SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

C3is Inc.

(Name of Issuer)

Common Shares, par value $0.01

(Title of Class of Securities)

Y18284169

(CUSIP Number)

08/14/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP Number(s):

Y18284169

Names of Reporting Persons

S.H.N. Financial Investments Ltd.

Check the appropriate box if a member of a Group (see instructions)

(a)

(b)

Sec Use Only

Citizenship or Place of Organization

ISRAEL

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 46,719.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 46,719.00
8	Shared Dispositive Power 0.00

Aggregate Amount Beneficially Owned by Each Reporting Person

46,719.00

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

Checkbox not checked

Percent of class represented by amount in row (9)

0.4 %

Type of Reporting Person (See Instructions)

SCHEDULE 13G

Item 1.

(a)

Name of issuer:

C3is Inc.

(b)

Address of issuer's principal executive offices:

331 Kifissias Avenue, Kifissia14561 Athens, Greece, 14561

Item 2.

(a)

Name of person filing:

S.H.N. Financial Investments Ltd.

(b)

Address or principal business office or, if none, residence:

Herzliya Hills Arik Einstein 3, Israel, 4610301

(c)

Citizenship:

Israel

(d)

Title of class of securities:

Common Shares, par value $0.01

(e)

CUSIP No.:

Y18284169

Item 3.

If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:

(a)

Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);

(b)

Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);

(c)

Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);

(d)

Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);

(e)

An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);

(f)

An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);

(g)

A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);

(h)

A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);

(i)

A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);

(j)

A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:

(k)

Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).

Item 4.

Ownership

(a)

Amount beneficially owned:

46,719 This amendment refers to a Schedule 13G filed with the Securities and Exchange Commission on December 18, 2025, covering 443,213 Common Shares purchased on December 11, 2025. The amounts in Row (5), (7) and (9) represent 46,719 Series D Warrants to purchase Common Shares. The percentage set forth on Row (11) of the cover page for the reporting person is based on 13,082,612 Common Shares outstanding, based on the Issuer's Prospectus filed under Rule 424(b)(4) with the Securities and Exchange Commission on July 28, 2026. Nir Shamir is the Chief Executive Officer of the Reporting Person. As such, Mr. Shamir may be deemed to beneficially own (as that term is defined in Rule 13d-3 under the Securities Exchange Act of 1934) the securities described herein. To the extent Mr. Shamir is deemed to beneficially own such securities, Mr. Shamir disclaims beneficial ownership of these securities for all other purposes.

(b)

Percent of class:

0.4%

(c)

Number of shares as to which the person has:

(i) Sole power to vote or to direct the vote:

46,719

(ii) Shared power to vote or to direct the vote:

(iii) Sole power to dispose or to direct the disposition of:

46,719

(iv) Shared power to dispose or to direct the disposition of:

Item 5.

Ownership of 5 Percent or Less of a Class.

Ownership of 5 percent or less of a class

Item 6.

Ownership of more than 5 Percent on Behalf of Another Person.

Not Applicable

Item 7.

Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.

Not Applicable

Item 8.

Identification and Classification of Members of the Group.

Not Applicable

Item 9.

Notice of Dissolution of Group.

Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

S.H.N. Financial Investments Ltd.

Signature:	/s/ Nir Shamir
Name/Title:	Nir Shamir, Chief Executive Officer
Date:	08/14/2026