Thermo Fisher Scientificvs.Waters Corporation
TMO vs WAT · both in Life science tools, part of the Medicine, pharma & life science value chain: Instruments, reagents and equipment for research, development and production.
Thermo Fisher Scientific is about 5.7× larger than Waters Corporation by market cap; Thermo Fisher Scientific trades at the lower P/E (34.0 vs 250.7).
Side by side
| TMO | WAT | |
|---|---|---|
| Market cap | $237B | $41.6B |
| Price | $651.98 | $429.13 |
| Today | −1.5% | −1.6% |
| Return YTD | +14.3% | +14.8% |
| Return 1Y | +22.8% | +37.0% |
| Since June 26, 2026 | +27.1% | +14.6% |
| P/E | 34.0 | 250.7 |
| P/S | 5.1 | 9.0 |
| P/B | 4.5 | 2.7 |
Data as of 2026-10-08 · updates daily after U.S. close
Since June 26, 2026: the change in the closing price, from the daily closes Sectivia records itself since that date.
The two companies
Thermo Fisher ScientificTMO
Analytical instruments on one side, the reagents and consumables that feed them on the other, sold to research laboratories and pharmaceutical companies. Patheon, its contract manufacturing arm, makes drugs for customers outright.
Full TMO profile →Waters CorporationWAT
Waters sells liquid chromatography and mass spectrometry systems; pharmaceutical companies and other laboratories buy them along with the consumables and software that keep them running.
Full WAT profile →More TMO & WAT comparisons
Other head-to-heads in the Life science tools segment.