Mega Cap
Diagnostics & Research
Stocks Ranked by
Market Capitalization
| Name | Market cap | Price |
Price change % |
|
|---|---|---|---|---|
1
Thermo Fisher Scientific
TMO
$225B
| $225B | $609.82 | 1.1% |
|
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 $225B.
The largest by market cap is Thermo Fisher Scientific (TMO) at $225B.
Among institutional investors, Thermo Fisher Scientific (TMO) drew the most net new fund positions in Q2 2026: 201 funds opened new positions, taking total fund holders up 12 (0.46%) quarter-over-quarter.
- Combined market cap: $225B across 1 stock.
- Mega Cap: market cap over $200B.
- Largest constituent: Thermo Fisher Scientific (TMO), $225B market cap.
- Most net new fund positions in Q2 2026: Thermo Fisher Scientific (TMO), +12 holders.
Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.