SEC Form S-8 filed by Imunon Inc.

As filed with the Securities and Exchange Commission on June 17, 2026

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM S-8

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

IMUNON, INC.

(Exact name of registrant as specified in its charter)

997 Lenox Drive, Suite 100

Lawrenceville, NJ 08648-2311

(Address of principal executive offices) (Zip code)

Imunon, Inc. 2018 Stock Incentive Plan

(Full title of the plan)

Stacy R. Lindborg

President and Chief Executive Officer

997 Lenox Drive, Suite 100

Lawrenceville, NJ 08648

(609) 896-9100

(Name, address and telephone number, including area code, of agent for service)

Copies to:

Jurgita Ashley

Thompson Hine LLP

3900 Key Center

127 Public Square

Cleveland, Ohio 44114

(216) 566-5500

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

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 7(a)(2)(B) of the Securities Act. ☐

EXPLANATORY NOTE

On June 16, 2026, the shareholders of Imunon, Inc. (the “Registrant”) approved an amendment to the Imunon, Inc. 2018 Stock Incentive Plan, as amended as of June 16, 2026 (the “Amended Plan”) to increase the number of shares of the Registrant’s common stock, par value $0.01 (the “Common Stock”) that are available for issuance thereunder by 1,000,000 shares. This Registration Statement on Form S-8 is being filed by the Registrant for the purpose of registering an additional 1,000,000 shares of Common Stock, in accordance with the Amended Plan. Pursuant to Instruction E of Form S-8, the contents of the (i) the Form S-8 Registration Statement (File No. 333-291493) filed with the Securities and Exchange Commission (the “Commission”) on November 13, 2025, (ii) the Form S-8 Registration Statement (File No. 333-273923) filed with the Commission on August 11, 2023, (iii) the Form S-8 Registration Statement (File No. 333-266882) filed with the Commission on August 15, 2022, (iv) the Form S-8 Registration Statement (File No. 333-240275) filed with the Commission on July 31, 2020, (v) the Form S-8 Registration Statement (File No. 333-233344) filed with the Commission on August 16, 2019, and (vi) the Form S-8 Registration Statement (File No. 333-225045) filed with the Commission on May 18, 2018 are incorporated by reference herein, except to the extent supplemented, amended or superseded by the information set forth below.

PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 3. Incorporation of Documents by Reference.

The Registrant hereby incorporates by reference in this Registration Statement the following documents and information previously filed with the Commission:

All documents subsequently filed by the Registrant with the Commission pursuant to Sections 13(a), 13(c), 14 and 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), after the date of this Registration Statement and prior to the filing of a post-effective amendment to this Registration Statement which indicates that all securities offered hereby have been sold or which deregisters all securities then remaining unsold, shall be deemed to be incorporated by reference herein and to be a part hereof from the respective dates of filing of such documents (such documents, and the documents enumerated above, being hereinafter referred to as “Incorporated Documents”). Any statement contained in an Incorporated Document shall be deemed to be modified or superseded for purposes of this Registration Statement to the extent that a statement contained herein or in any other subsequently filed Incorporated Document modifies or supersedes such statement. Any such statement so modified or superseded shall not be deemed, except as so modified or superseded, to constitute a part of this Registration Statement.

Notwithstanding the foregoing, unless specifically stated to the contrary, none of the information disclosed by the Registrant under Items 2.02 or 7.01 of any Current Report on Form 8-K, including the related exhibits under Item 9.01, or other information that the Registrant may from time to time furnish to the Commission will be incorporated by reference into, or otherwise included in, this Registration Statement.

Item 8. Exhibits.

* Filed herewith.

SIGNATURES

Pursuant to the requirements of the Securities Act, the Registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Lawrenceville, State of New Jersey on June 17, 2026.

POWER OF ATTORNEY

Each person whose signature appears below constitutes and appoints Stacy R. Lindborg and Susan Eylward, acting alone or together with another attorney-in-fact, as his or her true and lawful attorneys-in-fact and agents, with full power of substitution and resubstitution, for him or her and in his or her name, place, and stead, in any and all capacities, to sign any and all amendments (including post-effective amendments, exhibits thereto and other documents in connection therewith) to this Registration Statement, and to file the same, with all exhibits thereto, and other documents in connection therewith, and any subsequent registration statements pursuant to Rule 462 of the Securities Act, with the Commission, granting unto said attorneys-in-fact and agents, and each of them, full power and authority to do and perform each and every act and thing requisite and necessary to be done in and about the premises, as fully to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or his or her substitute or substitutes, may lawfully do or cause to be done by virtue hereof.

Pursuant to the requirements of the Securities Act, this Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.