GSK’s Jemperli Court Fight Just Got Tougher Before Q1 Earnings
A Delaware court dismissed Tesaro’s claim that AnaptysBio anticipatorily breached their Jemperli cancer-drug agreement, preserving Anaptys’ royalty rates. The ruling comes days before GSK’s first-quarter results, with Jemperli sales under scrutiny. Jemperli generated $1.128 billion in 2025 sales, according to Anaptys. The FDA expanded Jemperli’s use in endometrial cancer in 2024.