Strong Financial Performance: Costco reported a Q3 net income of $1.9 billion ($4.28 per diluted share), marking a 13% increase compared to the same quarter last year, driven by an 8% rise in net sales to $61.96 billion. U.S. comparable sales increased by 6.6%, indicating robust sales momentum despite a challenging macroeconomic environment.

Challenges with Inflation and Tariffs: The company faced a $130 million LIFO charge due to inflationary pressures, particularly in non-food items, and potential impacts from tariffs continue to be a concern. Forecasts suggest an additional LIFO charge of $40 to $50 million in Q4 if current inflation trends persist. Investors should monitor cost pressures that could affect margins.

Membership Growth and Renewal Rates: Costco's total paid members reached 79.6 million, up 6.8% YOY, with a notable increase in executive memberships (up 9%). However, U.S. and Canadian renewal rates declined slightly to 92.7% amid increased membership from digital channels, indicating a need to maintain engagement with new members for future retention.