Siemens Healthineers AG became the latest company to sign a licensing agreement with Alzpath Inc. to use its pTau217 antibody in the development of a blood-based diagnostic assay for Alzheimer's disease. Alzpath previously signed deals with the likes of Roche AG and Beckman Coulter Diagnostics Inc. to use its pTau217 antibody to create diagnostic tests based for early detection and monitoring of Alzheimer's.

ADEL Inc. closed a year-end licensing deal worth up to $1.04 billion with Sanofi SA for ADEL-Y01, a specific tau-targeting Alzheimer’s disease drug candidate in a U.S. phase I study.

Two large deals and an acquisition, totaling about $4.64 billion in all, are helping wrap up what’s turning out to be a strong year. Through the first 11 months of 2025, biopharma dealmaking was robust with a collective value of $261.14 billion, the highest January through November total of the past seven years and well above 2024’s $201.35 billion. These three December deals helped revive the surge in dealmaking that had cooled in November.