Brookfield (Brookfield Corporation (TSX:BN)), GIC of Singapore (GIC Private Limited), the country?s sovereign wealth fund and Alpha Wave (Alpha Wave Global, LP) are circling around PGP Glass Private Limited (formerly called Piramal Glass) for a minimum 50% stake along with joint control as Blackstone Inc. (NYSE:BX) the current owners of the company looks to part sell and unlock value from their 3 year old investment, said people familiar with the matter.