Private equity firm Warburg Pincus has sold a 6.45% stake in Kalyan Jewellers for Rs 3,584 crore via open market transactions, with shares sold at Rs 539 apiece. The transaction saw investments from the Singapore government, Fidelity, Nomura, HSBC Mutual Fund, and Citigroup Global Markets. Warburg Pincus had previously held a 9.17% stake in the company.