05-05 · 0001193125-26-206516

Terms from the governing filing for this registration; not a claim that the offering is open today.

Registration 333-276430

POS AM · 2026-05-05 · 0001193125-26-206531

Terms from the governing filing for this registration; not a claim that the offering is open today.

Registration 333-276868

POS AM · 2026-05-05 · 0001193125-26-206556

Terms from the governing filing for this registration; not a claim that the offering is open today.

Registration 333-290011

POS AM · 2026-05-05 · 0001193125-26-206570

Terms from the governing filing for this registration; not a claim that the offering is open today.

Filing attachments

d347909dex991.htm · 6-K · 2026-09-29

Exhibit 99.1 C3IS INC. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS The following is a discussion of our financial condition and results of operations for the Overview C3is Inc. is a ship-owning company providing international seaborne transportation services to drybulk charterers, including major national and private industrial users, commodity producers and traders, and since the third quarter of 2023 to oil producers, refineries and commodities t…

6-K · 2026-09-29 · 0001193125-26-405908

Read attachment ↗
d42352dex991.htm · 6-K · 2026-08-27

Exhibit 99.1 C3is Inc. C3is Inc. reports second quarter and six months 2026 financial and operating results Athens, Greece, August 27, 2026 - C3is Inc. (Nasdaq: CISS) (the “Company”), a ship-owning company providing drybulk, crude oil and petroleum products seaborne transportation services, announced today its unaudited financial and operating results for the second quarter and six months ended June 30, 2026. OPERATIONAL AND FINANCIAL HIGHLIGHTS Our handysize dry bulk carriers are on time…

6-K · 2026-08-27 · 0001193125-26-369519

Read attachment ↗
d70076dex41.htm · 6-K · 2026-08-19

Exhibit 4.1 ARTICLES OF AMENDMENT TO AMENDED AND RESTATED ARTICLES OF INCORPORATION OF C3IS INC. Under Section 90 of the Republic of the Marshall Islands Business Corporations Act C3IS INC., a corporation incorporated in and existing under the law of the Republic of the Marshall Islands (the “Corporation”), hereby certifies as follows: (a) The name of the Corporation is: C3IS INC. (b) The Corporation was originally incorporated by filing Articles of Incorporation in the Republic of The…

6-K · 2026-08-19 · 0001193125-26-356854

Read attachment ↗
d70076dex42.htm · 6-K · 2026-08-19

Exhibit 4.2 COMMON STOCK CUSIP No. Y18284 409 Certificate Number Shares C3IS INC. FORMED UNDER THE LAWS OF THE REPUBLIC OF THE MARSHALL ISLANDS THIS CERTIFIES THAT _______________________________________ is the owner of  _______________________________________________ FULLY-PAID AND NON-ASSESSABLE SHARES OF COMMON STOCK, PAR VALUE $0.01 PER SHARE, OF C3is Inc. (hereinafter called the “Company”), transferable on the books of the Company by the holder hereof in person or by duly au…

6-K · 2026-08-19 · 0001193125-26-356854

Read attachment ↗
d124299dex991.htm · 6-K · 2026-08-17

Exhibit 99.1 C3IS INC. ANNOUNCES REVERSE STOCK SPLIT To be effective August 19, 2026 Aiming to meet the minimum bid price requirement for maintaining listing on Nasdaq ATHENS, GREECE - August 17, 2026 - C3IS INC. (the “Company”) (Nasdaq: CISS) today announced that its board of directors has determined to effect a one-for-forty (1-for-40) reverse stock split of the Company’s common stock, par value $0.01 per share. The reverse stock split will take effect at 11:59 pm Eastern Time on August 1…

6-K · 2026-08-17 · 0001193125-26-354028

Read attachment ↗
d165772dex41.htm · 6-K · 2026-07-28

Exhibit 4.1 CLASS F COMMON SHARE PURCHASE WARRANT C3IS INC. Warrant Shares: _______ Initial Exercise Date: July 28, 2026 ───────────────────────────────────────────────────────────────────── THIS COMMON SHARE PURCHASE WARRANT (the “Warrant”) certifies that, for value received, _____________ or its assigns (the “Holder”) is entitled, upon the terms and subject to the limitations on exercise and the conditions hereinafter set forth, at any time on or after the Initial Exercise Date and…

6-K · 2026-07-28 · 0001193125-26-320953

Read attachment ↗

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