On December 16, 2025 Cellectar Biosciences, Inc. (NASDAQ: CLRB), a late-stage clinical biopharmaceutical company focused on the discovery and development of drugs for the treatment of cancer, reported a multi-year supply agreement with Ionetix Corporation, a leading cyclotron technology innovator and full-service radioisotope manufacturer, for two critical alpha-emitting radioisotopes: Actinium-225 (Ac-225) and Astatine-211 (At-211).
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Under the agreement, Ionetix will provide Cellectar with a reliable, clinical and commercial-scale supply of cGMP-grade Ac-225 and At-211 to support its drug development programs through clinical trials and into potential commercial launches of targeted alpha therapy (TAT) candidates.
"As we prepare for the future expansion of Cellectar’s radiotherapeutic pipeline beyond our beta and Auger emitter clinical programs and work to advance CLR-225 into clinical trials as a potential treatment for challenging solid tumor cancers such as pancreatic cancer, establishing a dependable and fully scalable supply of high-quality alpha-emitting isotopes is essential for the development of our targeted PRC pipeline," said Jarrod Longcor, chief operating officer of Cellectar Biosciences. "This collaboration with Ionetix ensures sufficient supply of these isotopes moving forward."
Cellectar’s proprietary phospholipid ether platform technology has demonstrated robust delivery of a wide variety of isotopes directly to tumor cells for a broad range of cancers. This unique capability allows Cellectar to identify the optimal isotope for the targeted tumor type. When paired with the platform, Ac-225 and At-211 are ideal alpha-emitting radioisotopes designed to deposit highly localized, high-energy radiation, that can destroy tumors while sparing surrounding healthy tissue.
"We are excited to collaborate with Cellectar to support their mission to deliver life-extending therapies for cancer patients," said David Eve, vice president of medical affairs at Ionetix. "We are currently installing a second cyclotron at our Michigan facility, which will now house two cyclotrons on-site—one dedicated to commercial-scale Ac-225 production and the other dedicated for At-211 production. Our cyclotron-based platform is designed to meet the growing demand for Ac-225 and the rapidly emerging need for At-211—both essential to advancing Cellectar’s next-generation TATs."
(Press release, Cellectar Biosciences, DEC 16, 2025, View Source [SID1234661454])
(Press release, Cellectar Biosciences, DEC 16, 2025, View Source [SID1234661454])