Actinium Pharmaceuticals Presents New Preclinical Data Demonstrating Potent Anti-Tumor Activity of ATNM-400 Across Multiple Breast Cancer Subtypes Including Hormone Receptor-Positive, Trip...
Actinium Pharmaceuticals, Inc. (Delaware) (ATNM)
NASDAQ:AMEX Investor Relations:
ir.actiniumpharma.com
Company Research
Source: Acquire Media Monitor
- The Actinium-225 alpha-emitter payload of ATNM-400 induced irreversible double-strand DNA breaks and has the potential to produce potent localized tumor killing with reduced off-target lung toxicity that limits the use of antibody drug conjugates - Data supports the continued development of ATNM-400 as a monotherapy or combination therapy to address multiple breast cancer subtypes with limited treatment options NEW YORK Dec. 12, 2025 /PRNewswire/ -- Actinium Pharmaceuticals, Inc. (NYSE American: ATNM), a leader in the development of differentiated targeted radiotherapies, today announced the presentation of new preclinical data for ATNM-400, its first-in-class Actinium-225 (Ac-225) based antibody radioconjugate, at the 2025 San Antonio Breast Cancer Symposium (SABCS). The data highlight robust anti-tumor activity and a favorable tolerability profile across a broad panel of preclinical breast cancer models, including hormone receptor–positive (HR+), triple-negative breast cancer
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News
- Actinium Pharmaceuticals Presents New Preclinical Data Demonstrating Potent Anti-Tumor Activity of ATNM-400 Across Multiple Breast Cancer Subtypes Including Hormone Receptor-Positive, Triple-Negative, and Tamoxifen- and HER2 Therapy-Resistant Breast CancePR Newswire
- Actinium Pharmaceuticals Announces ATNM-400 Data Demonstrating Potent Efficacy in Triple-Negative Breast Cancer and Ability to Overcome Endocrine and HER2-Targeted Therapy Resistance Being Presented at the San Antonio Breast Cancer Symposium [Yahoo! FinanYahoo! Finan
- Actinium Pharmaceuticals Announces ATNM-400 Data Demonstrating Potent Efficacy in Triple-Negative Breast Cancer and Ability to Overcome Endocrine and HER2-Targeted Therapy Resistance Being Presented at the San Antonio Breast Cancer SymposiumPR Newswire
- Actinium Pharmaceuticals, Inc. to Highlight ATNM-400 Data in Hormone-Resistant and HER2-Resistant Breast Cancer at the 2025 San Antonio Breast Cancer Symposium, Expanding Pan-Tumor Profile Across Three Solid Tumor IndicationsPR Newswire
- Actinium Pharmaceuticals, Inc. to Participate in the Stephens Biotechnology Virtual Fireside Chat ConferencePR Newswire
ATNM
Sec Filings
- 11/26/25 - Form 8-K
- 11/14/25 - Form 10-Q
- 11/5/25 - Form ARS
- ATNM's page on the SEC website