O REILLY AUTOMOTIVE INC (ORLY) stock intrinsic value fair value estimate & owner earnings analysis

O'Reilly sells automotive replacement parts, tools and accessories through 6,585 stores (6,447 in 48 U.S. states and Puerto Rico, 112 in Mexico, 26 in Canada at the end of 2025), serving both do-it-yourself customers and professional repair shops. Demand is largely non-discretionary: when a car breaks it has to be fixed, and the U.S. fleet keeps getting older. The company's edge is its distribution network of regional centres and hub stores, which gets a hard-to-find part to a mechanic within hours. It has reported 33 consecutive years of record revenue and earnings and positive comparable-store sales since going public in 1993, including through 2008-2009 and the 2020 shutdown. How we measure earnings. We start from the cash the business generates after the spending needed to keep it running, strip out working-capital timing, charge stock compensation as a cost, and add back interest so that we value the whole business before lenders and then subtract what it owes. On that basis the business produced $2.04 to $2.31 billion a year over 2021-2025; we anchor on the middle of that range, about $2.15 billion, or roughly $2.59 per current share. We use five years because the business was reshaped after 2020 as weaker rivals retrenched and the share count fell by more than 40% over the decade. 2025 rose about 5% on 2024 in total dollars (8% per share), and operating cash flow in the first half of 2026 was $2.04 billion versus $1.51 billion a year earlier, largely the reversal of a 2025 timing item on the purchase of renewable-energy tax credits. The key accounting judgement. Capital spending climbed from $443M in 2021 to $1,169M in 2025 while revenue grew about a third, driven, per the 2025 annual report, by distribution enhancement and expansion projects and more owned new stores ($3.2-3.5M per owned store). Our method treats almost all of that as a cost of staying in business, which is the cautious reading. First-half 2026 spending ($552M) was slightly below the prior year ($588M), a first sign the step-up may be levelling off, but not yet evidence that it will fall. What it owes. At June 30, 2026 the company carried about $7.0 billion of senior notes and commercial paper against $262M of cash. Most of the notes carry fixed coupons between 1.75% and 5.75%, maturing in roughly $500M-$850M steps through 2034, which lowers the true burden somewhat; we count net debt at about $6.3 billion. Interest paid was $227M in 2025 against a business cash flow near $2.1 billion, so every case comfortably carries its debt. Base case (about $59 a share). The business grows cash flow around 5% a year for the first decade, coming from what it has proven it can repeat: 200-235 net new stores a year (207 in 2025, 225-235 planned for 2026) and low-single-digit comparable-store sales, tapering to 3% by year ten and 2% in years 11-20 as store additions slow, then holding flat. We credit no further margin expansion and no share gains. The business is worth about $55 billion; less $6.3 billion of debt leaves about $49 billion. Bear case (about $34). One downturn of the kind auto retail actually saw in 2008-2009 and 2020 (a roughly 10% then 5% hit to cash flow over two years as miles driven and discretionary maintenance fall, with tariff costs not fully passed through), then a partial recovery, slow 2% growth to year ten and a gradual decline thereafter as improving vehicle reliability and electric vehicles shrink the parts consumed per car. Heavy capital spending stays permanent. Business worth about $34 billion; less debt leaves about $28 billion. Bull case (about $100). The distribution and real-estate programme completes and spending falls back toward its long-run 4-5% of revenue, releasing roughly $300-450M a year from year three, while store openings and comparable sales continue at the recent pace and the Mexico and Canada operations follow the U.S. model. Business worth about $90 billion; less debt leaves about $83 billion. Margin of safety price: about $42. We are fairly sure of the earnings level: five years of business cash flow in a 13% band, and a three-decade record of growing through recessions. The worst plausible outcome is a slow, structural shrinkage of parts demand as electric vehicles take share, which no case fully captures but which would unfold over decades, not years; the balance sheet (debt about three times annual cash flow, staggered fixed-rate maturities, investment-grade funding) would survive a severe downturn without dilution. What we are most likely to be wrong about is whether the elevated capital spending is permanent and how fast electric vehicles erode the parts market; if both go against us the shares are worth roughly the bear figure. At $42 the business generates about 6% of the price in cash each year, all of which is returned through buybacks, plus about 5% growth; a return to the base value within about two years would imply close to 20% a year, and the bear case implies a moderate loss. That is why the margin-of-safety price is about $42 and not higher. What changed since our last review: the first-half 2026 results confirmed the 2025 cash-flow dip was timing, capital spending stopped rising, and the company issued about $850M of new notes while repaying the $500M 3.55% notes due March 2026 and buying back $2.4 billion of stock. Our values are essentially unchanged; the bull case is slightly lower and we no longer attach a separate capital-spending condition to the margin-of-safety price, since that risk is already carried in the bear case.