Mumbai, Feb 13 (PTI) Pharma and biotechnology firm, Wockhardt, today reported 50 per cent rise in its net profit at Rs 213 crore during the quarter ended December 2011. The company's consolidated sales revenues grew by 27.1 percent to Rs 1,209 crore over the corresponding quarter of the last year. Net profit was up by 50 per cent at Rs 213 crore and operating profit (EBIDTA) was up by 54.5 percent to Rs 376 crore. Operating margins at 31.1 percent improved by 550 basis points, a company statement said here. "Wockhardt is exhibiting robust growth worldwide and our US operations have for the first time surpassed all records by crossing the USD 100 million mark in a single quarter," said Wockhardt Chairman Habil Khorakiwala. "This is one of our best quarter results so far with our net profit margins growing by 50 percent on a quarter-on-quarter basis. We are confident of closing this financial year on a high note", Khorakiwalas said. For the 9 months ended December 2011, the company has shown turnaround in profitability and a continuous improvement in margins. Consolidated sales revenues grew by 19.9 percent at Rs 3,372 crore. Net Profit was Rs 534 crore and operating profit (EBIDTA) was up by 57 percent to Rs 1,011 crore. Operating margins at 30 percent improved by 710 basis points. Wockhardt said its international sales currently contribute 74 percent to the overall turnover.