Diagnostics: 16 stocks

These companies run medical tests, from blood work to cancer and genetic tests. Their sales follow test volumes and what insurers agree to pay.

As of Monday's close · Live for Pro members at the open

Diagnostics: 16 stocks
StockPriceQuality Score
13 more ranked, for Pro members. See them free →

Tested. Our top-⁠scored stocks returned 2.2x the average stock over the next month. How we tested it

We do the work for you. Every stock is scored and ranked, every 15 seconds while the market is open. Here it's 15 minutes behind. Pro members see it live, with prices that refresh every 2.5 seconds while the market is open.

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Why diagnostic stocks are up this week

Diagnostic stocks rose a median 4.6% from Oct 19 to Oct 26 (16 stocks); the S&P 500 fell 0.1%.

What moved them

  • No single story: 15 of 16 rose this week.

Up most

3 stocks' stories, for Pro members. See them free →

Questions about diagnostics

Why are diagnostic stocks up this week?

Diagnostic stocks rose a median 4.6% from Oct 19 to Oct 26 (16 stocks); the S&P 500 fell 0.1%. No single story: 15 of 16 rose this week.

Which diagnostic stocks rose most this week?

Celcuity (CELC) rose 15%, GRAIL (GRAL) rose 14%, and BillionToOne (BLLN) rose 10%.

What are the biggest companies in diagnostics?

The biggest by market cap are Natera (NTRA) at $58B, Quest Diagnostics (DGX) at $27B, and Labcorp Holdings (LH) at $27B.

Which companies in diagnostics does Breakaway rank highest?

Caris Life Sciences (CAI) 21, CareDx (CDNA) 19, and Natera (NTRA) 18, the highest Quality Scores of the 16. Breakaway ranks every stock by its Quality Score, which reads each company's numbers and its chart; the ranking is information, not advice, and each stock's page shows the reasons behind its score.

Our top-scored stocks' record: Oct 2021 to Sep 2026, before costs; recorded live since Sep 9 2026.

Breakaway publishes impersonal securities research and analytical tools: one formula, the same score for everyone. It is not personalized investment advice, and nothing here is a recommendation to buy or sell any security.

Market data from a licensed vendor. The age of every quote is shown on the page.

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