Mega Cap
Diagnostics & Research
Stocks Ranked by
Market Capitalization
| Name | Market cap | Price |
Price change % |
|
|---|---|---|---|---|
1
Thermo Fisher Scientific
TMO
$262B
| $262B | $707.28 | 2.06% |
|
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 $262B.
The largest by market cap is Thermo Fisher Scientific (TMO) at $262B.
Among institutional investors, Thermo Fisher Scientific (TMO) drew the most net new fund positions in Q2 2026: 203 funds opened new positions, taking total fund holders up 21 (0.8%) quarter-over-quarter.
- Combined market cap: $262B across 1 stock.
- Mega Cap: market cap over $200B.
- Largest constituent: Thermo Fisher Scientific (TMO), $262B market cap.
- Most net new fund positions in Q2 2026: Thermo Fisher Scientific (TMO), +21 holders.
Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.