NSE IPO 2026 complete guide: DRHP filed June 17 with SEBI. India’s biggest-ever corporate listing at Rs 25,000-30,000 crore — 100% OFS. LIC is largest seller at 10.72% stake. NSE valuation Rs 5 lakh crore+. PAT Rs 10,302 crore FY26 with 55% margin. 92.99% cash market share, near monopoly in equity futures. IPO date timeline, key risks, valuation and should you invest? Full guide.