Bristol Myers Squibb appoints Cristian Massacesi as CMO; Samit Hirawat departs by Nov 1

BRISTOL MYERS SQUIBB CO

Cristian Massacesi, M.D., named EVP, Chief Medical Officer and Head of Development, effective August 1, 2025.
Samit Hirawat, M.D., steps down as CMO and Head of Development on August 1; will remain advisor through November 1, 2025.
Massacesi will oversee early- and late-stage development across all therapeutic areas and serve on Executive Leadership Team.
Hirawat leaves after six years; company cites his role in advancing pipeline across oncology, hematology, immunology, cardiovascular, neuroscience.

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