Data demonstrate compelling evidence of the immune-stimulatory properties linked to TLR-3 activation through Ampligen

OCALA, Fla., March 25, 2024 — AIM ImmunoTech Inc. (NYSE American: AIM) ("AIM") today announced the publication of new data analysis from a long-term Early Access Program ("EAP") studying the company's drug Ampligen (rintatolimod) for the treatment of advanced pancreatic ductal adenocarcinoma ("PDAC"). The manuscript titled "Rintatolimod in Advanced Pancreatic Cancer enhances Anti-Tumor Immunity through Dendritic Cell-Mediated T Cell Responses," appears in the journal Clinical Cancer Research, one of oncology's most prestigious journals.

Ampligen is a dsRNA product candidate that acts via the TLR-3 receptor present on several immune cells, epithelial cells and tumors. Researchers at the Erasmus University Medical Center ("Erasmus MC") found that Ampligen treatment in pancreatic cancer patients enhances peripheral immune activity at the transcriptomic and proteomic levels, particularly involving type 1 conventional dendritic cells (cDC1s) and T cells. Post-Ampligen, the increased peripheral abundance of BTLA+XCR1+ cDC1s and CD4+SELL+ T cells correlated with improved clinical outcomes. Patients with stable disease exhibited pronounced overexpression of genes related to DC and T cell activation. Notably, the expression of immune checkpoints PD-L1 and PD-L2 decreased post-Ampligen across all patients.

AIM Chief Executive Officer Thomas K. Equels stated: "We have already seen that Ampligen as a single-agent therapy was associated with improved progression-free survival and overall survival in these Early Access Program pancreatic cancer patients. This new data analysis provides us further insight into exactly why that's the case, which could give us the ability to identify cancer patients who might benefit more from Ampligen treatment than they would from other known cancer treatments. Additionally, the changes in the tumor microenvironment we see in pancreatic cancer are similar to those we have seen in triple-negative breast cancer, ovarian cancer and colorectal cancer metastatic to the liver. We have hypothesized that Ampligen has the potential to be efficacious in almost every solid tumor type based on its direct effect on malignant tumor cells and its effect on the tumor micro-environment. All these data combined lend further credence to the broad applicability of Ampligen in solid tumors."

Prof. Casper H.J. van Eijck, MD, PhD, Pancreato-biliary Surgeon at Erasmus MC and co-author of the published paper, stated, "Based on these results, we believe Ampligen may break immunological tolerance by enhancing anti-tumor immunity through DC-mediated T-cell responses. The data suggests that Ampligen infusions modulate PD-L1 and PD-L2 expression in the tumor microenvironment, while at the same time they upregulate Ki67+CD4+ and Ki67+CD8+ T-cells. We therefore believe that combining Ampligen with an immune checkpoint inhibitor – such as durvalumab – could synergistically circumvent immune blockade and potentially mitigate the T-cell exhaustion known to occur with immune checkpoint therapies. We look forward to further evaluating Ampligen toward potentially meeting the critical need for more effective therapies to treat pancreatic cancer, including with the ongoing DURIPANC trial, which looks at the combination effect of Ampligen and AstraZeneca's durvalumab."

AIM is currently evaluating Ampligen as a therapy for metastatic pancreatic ductal adenocarcinoma in the Phase 1b/2 DURIPANC clinical study (NCT05927142) and as a therapy for locally advanced pancreatic adenocarcinoma in the Phase 2 AMP-270 clinical study (NCT05494697).

About AIM ImmunoTech Inc.

AIM ImmunoTech Inc. is an immuno-pharma company focused on the research and development of therapeutics to treat multiple types of cancers, immune disorders and viral diseases, including COVID-19. The Company's lead product is a first-in-class investigational drug called Ampligen (rintatolimod), a dsRNA and highly selective TLR3 agonist immuno-modulator with broad spectrum activity in clinical trials for globally important cancers, viral diseases and disorders of the immune system.

For more information, please visit aimimmuno.com and connect with the Company on X, LinkedIn, and Facebook.

Cautionary Statement

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 (the "PSLRA"). Words such as "may," "will," "expect," "plan," "anticipate," "continue," "believe," "potential," "upcoming" and other variations thereon and similar expressions (as well as other words or expressions referencing future events or circumstances) are intended to identify forward-looking statements. Many of these forward-looking statements involve a number of risks and uncertainties. Publication of this data and clinical success seen to date does not guarantee that Ampligen will be approved for the commercial treatment of pancreatic cancer. The Company urges investors to consider specifically the various risk factors identified in its most recent Form 10-K, and any risk factors or cautionary statements included in any subsequent Form 10-Q or Form 8-K, filed with the U.S. Securities and Exchange Commission. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release. Among other things, for those statements, the Company claims the protection of the safe harbor for forward-looking statements contained in the PSLRA. The Company does not undertake to update any of these forward-looking statements to reflect events or circumstances that occur after the date hereof.

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Investor Contact:  JTC Team, LLC Jenene Thomas (833) 475-8247 AIM@jtcir.com