The latest data point for ONTO's Operation Income in Q4'25 shows a decline to $13.86M USD, marking the lowest quarterly figure in the observed period and reflecting a significant YoY drop of -67.36%. From Q1'23 to Q4'25, Operation Income exhibited volatility with an initial downward trend from $29.04M USD in Q1'23 to a low of $24.81M USD in Q2'23, followed by recovery and peak growth to $63.13M USD in Q1'25, driven by strong YoY gains exceeding 47% in Q1'24 through Q4'24. However, the trend reversed sharply post-Q1'25, with consecutive declines to $23.69M USD in Q3'25 amid YoY contractions up to -67.36%, indicating potential market pressures or operational challenges in the semiconductor sector. Overall, the bar chart highlights a cyclical pattern, with YoY line trends underscoring robust expansion in 2024 before recent erosion.