Oil & Gas PSUs (e.g., ONGC, IOCL, HPCL) backed 32 startups at Startup Mahakumbh 2025, including WellRx (oilfield solutions, now in 120+ countries) and Maraal Aerospace (solar drones). ONGC’s startup fund saw 450% valuation growth; IOCL’s IndS_UP supported 42 ventures, creating 635 jobs. No new entities, but expansions in deep-tech for sustainable energy.