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As of Q4'25 (2026-01-03), ONTO's EV/EBITDA ratio reached a dramatic high of 590.61, representing a significant spike compared to previous quarters. This sharp increase stands out as an outlier in the recent data, following a value of 23.67 in Q3'25. From Q1'23 to Q4'25, the EV/EBITDA ratio exhibited considerable volatility. The metric climbed steadily from 13.53 in Q1'23 to a peak of 46.18 in Q1'24, before fluctuating between 15.45 and 35.60 through Q3'25. The sudden surge to 590.61 in Q4'25 marks a notable deviation from prior trends, suggesting either a one-time event or a significant change in the company's valuation or earnings during that period.