Heidelberg Pharma Advances to Cohort 9 in Phase I/IIa Trial of Lead ATAC Candidate HDP-101 in Multiple Myeloma

  • HDP-101 continues to demonstrate a favorable safety profile with no dose-limiting toxicities observed
  • Early evidence of clinical activity observed in Cohort 8, highlighted by a very good partial response observed in one patient

Ladenburg, Germany, 25 September 2025 – Heidelberg Pharma AG (FSE: HPHA), a clinical-stage biotech company developing innovative Antibody Drug Conjugates (ADCs), today announced the initiation of Cohort 9 in its ongoing Phase I/IIa dose escalation trial of HDP-101, the Company’s lead ATAC candidate for the treatment of relapsed or refractory multiple myeloma.

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