Pfizer tops earnings estimates, hikes full-year guidance as Covid products help sales CNBCPfizer Stock Rises After Earnings Beat, Guidance Hike Barron’sPfizer raises full-year guidance by $1.5 billion amid activist investor pressure Yahoo FinancePfizer’s Strong Quarter Bolsters CEO’s Comeback Efforts The Wall Street JournalPfizer profit up on COVID treatment sales as it faces activist pressure Reuters