A private equity real estate investment firm, Walton Street Capital, L.L.C. has been a prominent player in the real estate arena since its inception in 1994. Since its founding in 1994, Walton Street has received total equity commitments of over US $ 3.5 billion from public and corporate pension plans, foreign institutions, insurance companies and banks, endowments and foundations, trusts and high net worth individuals. 
Founded in 1991, Starwood Capital Group Global LLC is a global investment management firm specializing in real estate related investments of over US $ 18 billion in global real estate markets. Their highly diversified portfolio includes residential and commercial land development, hotels, offices, retail, health clubs and golf assets.
Shriram Properties is the property development arm of Rs. 43,000 crore Shriram Group of Companies. From a humble beginning in South India, Shriram Properties Pvt. Ltd. is looking forward to extend it’s footprints across the country. Incepted in 1995, today Rs. 450 crore of Shriram Properties’ development focuses is on Integrated Township, IT/ITES SEZ, self contained residential enclaves, retail malls, affordable housing and hospitality. With projects delivered 5.0 million square feet and land reserves of 1050 acres along with the built up area of various projects under implementation as 73 million square feet, Shriram Properties has marked its foothold significantly in cities like Bangalore, Chennai, Coimbatore, Visakapattnam and Kolkata.
Both Walton Street Capital and Starwood Capital are the prime stakeholders along with Bangalore based Shriram Properties for developing "Sonar Bangla" – the integrated township project at Uttarpara.
