Realty major DLF’s promoters are likely to sell 40 per cent stake in its rental arm by September, a deal estimated to fetch around Rs 12,000 crore.According to sources, three global institutional investors — Blackstone, GIC and Abu Dhabi Investment Authority — have been shortlisted as buyers in DLF Cyber City Developers Ltd (DCCDL). Due diligence process is on and the agreement is likely to be signed...