Thermo Fisher stock hits fresh 52-week high as volume jumps in late trade
New York, Jan 21, 2026, 19:34 EST — After-hours Thermo Fisher Scientific Inc shares climbed 2.8%, closing at $636.30 on Wednesday and hitting a new 52-week high. After hours, the stock barely moved following heavy volume earlier in the day. The S&P 500 advanced 1.16%, while the Dow added 1.21%. (MarketWatch) This move is significant as investors approach the upcoming quarterly reports with the stock already trading close to its peak. Traders will watch closely for any changes in biopharma spending and lab tool demand, the key drivers that typically push these shares up or down quickly. Shares in other