Aditya Birla Group's metals arm Hindalco Industries Ltd has called off its proposed USD 125 million acquisition of US-based AluChem Companies Inc after extended delays in closing the transaction, according to a regulatory filing.

Hindalco and the US-based firm have jointly decided to terminate the equity purchase agreement for the proposed acquisition of AluChem and its speciality calcined and tabular alumina business, the Aditya Birla Group metals flagship said in a late-night filing on BSE on Thursday.