Activist investor Starboard has informed Pfizer it has taken a stake Business InsiderWatch Starboard Value Take $1 Billion Stake in Pfizer BloombergSubscribe to read Financial TimesAmid Pfizer's Struggles With Declining Demand For COVID-19 Treatments, Activist Investor Starboard Value Invests $1B In Pharma Giant: Report - Pfizer (NYSE:PFE) Benzinga