Key Fourth Quarter Highlights • The Company added approximately 300,000 net digital-only subscribers compared with the end of the third quarter of 2023, fueled by bundle and multi-product subscriber additions • Total digital-only average revenue per user (“ARPU”) grew 3.5 percent year-over-year to $9.24 primarily as a result subscribers graduating from promotional to higher prices and price increases on tenured non-bundled subscribers • Higher digital subscribers and ARPU drove year-over-year growth in subscription revenues from digital products of 7.2 percent • Digital advertising revenues decreased 3.7 percent year-over-year largely as a result of the five fewer days in the fourth quarter of 2023 compared to 2022 as well as declines in revenue from our podcasts and creative services • Operating costs decreased 4.8 percent year-over-year and adjusted operating costs (defined below) decreased 0.7 percent, largely as a result of lower cost of revenue, partially offset by higher salesand marketing and product development costs • Operating profit of $129.0 million, a 38.7 percent increase year-over-year, with adjusted operating profit (defined below) of $154.0 million, an 8.5 percent increase year-over-year primarily as a result of higher digital subscription and other revenues as well as lower adjusted operating costs, partially offset by lower advertising revenues

*Total net revenues increased 7.5 percent, or $65.8 million, to $943.0 million, compared with $877.3 million in the prior year period. This revenue growth was on top of the 44.8 percent revenue growth reported in the Company’s 2021 fiscal second quarter. *Net income for the quarter was $88.5 million, or $1.34 per diluted share compared with net income of $113.7 million, or $1.71 per diluted share, in the prior year period, primarily reflecting significant year-over-year cost increases for inbound and outbound shipping, labor, and digital marketing. Adjusted net income1 for the quarter was $88.6 million, or $1.34 per diluted share, compared with adjusted net income1 of $114.2 million, or $1.72 per diluted share, in the prior year period.

Costco Wholesale Corporation reported net sales of $24.48 billion for the retail month of June, the five weeks ended July 7, 2024, an increase of 7.4 percent from $22.78 billion last year. Net sales for the first 44 weeks were $210.55 billion, an increase of 6.9 percent from $196.93 billion last year. The Company also announced that, effective September 1, 2024, it will increase annual membership fees by $5 for U.S. and Canada Gold Star (individual), Business, and Business add-on members. With this increase, all U.S. and Canada Gold Star, Business and Business add-on members will pay an annual fee of $65. Also effective September 1, annual fees for Executive Memberships in the U.S. and Canada will increase from $120 to $130 (Primary membership of $65, plus the Executive upgrade of $65), and the maximum annual 2% Reward associated with the Executive Membership will increase from $1,000 to $1,250. The fee increases will impact around 52 million memberships, a little over half of which are Executive.