National Grid plc Stock This Week: RIIO‑T3 Decision, UK Grid Reforms, Analyst Targets and the Week‑Ahead Outlook (Updated 14 December 2025)
National Grid shares closed at 1,118.5p on Friday, up 1.41% for the week, as investors reacted to Ofgem’s RIIO-T3 Final Determination. The regulator set a real allowed cost of equity at 6.12% for 2026–31, below the company’s requested baseline totex. National Grid said it will review whether the framework is “investable and workable,” with a response expected in March 2026.