As of Q4'25 (2026-01-03), ONTO's diluted EPS stands at 0.21 USD, marking a significant decrease from the previous quarter's 0.57 USD. The latest year-over-year EPS growth rate is -78.6%, indicating a sharp contraction compared to earlier periods. Over the period from Q1'23 to Q4'25, ONTO's diluted EPS exhibited considerable volatility, with notable peaks in Q1'25 (1.3 USD) and Q2-Q3'24 (1.07 USD each), followed by a pronounced decline in the latter half of 2025. After strong positive EPS growth in 2024, the trend reversed in 2025, with negative year-over-year growth rates intensifying through Q3 and Q4'25, reflecting a shift from recovery to contraction in earnings performance.