In Q1'26, ONTO's total operating expenses reached $87.97M USD, comprising $35.10M USD in R&D expenses and $52.87M USD in SG&A expenses, marking a slight decline of 3% from the previous quarter's $93.16M USD total. Over the period from Q2'23 to Q1'26, operating expenses exhibited an overall upward trend, rising from $61.83M USD to $87.97M USD, driven primarily by escalating SG&A costs that increased 52% amid expansions in sales and administrative functions, while R&D expenses grew more modestly by 30% with notable spikes in Q4'24 ($34.89M USD) and Q4'25 ($36.16M USD). The stacked bar chart highlights volatility, including a temporary dip in Q1'24 ($62.44M USD total) followed by consistent growth, suggesting heightened investments in operational scaling despite periodic fluctuations in R&D allocations.