Anaptys Files Motion to Dismiss Tesaro’s Claim of Anticipatory Breach of Contract in Ongoing Litigation Against Tesaro, a GSK subsidiary
01/08/2026 06:00 PM • AnaptysBio filed a motion to dismiss Tesaro's anticipatory breach of contract claim in Delaware Chancery Court regarding their Collaboration Agreement over royalties from Jemperli (dostarlimab). Anaptys claims it sought good faith discussions to resolve alleged breaches by Tesaro and GSK, but Tesaro initiated a lawsuit without notice. The court is expected to hear arguments by early March, with trial scheduled for July 14-17, 2026.
ANAB - Anaptys is defending against litigation by filing a motion to dismiss, which is a standard legal procedure. While the company is in dispute with Tesaro/GSK, the motion filing itself is a procedural action without clear indication of favorable or unfavorable outcome. The company maintains it acted in good faith and is seeking to vindicate its contract rights.
Investing.com • Jeffrey Neal Johnson