Windy Lakeside Investment Ltd, an affiliate of US-based private equity firm Warburg Pincus, will invest ₹800 crore in India's largest private port operator Adani Ports and Special Economic Zone Ltd (APSEZ) for a 0.49% stake in the company. About 1 crore equity shares of face value of ₹2 per share will be allotted to the investment company at ₹800 each.