O’Reilly Gears Up for Q3 on Oct. 28: Can DIFM Growth Outrun a Heavy $10B Acquisition Overhang?

O'Reilly Automotive is set to announce its third-quarter results on October 28, with investors keenly observing the company's performance amidst strong professional sales and speculation surrounding a potential $10 billion acquisition. The question remains whether the growth in professional sales will outweigh concerns related to this acquisition rumor.

As of now, O'Reilly Automotive (NASDAQ:ORLY) has seen its stock decline by 1.41% year to date, despite the positive momentum in professional demand that characterized the first half of the year. The company’s shares closed at $89.92 on October 23, reflecting an 8.5% decrease over the past year, even as they gained 4.68% in the last month.

In the previous quarter, O'Reilly reported earnings per share (EPS) of $0.86 and revenue of $4.89 billion, marking an 8.1% increase compared to the previous year. The results exceeded analysts' expectations, with comparable store sales increasing by 6.0%. Notably, professional sales saw a robust growth of 10%, marking the fourth consecutive quarter of double-digit increases in this segment. However, the do-it-yourself (DIY) segment showed weakness, with comparable sales rising only in the low single digits and transaction counts declining, partly due to a slowdown in hot-weather categories. The company also reported a significant increase in free cash flow, which surged by 51.9% to reach $692.7 million.

Following these results, O'Reilly raised its full-year comparable sales guidance to between 4% and 6%, up from a previous estimate of 3% to 5%. The EPS guidance was also increased to a range of $3.20 to $3.30.

Looking ahead, Wall Street is anticipating high-single-digit growth in EPS for O'Reilly. Investors will closely monitor professional sales, which reached $2.47 billion in the second quarter, compared to $2.31 billion in the same quarter last year. Achieving double-digit growth in professional sales against this base would signal that O'Reilly is successfully gaining market share.

Pricing challenges are expected to be a factor moving forward, as same-SKU inflation was reported at 5.5% in the second quarter. Management predicts that this will ease to between 1% and 2% in the latter half of the year, with Q3 expected to be at the higher end of that range. The company is also facing uneven comparisons against last year’s 5.6% comparable sales increase.

Investors will also be examining the company's margins closely. O'Reilly reported an operating margin of 20.7% in the third quarter of 2025 and has provided full-year guidance of 19.3% to 19.8%. Additionally, selling, general, and administrative (SG&A) expenses per store increased by 4.8% in the second quarter, prompting a tightening of the full-year outlook to between 3.5% and 4%.

Market speculation regarding a potential $10 billion acquisition of NAPA, the parts division of Genuine Parts (NYSE:GPC), has raised concerns about integration costs and the impact on O'Reilly's balance sheet. In July, CEO Brad Beckham emphasized that the company has "no expectation or intention of executing a large transformative acquisition in the foreseeable future," and investors hope to hear similar reassurances in the upcoming earnings call.

Leverage is also a critical factor, with adjusted debt-to-EBITDAR reported at 2.17x, compared to a target of 2.5x. Notably, O'Reilly executed $632 million in share buybacks in July alone.

Despite having exceeded EPS estimates in the last two quarters, O'Reilly's shares fell by 3.61% on the day of the Q2 earnings release, indicating a mixed reaction to its performance. Beckham noted that the company holds approximately 10% of the North American market and intends to focus on organic growth. If professional sales continue to perform well as inflation subsides and acquisition discussions are put to rest, O'Reilly may regain control over its narrative moving forward.