National Grid plc Stock (NG.L): Share Price, RIIO‑T3 Decision, Sea Link Contracts and Analyst Forecasts as of 20 December 2025
National Grid shares closed at 1,142p on 19 December 2025, up nearly 24% over the past year, with a dividend yield near 4.1%. Investors are watching Ofgem’s RIIO-T3 final determination, which sets a 6.12% allowed cost of equity from April 2026. National Grid expects to respond to licence terms in early March 2026. The company’s market cap stands at about £56.6 billion.