The Costco Q3 setup we previewed Wednesday was unusually narrow: the comp number would move the stock, but the membership renewal rate and digital comp velocity were what would tell you whether the 56x multiple was defensible. Thursday's print delivered on both.
Costco reported fiscal third-quarter net sales of $69.15 billion, up 11.6% from $62 billion a year ago, with net income of $2.19 billion, or $4.93 per diluted share, versus $4.28 in the prior-year period. CNBC's coverage frames the quarter as a clean beat across revenue and EPS, with the stock dipping modestly after-hours not because of the print itself but because the multiple already prices in this kind of result.
The comp story is where the texture is. Total comparable sales rose 9.8%, but stripped of gas-price inflation and currency, the underlying comp was 6.6% — still well ahead of every other major broadline retailer that has reported this quarter. More important: digitally enabled comparable sales grew 21.5%, or 20.8% on an FX-neutral basis, according to the Q3 earnings call transcript. That's accelerating from prior quarters and confirms that Costco's curbside, app-driven and same-day delivery investments are starting to pull through in a way the consensus model wasn't fully capturing.
The membership flywheel kept turning. Paid executive memberships reached 41.2 million, up 9.6% year-over-year, and total paid members hit 82.9 million, up 4.1%, per GuruFocus's call-highlights summary. Executive members now account for roughly half the paid base — that ratio has been climbing steadily for two years — and they spend more, renew at higher rates, and generate higher gross profit dollars per visit. The fact that this membership tier is still growing nearly 10% in a quarter where the Conference Board's confidence index hit a four-year low says something about the kind of consumer Costco is recruiting right now: one that is paying $130 a year up-front specifically to bypass the rest of the retail price ladder.
The gas business deserves its own sidebar. As Investing.com's transcript coverage noted, the final five weeks of the quarter became Costco's top-five fuel-volume weeks ever. Management attributed it directly to the gas-price surge that followed Iran's embargo on Strait of Hormuz oil shipments, with nationwide regular unleaded crossing $4.55 in late May. The pattern is classic Costco: when overall prices spike, more shoppers chase the warehouse-club gas discount, and once they're in the parking lot they buy a rotisserie chicken and a 12-pack of paper towels on the way out. The fuel beat is the dollar comp accelerator, but the operating-margin upside lives inside the box.
The strategic read for the broader retail group is that the value-share trade is still working and still concentrated. Dollar Tree's Q1 print on the same day showed a similar pattern — ticket up 4.5%, traffic down 1.0% — meaning a shrinking number of trips with bigger baskets. Burlington's print earlier in the week extended the off-price beat-and-raise. Walmart had already warned earlier in May that fuel and tariff pass-through would push second-half prices higher. Costco is the cleanest expression of the trade: a model whose gross margin is structurally low and whose membership fees turn the income statement into something closer to a SaaS business with a grocery store attached.
The one cautionary line in the TradingKey analysis is the valuation question — after-hours the stock barely moved on a clean beat, which says the buy-side already had this scenario priced in. The multiple now requires both the comp acceleration to continue and the membership growth to compound. Q3 delivered on both, but the bar for Q4 just moved up.
For the rest of the retail industry, the takeaway is sharper: the consumer is sorting itself into two stacks — one that pays a membership fee to opt out of inflation, and one that doesn't. Costco's results say the first stack is still adding people faster than anyone else can subtract them.