AIM ImmunoTech Inc. (NYSE:AIM) ("AIM" or the "Company") today announced the Final Primary Endpoint Report on Objective Response Rate data from a University of Pittsburgh Medical Center ("UPMC") Phase 2 clinical trial – in which AIM and Merck Sharp & Dohme ("Merck") are collaborators – evaluating Ampligen® (rintatolimod) in combination with checkpoint inhibition and chemotherapy in recurrent ovarian cancer—data that may signal a major step forward in overcoming resistance to immunotherapy. The study aimed to improve clinical outcomes by overcoming the immunosuppressive tumor microenvironment characteristic of ovarian cancer through locoregional and systemic immune activation strategies. This clinical trial was financially supported by a Merck grant.

Read more about the study at ClinicalTrials.gov: NCT03734692.

Topline results included:

50% Objective Response Rate (ORR), including 21% complete responses
79% Clinical Benefit Rate
Median Overall Survival of 32.5 months
Durable responses exceeding 70+ months in select patients
No Grade 4 or 5 toxicities observed

Collection of additional secondary endpoint data including progression-free survival, time to disease progression and overall survival is expected to be completed in January 2027.

Robert P. Edwards, MD, McCall Chair of Obstetrics, Gynecology, and Reproductive Science at the University of Pittsburgh School of Medicine, stated: "This single-arm Phase 2 trial is the third in a series of consecutive studies evaluating IP chemotherapy or chemoimmunotherapy using this analytical approach. The addition of IP Ampligen and systemic PD-1 checkpoint inhibition to IP cisplatin chemotherapy resulted in a significant improvement in both clinical response rates and immune activation across highly comparable patient cohorts in the 3 trials."

AIM Chief Executive Officer Thomas K. Equels stated, "These results represent what we believe is a strong step forward in the potential to enhance treatment of recurrent ovarian cancer, if further studies support findings of relatively low toxicity, clinical benefit and durable response. Once again, data suggests that Ampligen may unlock the full potential of checkpoint immunotherapies. We are particularly encouraged by the durability of the observed responses. This supports our proposition that Ampligen has the potential to play a major role in solid tumor immuno-oncology — expanding the number of patients who benefit from checkpoint inhibitors across multiple cancer types, including ovarian cancer and pancreatic cancer. With strong intellectual property protection extending into 2039 and a growing body of positive clinical evidence, we believe we are well positioned to advance Ampligen into later-stage development and strategic partnerships."