A Pfizer research facility is shown in the La Jolla neighborhood of San Diego, California, U.S., September 30, 2025. REUTERS/Mike Blake

(Reuters) -Pfizer is preparing to sweeten its offer again for Metsera, the Wall Street Journal reported on Wednesday, citing people familiar with the matter.

(Reporting by Kamal Choudhury in Bengaluru; Editing by Sriraj Kalluvila)