Eckert & Ziegler to Supply Actinium Pharmaceuticals with Ac-225 for Comprehensive Development Activities

Berlin, DE & New York, USA, 25 March 2025. Eckert & Ziegler SE (ISIN DE0005659700, TecDAX) and Actinium Pharmaceuticals, Inc. announced that they have entered into an agreement for the supply of Actinium-225 (Ac-225). With this agreement, Actinium Pharmaceuticals will have access to Eckert & Ziegler’s high-purity Actinium-225 to further develop its promising lead product Actimab-A as well as additional early and late-stage development candidates for both U.S. and international clinical trials.

Targeted radiotherapies using Ac-225 have shown great promise in the treatment of cancer. The radioisotope releases powerful alpha particles with high energy and low penetration depth, enabling precise targeting of tumor cells, including hard-to-reach micrometastases, while minimizing effects on surrounding healthy tissue. Actimab-A is an Ac-225 based radiotherapy agent, directed against CD33, a receptor overexpressed in patients with acute myeloid leukemia (AML) and other myeloid indications.

“We are happy to contribute to the continuous expansion of indications for Actinium-225, which is significantly being advanced by Actinium Pharmaceuticals,” explained Dr. Harald Hasselmann, CEO of Eckert & Ziegler SE. “The progress we have made in our Ac-225 project over the past year marks only the start of our program to address the global shortage of this vital radionuclide.”

Sandesh Seth, Chairman and CEO at Actium Pharmaceuticals, Inc. commented: “We believe that targeted radiation therapy with Actinium-225 is one of the most promising approaches for treating patients with myeloid malignancies and solid tumors. As a pioneer in the development of target radiotherapies, we have aggressive plans to expand our clinical pipeline to address indications with high unmet needs. With this supply agreement with Eckert & Ziegler, we will have access to reliable and constant supply of Ac-225 to advance our product development both in the U.S. as well as internationally.”

Eckert & Ziegler reliably supplies high quality Gallium-68, Lutetium-177, Yttrium-90, and Actinium-225 to leading pharmaceutical companies and research institutions worldwide. With expertise in radioisotope production and global logistics, the company is committed to continuously support the development and delivery of innovative radiopharmaceuticals.

About Eckert & Ziegler
Eckert & Ziegler SE, with more than 1,000 employees, is a leading specialist in isotope-related components for nuclear medicine and radiation therapy. The company offers a broad range of services and products for the radiopharmaceutical industry, from early development work to contract manufacturing and distribution. Eckert & Ziegler shares (ISIN DE0005659700) are listed in the TecDAX index of Deutsche Börse.
Contributing to saving lives.

About Actinium Pharmaceuticals, Inc.
Actinium is a pioneer in the development of targeted radiotherapies intended to meaningfully improve patient outcomes. Actinium is advancing its lead product candidate Actimab-A, a CD33 targeting therapeutic, as potential backbone therapy in acute myeloid leukemia (AML) and other myeloid malignancies leveraging the mutation agnostic alpha-emitter radioisotope payload Actinium-225 (Ac-225). Actimab-A has demonstrated potential activity in relapsed and refractory acute myeloid leukemia (r/r AML) patients in combination with the chemotherapy CLAG-M including high rates of Complete Remissions (CR) including measurable residual disease (MRD) negativity with improved survival outcomes and is being advanced to a pivotal Phase 2/3 trial. In addition, Actinium is engaged with the National Cancer Institute (NCI) under the Cooperative Research and Development Agreement (CRADA) for development of Actimab-A in AML and other myeloid malignancies. The first clinical trial under the CRADA will evaluate the triplet combination comprised of Actimab-A, Venetoclax ( Abbvie / Roche ) an oral Bcl-2 inhibitor and ASTX-727 (Taiho Oncology, an Otsuka holdings company) a novel oral hypomethylating agent (HMA) in frontline acute myeloid leukemia (AML) patients. Iomab-ACT, Actinium's next generation conditioning candidate, is being developed with the goal of improving patient access and outcomes for potentially curative cell and gene therapies. Iomab-B is an induction and conditioning agent prior to bone marrow transplant in patients with r/r AML, which Actinium is seeking a potential strategic partner for the U.S. In addition, the company's R&D efforts are primarily focused on advancing several preclinical programs for solid tumor indications. Actinium holds 230 patents and patent applications including several patents related to the manufacture of the isotope Ac-225 in a cyclotron.
For more information, please visit: https://www.actiniumpharma.com/

Contact
Eckert & Ziegler SE
Robert-Rössle-Str. 10, 13125 Berlin, Germany
Jan Schöpflin, Marketing / Karolin Riehle, Investor Relations
jan.schoepflin@ezag.com / karolin.riehle@ezag.com 
Tel.: +49 (0) 30 / 94 10 84-138; www.ezag.com

Actinium Pharmaceuticals, Inc.
investorrelations@actiniumpharma.com