As of Q1'26 (2025-11-23), Costco's latest operating income stands at USD 2.46B, reflecting a year-over-year growth rate of 12.16%. This marks a slight decrease from the previous quarter's peak of USD 3.34B in Q4'25, but maintains a strong positive growth trend compared to the same period last year. Over the period from Q2'23 to Q1'26, Costco's operating income has generally trended upward, with notable peaks in Q4 of each fiscal year—reaching USD 3.04B in Q4'24 and USD 3.34B in Q4'25. Year-over-year growth rates have remained consistently positive since Q4'23, with a significant spike of 30.85% in Q3'24. Despite some quarter-to-quarter volatility, the overall trend indicates robust and accelerating operational performance, especially in the most recent fiscal year.