UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 26, 2025

Cell Source, Inc.

(Exact name of registrant as specified in its charter)

Nevada

000-55413

32-0379665

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

57 West 57th Street, Suite 400, New York, New York 10019
(Address of principal executive offices, including Zip Code)

(646) 416-7896

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading symbol(s)		Name of each exchange on which registered
None		N/A		N/A

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§232.405 of this chapter) or Rule 12b-2 of the Securities and Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging Growth Company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 4.01 Changes in Registrant’s Certifying Accountant.

CBIZ CPAs P.C. (“CBIZ CPAs”) acquired the attest business of Marcum LLP (“Marcum”), effective November 1, 2024. As a result of this transaction, on June 26, 2025, Marcum resigned as the independent registered public accounting firm of Cell Source, Inc. (the “Company”) and, with the approval of the Audit Committee of the Company’s Board of Directors, CBIZ CPAs was engaged as the Company’s independent registered public accounting firm for the year ended December 31, 2024.

The audit reports of Marcum on the Company’s consolidated financial statements for the fiscal years ended December 31, 2023 and 2022 contained no adverse opinion or disclaimer of opinion and were not qualified or modified as to uncertainty, audit scope or accounting principles, except that the report for the fiscal years ended December 31, 2023 and 2022 included an explanatory paragraph relating to substantial doubt about the Company’s ability to continue as a going concern. Marcum did not provide an audit report on the Company’s consolidated financial statement for the year ended December 31, 2024.

During the fiscal years ended December 31, 2024, 2023, 2022 and the subsequent interim period through June 26, 2025, there were (i) no disagreements (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) with Marcum on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedure, which disagreements if not resolved to the satisfaction of Marcum would have caused them to make reference thereto in connection with their reports on the financial statements for such years and (ii) no reportable events (as described in Item 304(a)(1)(v) of Regulation S-K).

During the fiscal years ended December 31, 2024, 2023 and 2022, and through June 26, 2025, neither the Company nor anyone on its behalf consulted with CBIZ CPAs regarding either: (i) the application of accounting principles to a specific transaction, either completed or proposed, or the type of audit opinion that might be rendered on the Company’s financial statements, and neither a written report nor oral advice was provided to the Company that CBIZ CPAs concluded was an important factor considered by the Company in reaching a decision as to the accounting, auditing or financial reporting issue; or (ii) any matter that was either the subject of a disagreement (as defined in Item 304(a)(1)(iv) of Regulation S-K and the related instructions) or any reportable event (as described in Item 304(a)(1)(v) of Regulation S-K).

The Company provided Marcum with a copy of the above statements and requested that Marcum furnish it with a letter addressed to the U.S. Securities and Exchange Commission stating whether or not it agrees with the above statements. A copy of such letter, dated June 27, 2025, is filed as Exhibit 16.1 to this Current Report on Form 8-K.

ITEM 9.01. FINANCIAL STATEMENT AND EXHIBITS.

(d)

Exhibits.

	Exhibit No.		Description

	16.1		Letter from Marcum LLP, dated June 27, 2025, addressed to the Securities and Exchange Commission

	104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Date: June 27, 2025

	Cell Source, Inc.

	By:	/s/ Itamar Shimrat
		Itamar Shimrat
		President and Chief Executive Officer

Cell Source, Inc. 8-K