RAD Achieves Partial Response in Phase 1 Trial of RAD204

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Stock Radiopharm Theranostics Ltd (RAD.ASX)
Release Time 22 Jul 2026, 8:32 a.m.
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 RAD Achieves Partial Response in Phase 1 Trial of RAD204
Key Points
  • First RECIST-confirmed durable Partial Response at highest dose level
  • Second patient shows early tumor shrinkage and remains progression-free
  • RAD204 well-tolerated with no dose-limiting toxicities observed
  • Positive initial data supports the therapeutic potential of RAD204
Full Summary

Radiopharm Theranostics announced updated results from the ongoing Phase 1 trial of RAD204, its PD-L1-targeted lutetium-177 nanobody radiotherapeutic, in patients with advanced solid tumors post-immunotherapy. The trial's third cohort, at the highest dose level of 90 mCi, achieved a confirmed durable partial response in the first patient, with a 43% reduction in target lesions. The patient remains progression-free beyond seven months. The second patient showed early tumor shrinkage and is also progression-free. RAD204 has demonstrated a favorable safety profile with no dose-limiting toxicities observed. These results support the therapeutic potential of RAD204 in PD-L1-associated malignancies.