"McGraw Hill Financial acquired 10,623,059 equity shares from shareholders of Crisil, which represents 15.1% of the total equity shares outstanding," it said in a statement.
After the acquisition, the stake of McGraw Hill has gone up to 67.8% from 52.8%.
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"We have enjoyed a very productive long-term relationship with Crisil, which has been enormously successful, and our new investment underscores the confidence we have in Crisil's future," said Harold McGraw III, Chairman, President and CEO of McGraw Hill Financial.
The company said that it has financed the transaction with existing cash resources at a cash offer of Rs 1,210 per share.
The offer represents a premium of 29% to the closing share price on May 31, 2013 and a premium of 12% to Crisil's all-time closing high on the NSE prior to the offer being announced.
Crisil is a global analytical company and one of India's leading credit ratings and research agency.
McGraw Hill Financial is a finance intelligence company providing global capital and commodity markets with independent benchmarks, credit ratings, portfolio and enterprise risk solutions and analytics.
Shares of Crisil were being traded at Rs 1,150 apiece on the BSE, down 1.51% from the previous close.