Thermo Fisher Scientific Stock (TMO) After Hours: Key News, Analyst Forecasts, and What to Watch Before the Market Opens on Dec. 19, 2025
Thermo Fisher Scientific Inc. (NYSE: TMO) finished Thursday’s session (December 18, 2025) essentially flat and is showing little urgency in post-market trading—setting up a “watch the catalysts” kind of setup heading into Friday’s open (December 19, 2025). The stock closed