MUMBAI : Corporate profits rose 15 per cent to touch an all-time high in the September quarter as margins widened on softer input costs and better utilistaion levels, the research arm of leading rating agency Crisil said on Monday.From an absolute perspective, the earnings before interest, tax, depreciation and amortisation (Ebitda) touched an “all-time high" ₹1.60 lakh crore in the September quarter, as against ₹1.02 lakh crore in the preceding June quarter, it said.It can be noted that the trend of companies' profits growing even as the economy contracts as a result of the pandemic has led some watchers to express concern claiming this is illustrative of widening inequalities.Crisil, which analysed a sample of 800 listed entities.