AutoZone's Continued Investments in Its Distribution Should Drive Further Commercial Share Gains

In the aftermarket auto-parts industry, wide-moat AutoZone differentiates its retail operations by offering robust customer service to its do-it-yourself (68% of fiscal 2025 US sales) and commercial customers (32%) while maintaining ample parts availability across a wide range of vehicle makes and models. Given that about 85% of AutoZone's sales are composed of failure- and maintenance-related products that tend to be time-sensitive and vital to the functioning of a vehicle (such as alternators, batteries, and spark plugs), AutoZone's customer base typically values service quality and convenience over a lower price. The retailer's staff often assists customers with the diagnosis of a vehicle, ordering the necessary part for a specific vehicle's make and model, and in some instances, even replacing and testing the functionality of parts. While online channels (like Amazon and CarParts.com) and diversified retailers (such as Walmart) may offer ostensibly lower prices, AutoZone's consistent comparable-store sales growth and healthy gross margins (north of 50%) suggest that its focus on customer service and the convenience provided by its 6,666 domestic brick-and-mortar stores (as of the end of its fiscal first quarter 2026) is a winning formula in the category.