Telix Adds Lead-212 Isotope Production Capability

MELBOURNE, Australia and INDIANAPOLIS, March 13, 2025 /PRNewswire/ -- Telix Pharmaceuticals Limited (ASX: TLX, Nasdaq: TLX, Telix, the Company) today announces that it has developed and validated a breakthrough generator technology for the production of lead-212 (²¹²Pb) and successfully completed first production.

The new generator technology, developed internally by Telix's IsoTherapeutics team, produces ²¹²Pb via a sealed Thorium-228 (²²⁸Th) source, and significantly increases the amount of radioactivity, yield and shelf life compared to currently available ²¹²Pb generators. The fully automated, high-output generators have a small, single hot cell footprint and produce sufficient ²¹²Pb elution for up to 60 clinical doses, with the potential to further scale. The production footprint has been designed to be deployed throughout Telix's (and select partner) manufacturing and distribution networks, including the recently acquired RLS Radiopharmacies network. This development builds on Telix's extensive experience with developing generator-based radiopharmaceutical products.

The novel technology opens new opportunities for the development of alpha-emitting radiopharmaceuticals for use in Telix's next-generation therapeutics pipeline. Lead-212 is a promising isotope for Targeted Alpha Therapy (TAT) but its relatively short half-life (10.6 hours, compared with 9.9 days for actinium-225, ²²⁵Ac) and lack of production scale has limited commercial potential. The alpha-emitting profile of ²¹²Pb also has practical synergies with engineered antibodies being developed using Telix's newly acquired discovery platform^[1], with pharmacology and clearance organ characteristics that are well suited to its short half-life.

Chad Watkins, General Manager, Isotope Strategy, Telix, said, "A lead-212 generator that produces minimal waste and fits within the current radiopharmacy footprint is a step change in the production of this alpha emitting therapeutic radioisotope. It creates the potential for commercial scale lead-212 isotope production that wasn't possible before and opens up new pathways for matching this promising alpha isotope with a range of targeting agents."

About Telix Pharmaceuticals Limited

Telix is a biopharmaceutical company focused on the development and commercialization of therapeutic and diagnostic radiopharmaceuticals and associated medical technologies. Telix is headquartered in Melbourne, Australia, with international operations in the United States, Canada, Europe (Belgium and Switzerland), and Japan. Telix is developing a portfolio of clinical and commercial stage products that aims to address significant unmet medical needs in oncology and rare diseases. ARTMS, IsoTherapeutics, Lightpoint, Optimal Tracers and RLS are Telix Group companies. Telix is listed on the Australian Securities Exchange (ASX: TLX) and the Nasdaq Global Select Market (Nasdaq: TLX).

Visit www.telixpharma.com for further information about Telix, including details of the latest share price, ASX and SEC filings, investor and analyst presentations, news releases, event details and other publications that may be of interest. You can also follow Telix on LinkedIn, X and Facebook.

Telix Investor Relations

Ms. Kyahn WilliamsonTelix Pharmaceuticals LimitedSVP Investor Relations and Corporate CommunicationsEmail: kyahn.williamson@telixpharma.com

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