October 5, 2022 Lease extension for Riverton office

Exhibit 10.4

AIM ImmunoTech Inc

604 Main Street

Riverton, NJ 08077

DATE: October 3, 2022

604 Associates LLC

701 Bank Avenue

Riverton, NJ 08077

Attn: Lawrence R Antonucci

Re: Lease Renewal

Dear Larry,

This letter is in response to your email dated September 30, 2022. We accept the $350 increase in base rent and would like to renew the lease on the property at the above address for another one-year (12 month) term as defined in Section 1(b) of the current lease Our current lease extension expires on April 30, 2023. As of May 1, 2023 through April 30, 2024 our monthly rent will be $2,850.

If you agree, please sign below.

Sincerely,

/s/Peter W Rodino

Peter W. Rodino, III

COO & General Counsel

/s/Lawrence R. Antonucci 10/5/2022

Lawrence R. Antonucci