Delaware Chancery Court Rules in Favor of Anaptys by Dismissing Tesaro’s Anticipatory Breach Claim

SAN DIEGO, April 24, 2026 (GLOBE NEWSWIRE) — AnaptysBio, Inc. (Nasdaq: ANAB), a company focused on managing the financial collaborations for Jemperli with GSK and imsidolimab with Vanda, today announced that the Delaware Chancery Court has dismissed Tesaro’s anticipatory breach of contract claim against Anaptys. The ruling agrees with Anaptys’ position that it has never repudiated the Collaboration and Exclusive License Agreement (“Collaboration Agreement”) with Tesaro, a subsidiary of GSK, governing the development and commercialization of Jemperli.

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