Actinium Pharmaceuticals to Present Business Update at Trump Mar-A-Lago Club Today

- Company to highlight recent significant progress made with its Actimab-A and Iomab-ACT clinical programs, leading-edge R&D and radiopharmaceutical manufacturing infrastructure

- Revitalized clinical programs focused on 3 separate multi-billion-dollar market opportunities in
myeloid malignancies, solid tumors and cell & gene therapy conditioning with clinical data
expected in 2025 supporting each addressable market

- Presentation follows Investor KOL Event and Company Update on March 25^th

NEW YORK, March 26, 2025 /PRNewswire/ -- Actinium Pharmaceuticals, Inc. (NYSE AMERICAN: ATNM) (Actinium or the Company), a pioneer in the development of targeted radiotherapies, announced it will be presenting a business update today at Trump Mar-a-Lago Club, Florida. This presentation follows an Investor KOL Call and Company Update hosted by Actinium on Tuesday, March 25^th highlighting its revitalized clinical programs and expanded market opportunities. Actinium's Investor KOL Call and Company Update can be accessed for replay here.  

Sandesh Seth, Actinium's Chairman and CEO, said, "We are honored to have this opportunity to present Actinium Pharmaceuticals and highlight the significant progress we have made in the last several months at the Mar-a-Lago Club. We have great enthusiasm for our revamped clinical programs and expect to achieve significant milestones in 2025. If successful, we will have the opportunity to address multiple potential blockbuster market opportunities with Actimab-A in myeloid malignancies and solid tumors and with Iomab-ACT for cell and gene therapy conditioning."

Actinium has outlined its expanded market opportunities and expected 2025 milestones for each of its clinical programs as well as its R&D and radiopharmaceutical manufacturing capabilities as follows:

Actimab-A as a mutation agnostic, backbone therapy for myeloid malignancies including acute myeloid leukemia (AML) and myelodysplastic syndromes (MDS) across multiple treatment settings

• Initiate Phase 2/3 trial in combination with CLAG-M in relapsed or refractory AML and seek potential partners or collaborators
• Generate initial clinical data in frontline AML in first trial under CRADA with NCI
• Initiate additional clinical trials in myeloid malignancies

Actimab-A as a pan solid tumor therapy in combination with PD-1 inhibitors including KEYTRUDA and OPDIVO by depleting myeloid derived suppressor cells (MDSCs)

• Generate clinical proof of concept data in head and neck squamous cell carcinoma and non-small cell lung cancer
• Explore additional solid tumor indications for future trials

Iomab-ACT as a universal targeted conditioning agent to increase patients access to cell & gene therapies and improve patient outcomes

• Present initial data from commercial CAR-T trial at University of Texas Southwestern
• Generate clinical data in first non-malignant indication from sickle cell disease allogeneic stem cell transplant trial at Columbia University

Pipeline Expansion Leveraging Targeted Radiotherapy R&D Capabilities

• Present abstract at AACR highlighting Actinium-225 targeted radiotherapy for novel radiotherapy cancer target

Establish In-house Radiopharmaceutical Manufacturing & Production

• Advance build-out of manufacturing facility
• Explore strategic partnerships leveraging proprietary Actinium-225 cyclotron manufacturing technology

Mr. Seth continued, "In addition to the multitude of milestones that lie ahead for our clinical programs, we are excited to highlight our expanding capabilities. As a pioneer in targeted radiotherapy, we are leveraging our robust know-how and intellectual property to develop new pipeline programs to address indications with high unmet needs. In addition, we are investing in our infrastructure and are thrilled to be moving ahead with the build-out of our manufacturing facility starting next quarter in anticipation of future clinical success. Finally, we look forward to fully leveraging our proprietary Actinium-225 cyclotron manufacturing technology to meet our projected demand given our expanding Actinium-225 programs as well as facilitate strategic partnerships. With our strong balance sheet providing runway into mid-2027, our team is focused and committed on execution and value creation."

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) and measurable residual disease (MRD) negativity leading to 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. Additionally, Actinium is developing Actimab-A as a potential pan tumor therapy in combination with PD-1 checkpoint inhibitors including KEYTRUDA^® and OPDIVO^® by depleting myeloid derived suppressor cells (MDSCs), which represents a potential multi-billion-dollar addressable market. 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/

Forward-Looking Statements

This press release may contain projections or other "forward-looking statements" within the meaning of the "safe-harbor" provisions of the private securities litigation reform act of 1995 regarding future events or the future financial performance of the Company which the Company undertakes no obligation to update. These statements are based on management's current expectations and are subject to risks and uncertainties that may cause actual results to differ materially from the anticipated or estimated future results, including the risks and uncertainties associated with preliminary study results varying from final results, estimates of potential markets for drugs under development, clinical trials, actions by the FDA and other governmental agencies, regulatory clearances, responses to regulatory matters, the market demand for and acceptance of Actinium's products and services, performance of clinical research organizations and other risks detailed from time to time in Actinium's filings with the Securities and Exchange Commission (the "SEC"), including without limitation its most recent annual report on form 10-K, subsequent quarterly reports on Forms 10-Q and Forms 8-K, each as amended and supplemented from time to time.

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SOURCE Actinium Pharmaceuticals, Inc.