Warburg Pincus-Backed ESR Raises Over $1 Billion To Accelerate Data Center Expansion Across Asia Pacific ESR Cayman—which counts Warburg Pincus, Singapore tycoon John Lim and billionaire Chew Gek Khim’s Straits Trading as major shareholders—raised over $1 billion to bankroll the expansion of its data center footprint across the Asia Pacific.