Pfizer stock slips into holiday week as CEO filing, vaccine-policy row and biotech IPO news land
New York, January 17, 2026, 07:32 EST — Market closed. Shares of Pfizer Inc closed Friday down 0.9% at $25.65. Investors wrestled with a jumble of policy updates, regulatory filings, and a biotech IPO that dragged Pfizer’s name back into the paperwork spotlight.