Pre-market price movements and significant market activity for Thermo Fisher Scientific, Inc. ($TMO). Each move is flagged by Z-score statistical significance — showing when $TMO moved beyond its typical daily range. 3 significant moves detected in the last 30 days.
Current Market State
What May Be Driving TMO?
-2.79% statistical outlier (Z: -2.50) driven by broader Healthcare sentiment without specific news catalyst.
Thermo Fisher Scientific, Inc. operates in the Healthcare sector, specifically Diagnostics & Research. Sector-wide movement can contribute to individual stock volatility.
Recent Unusual Moves (30 days)
| Date | Session | Price | Move | Z-Score | Rel. Vol. |
|---|---|---|---|---|---|
| Oct 1, 2026 | Regular | $658.78 | -2.41% | -2.22 | 0.8× |
| Sep 15, 2026 | Regular | $638.86 | +4.11% | 2.62 | 1.1× |
| Sep 15, 2026 | After-hours | $641.00 | +4.46% | 2.84 | 1.8× |
About TMO Premarket Movers
This page tracks unusual market activity for Thermo Fisher Scientific, Inc. (TMO) across all trading sessions — pre-market (4:00 AM–9:30 AM ET), regular hours (9:30 AM–4:00 PM ET), and after-hours (4:00 PM–8:00 PM ET). A move is flagged as "unusual" when its Z-score reaches 2 or higher, meaning the price change is statistically significant relative to TMO's recent daily volatility.
Z-score is calculated by comparing each move to the 20-day average return and standard deviation. A Z-score of 2.0 means the move is 2 standard deviations beyond the average — occurring in roughly the top 5% of daily moves. Relative volume (RVOL) compares current volume to the 20-day average volume at the same time of day, helping distinguish genuine institutional activity from noise.