# Diagnostics & Research Stocks in the S&P 500

Every S&P 500 company classed as Diagnostics & Research: 12 of the 60 stocks in the Healthcare sector. Highest fundamentals score first.

**Quick answer:** S&P 500 Diagnostics & Research stocks: 12 (12 scored). Median score 51/100, below the S&P 500 median of 54. Strong (80+): 0. Weak (under 40): 2. Highest scores: Labcorp (65), Quest Diagnostics (63) and Idexx Laboratories (61). Market data as of 2 Nov 2026.

| Rank | Stock | Ticker | Score |
|---|---|---|---|
| 1 | [Labcorp](https://scoreyourstock.com/stocks/us/lh-labcorp) | LH | 65/100 |
| 2 | [Quest Diagnostics](https://scoreyourstock.com/stocks/us/dgx-quest-diagnostics) | DGX | 63/100 |
| 3 | [Idexx Laboratories](https://scoreyourstock.com/stocks/us/idxx-idexx-laboratories) | IDXX | 61/100 |
| 4 | [Agilent Technologies](https://scoreyourstock.com/stocks/us/a-agilent-technologies) | A | 57/100 |
| 5 | [Revvity](https://scoreyourstock.com/stocks/us/rvty-revvity) | RVTY | 54/100 |
| 6 | [Mettler Toledo](https://scoreyourstock.com/stocks/us/mtd-mettler-toledo) | MTD | 51/100 |
| 7 | [Thermo Fisher Scientific](https://scoreyourstock.com/stocks/us/tmo-thermo-fisher-scientific) | TMO | 51/100 |
| 8 | [Danaher](https://scoreyourstock.com/stocks/us/dhr-danaher) | DHR | 50/100 |
| 9 | [Illumina](https://scoreyourstock.com/stocks/us/ilmn-illumina) | ILMN | 48/100 |
| 10 | [IQVIA](https://scoreyourstock.com/stocks/us/iqv-iqvia) | IQV | 42/100 |
| 11 | [Waters](https://scoreyourstock.com/stocks/us/wat-waters) | WAT | 37/100 |
| 12 | [Charles River Laboratories](https://scoreyourstock.com/stocks/us/crl-charles-river-laboratories) | CRL | 24/100 |

## Common questions

### How many Diagnostics & Research stocks are in the S&P 500?

This site lists 12 S&P 500 stocks in the Diagnostics & Research sub-sector, part of the Healthcare sector. 12 of them have enough data for a score.

### Which Diagnostics & Research stock has the highest score?

As of this site's latest data, Labcorp Holdings Inc. Common Stock (LH) has the highest fundamentals score in Diagnostics & Research, at 65/100. Top three: Labcorp (65), Quest Diagnostics (63) and Idexx Laboratories (61).

### How do Diagnostics & Research stocks score compared with the rest of the S&P 500?

The median Diagnostics & Research stock scores 51/100, below the S&P 500 median of 54. Split: 0 strong, 10 okay, 2 weak. Its biggest lead over the market is Financial Safety: 69 vs 63 for the whole S&P 500. Its biggest shortfall is Price Fairness: 3 vs 21 for the whole S&P 500.

### Which Diagnostics & Research stock has the lowest score?

Charles River Laboratories International, Inc. Common Stock (CRL), at 24/100, the lowest of the 12 scored Diagnostics & Research stocks. Its stock page shows which measures pull it down. A score reads the latest published numbers, not a forecast.

### How is the score worked out?

Each stock gets 0-100 from five pillars: Business Strength, Financial Safety, Cash & Dividends, Price Fairness and Risk, built from its published financial statements and share price. Banks and REITs use their own cutoffs where normal rules would misjudge them. Full rules: https://scoreyourstock.com/how.

Full sortable page: https://scoreyourstock.com/stocks/us/sector/healthcare/diagnostics-research
Whole Healthcare sector: https://scoreyourstock.com/stocks/us/sector/healthcare