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High materiality9/10

Amgen's IMDELLTRA combo yields 58% survival benefit in ES-SCLC

Oct 24, 2026, 10:42 AM EDT2 sourcesAI-analyzed
Why it may matterVerify against the original reporting

Stronger-than-expected survival benefits and early OS durability in ES-SCLC can drive multiple expansion for AMGN's oncology franchise, especially if regulatory momentum develops; however, safety signals and dependence on regulatory approval create some execution risk.

AI summary

What happened, with direct paths to the underlying reporting

Amgen announced interim Phase 3 DeLLphi-305 results showing IMDELLTRA with durvalumab delivering a 58% reduction in death risk (HR 0.42). OS rose to 21.1 months, with about 80% alive at one year versus 53% on durvalumab alone; PFS HR 0.34 and ORR 26.4% versus 4.1%. Published in NEJM and presented at ESMO 2026, the data could drive regulatory interest and expand Amgen's oncology franchise.

  • IMDELLTRA plus durvalumab reduces death risk by 58% (HR 0.42) in ES-SCLC.
  • OS median to 21.1 months vs 12.7 with durvalumab alone.
  • One-year survival ~80% vs ~53%; PFS HR 0.34; ORR 26.4% vs 4.1%.
  • Results published in NEJM and presented at ESMO 2026; potential regulatory impact.

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