Actinium Pharmaceuticals Announces New Pan-Tumor Preclinical Data for ATNM-400 in Solid Tumors and Differentiated Mechanism for Actimab-A in AML to be Presented at 2026 AACR Annual Meeting

New data underscoring the potential of ATNM-400 as a first-in-class Ac-225 radioconjugate with broad pan-tumor efficacy across multiple solid tumor models  Actimab-A demonstrates mutation-agnostic efficacy and a novel mechanism that enhances response to standard AML therapies  Multiple data catalysts for ATNM-400 and Actimab-A in 2026; and posters for each to be presented on April 21, 2026 at AACR 2026 in San Diego, CA NEW YORK, April 6, 2026 /PRNewswire/ -- Actinium Pharmaceuticals, Inc. (NYSE American: ATNM) (Actinium or the Company), a pioneer in the development of targeted radiotherapies, today announced the publication of two abstracts that will be presented at the American Association for Cancer Research (AACR) Annual Meeting 2026, taking place April 17–22, 2026, in San Diego, California. The Company will present previously undisclosed data demonstrating the expanding potential of its Ac-225 radiotherapy platform across both solid tumors and hematologic malignancies.