Large-cap, mid-cap and small-cap

Companies are often grouped into size categories based on market capitalisation, the total value of all their shares. Large-cap companies are generally worth ten billion dollars or more, mid-cap companies fall roughly between two and ten billion, and small-cap companies are generally worth under two billion, though the exact cutoffs vary by source.

These categories complement mega cap, which the site already covers separately for the very largest companies. In general, larger companies tend to be more established and less volatile, while smaller companies carry more growth potential alongside more risk, less analyst coverage, and often less trading liquidity.