The state-run firm had clocked a net profit of Rs 174.32 crore in the year-go period, it said in a BSE filing.
Total standalone income of the Navratna firm rose 4 per cent to Rs 1,549 crore in April-June quarter this fiscal from Rs 1,491.27 crore during the same quarter in 2015-16 fiscal.
Its total expenses were higher at Rs 1,473.19 crore from Rs 1,361.63 crore during the period under review.
The total alumina sale during the quarter was 2.91 Lakh tonnes (LT) and aluminium sale was 82,386 tonnes, it added.
However, considering the sluggishness of international market, Nalco's performance is considered to be a silver lining amid the downturn in both domestic and overseas market, the PSU said.
Nalco's bauxite, raw material used to produce aluminium, rose by 46 per cent to 17.04 LT in April-June quarter this fiscal from 11.64 LT in the year-ago period.
Alumina hydrate production grew by 35 per cent to 5.24 LT against 3.88 LT during the quarter under review.
The firm's Rs 2,835 crore offer to buyback 64.43 crore shares opened last month on August 30 and will close this week on September 14.
The offer size represents 22.15 per cent of the aggregate of the fully paid-up share capital and free reserves of the Navratna company for the financial year ended March 31, 2015.
In May, the PSU had announced plans to buyback shares not exceeding 64,43,09,628 (representing 25 per cent of the total number of equity shares in paid-up share capital of the firm).
Government holds 80.93 per cent stake in Nalco.
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