O'Reilly (ORLY) Q3 2026: Pro Share Gains Continue, Margin Lift Is One-Time

O'Reilly Automotive (ORLY) reported third-quarter 2026 results on October 28, 2026, for the quarter ended September 30, and held its earnings call the next day. Sales beat the company's expectations, but most of the margin improvement came from a one-time tariff refund and from spreading costs over higher sales [1][2].

Going into the report, four questions mattered: whether professional-customer share gains could continue as the tariff-driven price benefit faded, whether comparable sales could hold up while DIY traffic declined, whether margins could expand despite cost inflation, and whether free cash flow could support debt-funded buybacks. Professional sales grew 12.7% and professional transaction counts grew at a mid-single-digit rate, which confirms continued share gains [1][2]. Comparable store sales rose 7.2% and DIY sales rose 6.2%, but same-SKU inflation was slightly over 4%, about twice the roughly 2% the company expected in July, and DIY traffic was still falling [2][3]. Excluding the refund, margins were roughly flat year over year. The company raised its cash flow guidance, but buybacks ran at about twice free cash flow and leverage rose to 2.26 times [1][2]. The growth engine looks stronger, while margins and buybacks now depend more on high comparable sales and on borrowing.

O'Reilly is one of North America's largest auto parts retailers, and do-it-yourself (DIY) car owners and professional repair shops each account for about half of its sales [4]. The company uses distribution centers and hub stores to deliver parts to stores several times a day, and it wins repair-shop orders through parts availability [5]. It buys from more than 655 suppliers [6], and at the end of the third quarter its accounts payable equaled 121.8% of inventory [1].

Progress: professional share gains continued

O'Reilly's professional business kept growing at a double-digit rate. Third-quarter sales to professional customers were $2.60 billion, up 12.7% year over year, and reached 50.8% of total sales, compared with 49.0% a year earlier [1]. Management said professional comparable sales grew slightly over 10%, split evenly between higher average ticket and more transactions, with mid-single-digit growth in ticket counts that it attributed to broad-based share gains [2].

Transaction counts reflect how often repair shops actually place orders, so they are the key evidence of share gains. Professional sales rose by about $293 million, roughly 70% of the total sales increase [1]. Inflation was higher than previously assumed, so the average ticket also received more price support. The company expects inflation of about 2.5% to 3% in the fourth quarter, which will give a clearer test of whether professional sales can keep growing near 10% [2].

Change one: the margin gain came from a one-time refund, and store costs did not slow

O'Reilly's third-quarter margin expansion came mainly from a one-time tariff refund. Gross margin was 52.4%, compared with 51.9% a year earlier, and operating margin was 21.4%, compared with 20.7% [1]. A $39 million tariff refund, passed through by suppliers, added about 76 basis points to gross margin; management said that excluding it, gross margin was at the bottom of its expected range [2]. On that basis, gross margin was about 51.6% and operating margin about 20.7% excluding the refund, roughly in line with the prior-year quarter.

Petroleum-based products were the main pressure on gross margin. Higher prices for motor oil and similar products added about 1 percentage point to comparable sales, but these categories carry lower margins and retail prices lagged cost increases, together reducing gross margin by about 40 basis points [2].

SG&A per store did not slow as the company had expected. In July, O'Reilly expected full-year SG&A per store growth of 3.5% to 4% [3]; third-quarter growth was 4.8%, and the full-year outlook was raised to 4.5% to 5% [2]. Management attributed the overrun to extra store staffing and incentive pay to support higher sales volumes, as well as fuel, medical and self-insurance costs [2]. SG&A as a share of sales still fell 16 basis points, because 7.2% comparable sales growth spread costs over more revenue [2].

This changes what drives O'Reilly's margins. Excluding the refund, third-quarter operating income was about $1.059 billion, up about 8.5%, close to sales growth of 8.8% [1]. The company raised its full-year gross margin guidance to 51.6% to 52.1% and its operating margin guidance to 19.5% to 20.0%, and said fourth-quarter gross margin will be lower than in the third quarter [1][2]. Holding margins now depends more on comparable sales growth; if comparable sales slow, the cost-spreading benefit will weaken. The size of any further tariff refunds is still under negotiation with suppliers [2].

Conclusion

The third-quarter report strengthens the case for O'Reilly's growth engine while making margin expansion less certain. Transaction counts support the professional share gains, and the company raised its full-year comparable sales guidance from 4% to 6% to 5.5% to 6.5% [7][1]. Price contributed more to growth than expected, and margins were flat excluding the one-time refund. Free cash flow for the first nine months was $1.73 billion, and full-year guidance was raised to $1.9 billion to $2.2 billion; buybacks over the same period totaled $3.47 billion, third-quarter interest expense rose 37%, and a substantial part of the 14% increase in earnings per share came from a lower share count [1]. The next tests are whether fourth-quarter professional transaction counts keep growing at a mid-single-digit rate, whether full-year margins land within the new guidance, and whether SG&A per store growth stays within 5%.

Sources

[1] ORLY 8-K filed 2026-10-28 · Q3 2026 results release (October 28, 2026, O'Reilly Automotive Form 8-K Exhibit 99.1, third-quarter results press release, https://www.sec.gov/Archives/edgar/data/898173/000089817326000050/orly-ex99d1.htm) [2] ORLY Q3 2026 earnings call 2026-10-29 (October 29, 2026, O'Reilly Automotive third-quarter 2026 earnings call) [3] ORLY Q2 2026 earnings call 2026-07-30 · guidance and inflation outlook (July 30, 2026, O'Reilly Automotive second-quarter 2026 earnings call, https://www.theglobeandmail.com/investing/markets/stocks/ORLY/pressreleases/3730099/oreilly-automotive-orly-q2-2026-earnings-call-transcript/) [4] ORLY 10-K filed 2026-02-27 · dual market strategy and DIY/professional mix (February 27, 2026, O'Reilly Automotive Form 10-K, https://www.sec.gov/Archives/edgar/data/898173/000089817326000009/) [5] ORLY 10-K filed 2026-02-27 · tiered distribution network (February 27, 2026, O'Reilly Automotive Form 10-K, https://www.sec.gov/Archives/edgar/data/898173/000089817326000009/) [6] ORLY 10-K filed 2026-02-27 · products and purchasing (February 27, 2026, O'Reilly Automotive Form 10-K, https://www.sec.gov/Archives/edgar/data/898173/000089817326000009/) [7] ORLY 8-K filed 2026-07-29 · updated full-year 2026 guidance (July 29, 2026, O'Reilly Automotive Form 8-K, second-quarter results press release, https://www.sec.gov/Archives/edgar/data/0000898173/000089817326000042/orly-20260729xex99d1.htm)