We are live on ! Find out more

Mega Cap
Diagnostics & Research
Stocks Ranked by
Market Capitalization

Name Market cap Price Price
change %
TMO icon
1
Thermo Fisher Scientific
TMO
$211B
$211B $568.26 0.71%

Mega Cap Diagnostics & Research Stocks at a Glance

Diagnostics and research companies run laboratory testing, imaging, and analytical services, and supply the instruments behind them. Testing volumes are recurring and largely non-discretionary, while research-tools demand follows pharma and academic R&D budgets.

There is 1 mega cap Diagnostics & Research stock — a company in the Diagnostics & Research industry with a market cap over $200B — worth a combined $211B.

The largest by market cap is Thermo Fisher Scientific (TMO) at $211B.

Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q1 2026.