National Aluminium Company Ltd (NALCO) on Monday reported a 28% year-on-year increase in standalone profit after tax to Rs 1,835.09 crore for the September quarter of FY27, compared with Rs 1,433.17 crore in the corresponding quarter last year. Revenue from operations rose 26.3% to Rs 5,419.44 crore from Rs 4,292.34 crore, according to the company’s stock exchange filing. Stronger aluminium earnings offset a decline in the chemicals business.