Activist investor Starboard Value has acquired a $1 billion stake in Pfizer to push for strategic changes in the U.S.

Activist investor Starboard Value is looking to shake up pharma giant Pfizer's sagging stock price.

Starboard Value has its next target: pharma giant Pfizer. The activist investor has informed Pfizer that it has taken a ...

Activist investor Starboard Value has taken a $1 billion stake in beleaguered drugmaker Pfizer Inc. and is seeking a turnaround, the Wall Street Journal reported late Sunday. Citing unnamed sources ...