Novartis AGdel-desiran failed its primary goal in a late-stage myotonic dystrophy type 1 trial, its third clinical setback in a week

Novartis shares fell about 10% after the company said its experimental drug del-desiran failed to meet its primary goal in a late-stage trial for myotonic dystrophy type 1, marking its third clinical setback in a week. The earlier failures involved the cardiovascular drug pelacarsen and a pause of eight trials of the cell therapy rap-cel following three patient deaths. The decline erased roughly 24 billion Swiss francs, or about $29.6 billion, in market value and put Novartis on pace for one of its worst trading days in company history. Barclays had estimated peak annual sales of about $3.1 billion for del-desiran and assigned the drug a 60% probability of success after positive mid-stage results, and the failure raises questions about the $12 billion Avidity acquisition that brought the drug into Novartis' pipeline. Management reaffirmed its full-year financial guidance and maintained its target for 5% to 6% compound annual sales growth from 2025 through 2030, while the company reported successful late-stage results for remibrutinib in multiple sclerosis and expects more data later this year.
Novartis AGdel-desiran failed its primary goal in a late-stage myotonic dystrophy type 1 trial, its third clinical setback in a week
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