In the latest reported period of Q2'26, Costco (COST) recorded a ROS of 3.96%, reflecting a slight sequential improvement from the previous quarter. However, data for the subsequent period, Q3'26, is currently no data. The chart illustrates a stable yet slightly fluctuating trend in ROS from Q4'23 to Q2'26, with values consistently maintained within the 3.71% to 4.14% range. A notable peak occurred in Q3'25 at 4.14%, followed by a period of normalization, though the overall trajectory remains resilient despite minor quarterly variances.