QTRX vs BIO vs TMO vs DHR

For growth investors, Thermo Fisher Scientific Inc.

(TMO) is the stronger pick with 3. 9% revenue growth year-over-year, versus 0. 7% for Bio-Rad Laboratories, Inc. (BIO). Bio-Rad Laboratories, Inc. (BIO) offers the better valuation at 9. 2x trailing P/E (25. 0x forward), making it the more compelling value choice. Analysts rate Quanterix Corporation (QTRX) a "Buy" — based on 10 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, Bio-Rad Laboratories, Inc.

(BIO) is the cheapest at 9. 2x versus Danaher Corporation at 34. 9x. On forward P/E, Thermo Fisher Scientific Inc. is actually cheaper at 19. 1x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Thermo Fisher Scientific Inc. wins at 9. 05x versus Danaher Corporation's 34. 35x.

Over the past 5 years, Thermo Fisher Scientific Inc.

(TMO) delivered a total return of +2. 8%, compared to -95. 1% for Quanterix Corporation (QTRX). Over 10 years, the gap is even starker: TMO returned +229. 1% versus QTRX's -84. 3%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), Bio-Rad Laboratories, Inc.

(BIO) is the lower-risk stock at 0. 92β versus Quanterix Corporation's 1. 98β — meaning QTRX is approximately 114% more volatile than BIO relative to the S&P 500. On balance sheet safety, Quanterix Corporation (QTRX) carries a lower debt/equity ratio of 13% versus 76% for Thermo Fisher Scientific Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Thermo Fisher Scientific Inc.

(TMO) is pulling ahead at 3. 9% versus 0. 7% for Bio-Rad Laboratories, Inc. (BIO). On earnings-per-share growth, the picture is similar: Bio-Rad Laboratories, Inc. grew EPS 142. 6% year-over-year, compared to -151. 0% for Quanterix Corporation. Over a 3-year CAGR, QTRX leads at 9. 6% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Bio-Rad Laboratories, Inc.

(BIO) is the more profitable company, earning 29. 4% net margin versus -77. 1% for Quanterix Corporation — meaning it keeps 29. 4% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: DHR leads at 20. 9% versus -62. 9% for QTRX. At the gross margin level — before operating expenses — DHR leads at 60. 9%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Thermo Fisher Scientific Inc. (TMO) is the more undervalued stock at a PEG of 9. 05x versus Danaher Corporation's 34. 35x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, Thermo Fisher Scientific Inc. (TMO) trades at 19. 1x forward P/E versus 25. 0x for Bio-Rad Laboratories, Inc. — 5. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for QTRX: 45. 5% to $4. 00.

In this comparison, DHR (0.

7% yield), TMO (0. 4% yield) pay a dividend. QTRX, BIO do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Danaher Corporation (DHR) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

94), 0. 7% yield, +219. 3% 10Y return). Quanterix Corporation (QTRX) carries a higher beta of 1. 98 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (DHR: +219. 3%, QTRX: -84. 3%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: QTRX is a small-cap quality compounder stock; BIO is a small-cap deep-value stock; TMO is a mid-cap quality compounder stock; DHR is a mid-cap quality compounder stock. DHR pays a dividend while QTRX, BIO, TMO do not, making them suitable for different income and tax situations. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.