Pfizer (PFE) Stock After Hours on December 9, 2025: Obesity Pill Deal, RSV Questions, and What to Watch Before the Opening Bell
Pfizer shares closed down 1.7% at $25.33 on December 9, 2025, with volume below average. After hours, the stock edged up to $25.40 as investors reacted to Pfizer’s new global licensing deal with YaoPharma for an early-stage oral obesity drug. The agreement includes a $150 million upfront payment and potential milestones up to $2.1 billion.