Novartis AGLead drug del-desiran failed primary endpoint in pivotal trial, causing 10.1% plunge.

Novartis shares plunged 10.1% to $138.51 on Tuesday after its drug del-desiran failed to meet the primary endpoint in a pivotal trial for myotonic dystrophy, erasing about CHF24 billion in market value. The setback directly impacts Novartis's $12 billion acquisition of Avidity Biosciences, of which del-desiran is the lead asset. The HARBOR study, involving roughly 150 patients, showed no statistically significant improvement over placebo in video hand-opening time, though some secondary measures hinted at clinical activity and safety remained consistent. Management will review the full data before deciding on further investment. The failure leaves Avidity's two other programs under greater scrutiny, and while Novartis still targets 5% to 6% annual sales growth through 2030, investors now demand harder evidence from the remaining pipeline.
Novartis AGLead drug del-desiran failed primary endpoint in pivotal trial, causing 10.1% plunge.
Lead asset del-desiran failed trial, jeopardizing $12B acquisition and pipeline value.