(Updates with reporting date in the first paragraph and the latest stock move in the last paragraph)
argenx (ARGX) said Monday a phase 3 study evaluating its experimental drug, Vyvgart Hytrulo, in adults with autoimmune myositis met its main goal.
The company said the patients treated with the drug showed a statistically significant improvement in mean total improvement score at week 52 compared with placebo.
Treatment benefits emerged as early as week 4 and were sustained through the 52-week treatment period, including during steroid tapering, the company said.
argenx said the primary endpoint was also met in patients with immune-mediated necrotizing myopathy, while dermatomyositis patients showed a similar improvement, although it did not reach statistical significance.
Shares of Argenx were up over 7% in recent premarket trading.
Price: $918.18, Change: $+66.89, Percent Change: +7.86%