Motilal Oswal on Thursday reported a 29% year-on-year (YoY) increase in operating profit after tax (PAT) to Rs 718 crore for the September quarter, compared with Rs 554 crore a year earlier, driven by strong growth in its asset management business.The company's total PAT, including other comprehensive income (OCI), surged to Rs 1,070 crore from Rs 285 crore in the corresponding quarter last year, representing a nearly fourfold increase.However, total PAT declined 29% sequentially from Rs 1,513 crore in the June quarter, reflecting lower mark-to-market gains on treasury investments.