Pfizer stock jumps nearly 4% — what’s driving PFE after the obesity-drug data drop
Pfizer shares rose 3.9% to $26.78 before holding steady after hours, following new data on its obesity drug PF-3944 and quarterly results. The company maintained its 2026 revenue and earnings outlook but warned of pricing pressures and upcoming patent expirations. Mid-stage trial data showed up to 12.3% weight loss at 28 weeks, with some patients dropping out due to side effects. Trading volume topped 80 million shares.