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Auto Parts
Stocks Ranked by
Market Capitalization

Auto Parts Stocks at a Glance

Auto parts companies make components, tires, and accessories for vehicle production and the replacement market. Aftermarket demand is steadier than new-car build rates, so the mix between supplying automakers and repair channels shapes each company's cyclicality.

There are 58 Auto Parts industry stocks tracked by Wall St. Rank, worth a combined $304B.

The largest by market cap are O'Reilly Automotive (ORLY) at $76.9B, AutoZone (AZO) at $51.2B and Magna International (MGA) at $18.7B.

Among institutional investors, Modine Manufacturing (MOD) drew the most net new fund positions in Q1 2026: 124 funds opened new positions, taking total fund holders up 51 (10%) quarter-over-quarter.

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