02/08/2026 AstraZeneca and Bristol Myers Squibb Explore $400B Mega-Merger AstraZeneca and Bristol Myers Squibb Explore $400B Mega-Merger (Ref) AstraZeneca and Bristol Myers Squibb are engaged in discussions over a potential $400 billion merger, which would rank among the largest corporate deals in history Strategic Context: Bristol Myers has pursued aggressive acquisitions in the past, notably Medarex, which expanded its oncology pipeline AstraZeneca’s valuation has surged un