Quest Diagnostics vs Thermo Fisher Scientific: Fair Value & Quality
Both stocks run through our valuation models. Here is how Quest Diagnostics (DGX) and Thermo Fisher Scientific (TMO) compare, as of Aug 8, 2026.
Head-to-head numbers
Green value = the better side for that row (for valuation multiples: lower = cheaper).
Quest Diagnostics leads: 10 to 4 metric wins.
Dash = not meaningfully computable, for example with negative equity.
Quality in detail
The quality score, broken down into the same factor families as on the stock page, 0 to 100 per family.
What the models say
The median fair value (base case) per model family, each in the currency of its trading venue. Green = above the current price, red = below.
Quest Diagnostics
25 of 25 models see the stock below the current price.
Thermo Fisher Scientific
24 of 24 models see the stock below the current price.
Scenario ranges
From our cautious bear case to the optimistic bull case. The white tick is the current price: left of fair value means room to run.
Compare two other stocks
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Ranked within their sector
Where each stock sits within its sector peer group. Band = middle 50% of peers, tick = median, dot = this stock.
Quest Diagnostics · Health Care
Thermo Fisher Scientific · Health Care
Bottom line
As of Aug 8, 2026, Fair Value Calculator sees Quest Diagnostics as the less overvalued of the two: Quest Diagnostics trades at $239 versus a fair value of $164 (-31%), while Thermo Fisher Scientific trades at $580 versus $308 (-47%).
Quest Diagnostics has the higher quality score (71/100).
See the full analysis →More comparisons
Popular match-ups from the same sectors, all with fair value and quality score.
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A model-based valuation snapshot from 21 models. Values change with price and fundamentals; the date shown above applies.