As of Q3'25, ASML's ROS (Return on Sales) stands at 33.89%. This latest data point reflects a slight decrease from the previous two quarters, where ROS was above 35%. Over the period from Q1'23 to Q3'25, ASML's ROS has exhibited moderate fluctuations but generally remained within the 33% to 37% range. There was a notable dip in Q1'24 to 26.87%, followed by a recovery and steady improvement, peaking at 36.82% in Q4'24. The overall trend suggests resilience and a return to higher profitability levels after the temporary decline in early 2024.