Thermo Fisher Scientific stock heads into the open after a 0.51 percent gain

Thermo Fisher Scientific stock closed at USD 654.78 on the NYSE on September 21, 2026, up 0.51 percent from the prior close. The gain lagged the S&P 500, which rose 1.49 percent to 7,764.70 during the same session.

Thermo Fisher Scientific Inc. (ISIN US8835561023, NYSE: TMO) traded at USD 654.78 in the last completed session. The broader market advance was led by technology and AI-related shares, with the Nasdaq Composite adding 2.26 percent to 27,122.09, according to LiveMint.

A company-related development also emerged on September 21, 2026. MedTech Dive reported that Thermo Fisher and Mayo Clinic founded Precure, with Thermo Fisher providing proteomics and mass spectrometry expertise.

September 21, 2026 session recap

The stock finished at USD 654.78 on the NYSE, while the S&P 500 closed at 7,764.70, a 1.49 percent gain. Thermo Fisher's 0.51 percent advance therefore trailed the reference index by 0.98 percentage points.

The session followed a broad US equity rebound. Newstimes reported that the Nasdaq Composite gained 2.26 percent and the Dow Jones Industrial Average rose 0.7 percent on September 21, 2026.

September 22, 2026 outlook

The Precure partnership remains a dated company-specific item for September 22, 2026, after its announcement was reported the previous session. Broader sentiment may remain relevant because Thermo Fisher participated in a market session in which the S&P 500 rose 1.49 percent and technology shares led gains.