Shares of AnaptysBio fell 14% in premarket trading on Friday after the U.S. drug developer and Tesaro, a unit of Britain's GSK , filed lawsuits against each other, with both claiming a breach in a partnership deal for a cancer drug.
SAN DIEGO, Nov. 21, 2025 (GLOBE NEWSWIRE) -- AnaptysBio, Inc. (Nasdaq: ANAB), a clinical-stage biotechnology company focused on delivering innovative immunology therapeutics, today announced that its Board of Directors has authorized an amended Stock Repurchase Plan under which the Company may repurchase up to $100.0 million of the Company's outstanding common stock, par value $0.001 per share....
SAN DIEGO, Nov. 21, 2025 (GLOBE NEWSWIRE) -- AnaptysBio, Inc. (Nasdaq: ANAB), a clinical-stage biotechnology company focused on delivering innovative immunology therapeutics, announced it has filed a Verified Complaint in Delaware Chancery Court, requesting a court declaration that TESARO, Inc. (“Tesaro”) has materially breached the parties' Collaboration and Exclusive License Agreement (“Colla...
GSK PLC (LSE:GSK, NYSE:GSK) has stepped up a dispute over rights to its fast-growing cancer drug Jemperli by having its US subsidiary Tesaro sue AnaptysBio in the Delaware Court of Chancery. Tesaro is asking the court to confirm that alleged breaches of their 2014 licence deal allow it to end the current contract, keep a perpetual licence to the medicine and cut by half the royalty and mileston...
AnaptysBio receives a "Hold" rating after discontinuing rosnilimab for ulcerative colitis, saving $10 million but maintaining focus on rheumatoid arthritis. ANAB plans to advance rosnilimab for RA, with a program update expected in the first half of 2026, seeking non-dilutive funding or a strategic partner. Development of CD122 antagonist ANB033 for Celiac Disease continues in phase 1b, targeti...
AnaptysBio stock plummeted Monday, reversing a recent run, after its experimental ulcerative colitis drug failed in midstage testing.
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