As of Q4'25 (2026-01-03), ONTO reported R&D Expenses of USD 36.16M and SG&A Expenses of USD 51.57M, marking the highest levels for both categories within the period covered. This latest quarter reflects a notable increase in operating expenses compared to prior quarters. From Q1'23 to Q4'25, both R&D and SG&A Expenses have generally trended upward, with some fluctuations. R&D Expenses remained relatively stable through 2023 and early 2024, but began to rise sharply from Q4'24 onward. SG&A Expenses also showed moderate growth until a significant jump in Q4'25. The overall trend indicates increasing investment in both research and administrative functions, with Q4'25 representing a clear inflection point for heightened operating expenditure.