Pharmaceutical giant Pfizer (PFE) is seeing stock gains in Monday's pre-market trading after activist investor Starboard Value took up a $1 billion stake, according to a Wall Street Journal report.

Yahoo Finance senior health reporter Anjalee Khemlani covers Starboard's reported investment in Pfizer as the pharma company seeks to reposition itself coming out of the COVID-19 pandemic.

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This post was written by Luke Carberry Mogan.