QDEL vs BIO vs TMO vs HOLX vs DHR

For growth investors, Thermo Fisher Scientific Inc.

(TMO) is the stronger pick with 3. 9% revenue growth year-over-year, versus -1. 9% for QuidelOrtho Corporation (QDEL). 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 QuidelOrtho Corporation (QDEL) a "Buy" — based on 15 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, QuidelOrtho Corporation is actually cheaper at 6. 4x — 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, Hologic, Inc.

(HOLX) delivered a total return of +15. 8%, compared to -91. 1% for QuidelOrtho Corporation (QDEL). Over 10 years, the gap is even starker: TMO returned +229. 1% versus QDEL's -34. 9%. 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), Hologic, Inc.

(HOLX) is the lower-risk stock at 0. 41β versus QuidelOrtho Corporation's 2. 59β — meaning QDEL is approximately 530% more volatile than HOLX relative to the S&P 500. On balance sheet safety, Bio-Rad Laboratories, Inc. (BIO) carries a lower debt/equity ratio of 21% versus 146% for QuidelOrtho Corporation — 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 -1. 9% for QuidelOrtho Corporation (QDEL). On earnings-per-share growth, the picture is similar: Bio-Rad Laboratories, Inc. grew EPS 142. 6% year-over-year, compared to -25. 0% for Hologic, Inc.. Over a 3-year CAGR, TMO leads at -0. 3% 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 -41. 5% for QuidelOrtho 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 -33. 7% for QDEL. At the gross margin level — before operating expenses — HOLX leads at 61. 0%, 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, QuidelOrtho Corporation (QDEL) trades at 6. 4x forward P/E versus 25. 0x for Bio-Rad Laboratories, Inc. — 18. 6x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for QDEL: 57. 8% to $17. 00.

In this comparison, DHR (0.

7% yield), TMO (0. 4% yield) pay a dividend. QDEL, BIO, HOLX 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). QuidelOrtho Corporation (QDEL) carries a higher beta of 2. 59 — 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%, QDEL: -34. 9%), 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: QDEL is a small-cap quality compounder stock; BIO is a small-cap deep-value stock; TMO is a mid-cap quality compounder stock; HOLX is a mid-cap quality compounder stock; DHR is a mid-cap quality compounder stock. DHR pays a dividend while QDEL, BIO, TMO, HOLX 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.