Grizzly Bulls
Financial research concept

Auto Parts Professional Sales

measure revenue from repair shops, service stations, fleets, dealers, and other professional customers that buy parts for installation or resale.

By Lee BaileyPublished Sep 29, 2026
Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date
Sep 29, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context
10 connected conceptsPart of the reviewed Auto Parts Retail Operating Economics; issuer definitions remain distinct where disclosed.
Company examples
2 reviewed companiesRelationships reflect supported examples, not a normalized cross-company KPI ranking.
  1. Professional demand depends on speed as well as assortment
  2. Professional and DIY sales should remain separate demand streams
  3. Part of the Auto Parts Retail Operating Economics
  4. See It in Company Research
  5. Continue Research

Auto parts professional sales measure revenue from repair shops, service stations, fleets, dealers, and other commercial customers.

O'Reilly reported $2.470B of Q2 2026 sales to professional service providers, up from $2.196B a year earlier. AutoZone reported $1.913B of domestic commercial sales in its 16-week fiscal Q4 2026.

Professional demand depends on speed as well as assortment

A repair shop can lose technician time when a required part is unavailable. Professional customers therefore place a premium on delivery speed, local inventory depth, and the ability to source uncommon parts quickly.

That connects professional sales directly to commercial-program coverage and the hub-store network.

Professional and DIY sales should remain separate demand streams

O'Reilly separately reports DIY sales, while AutoZone calls its professional channel commercial or do-it-for-me activity.

The categories answer a similar investor question but are not a standardized industry revenue taxonomy. Reporting periods also differ, so raw quarterly dollar amounts should not be ranked without aligning calendar length and scope.

Primary sources: O'Reilly Automotive Q2 2026 Form 10-Q and AutoZone fiscal 2026 fourth-quarter results.

Part of the Auto Parts Retail Operating Economics

Connect DIY and professional demand with commercial-service coverage, hub and distribution-center parts availability, inventory intensity and turnover, vendor funding, and store-level sales productivity.

Browse the full operating model in Company Analysis →
Where this concept fits
  • DIY, professional, and store productivityCurrent relationship
    DIY sales and professional sales separate the two main customer jobs served by the auto-parts store network. Sales per average store and sales per average square foot show how that customer mix converts into unit and space productivity without replacing comparable-store growth.
    DIY SalesProfessional SalesCurrent conceptSales per Average Square FootSales per Average Store
  • Commercial coverage and parts-availability network
    Commercial program count shows how much of the store base can directly serve professional accounts, while hub stores and distribution centers position broader assortments at different points in the replenishment network. The counts are architecture inputs, not standardized service-quality scores.
    Commercial Program CountDistribution Center CountHub Store Count
  • Inventory intensity, turnover, and vendor funding
    Inventory per store shows local working-capital intensity, inventory turnover shows how quickly cost of goods sold cycles through average inventory, and accounts payable to inventory shows how much supplier credit offsets the inventory balance. Together they frame the tradeoff between parts availability and capital efficiency.
    Accounts Payable to InventoryInventory per StoreInventory Turnover

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

Continue Research

Continue from the concept into the Grizzly Bulls research surface that best matches the next question. These links are research continuations, not recommendations or required steps.

Compare stocks

Compare professional auto-parts sales

Compare sales to repair shops and other professional customers while preserving each retailer's commercial program scope and reporting period.

Continue research

Explore more topics in the Financial Research Encyclopedia.