National GridKPI data tables
National Grid operating metrics behind the KPI charts, newest period first (up to 24 periods per chart). Periods use each company's own fiscal labels where the source does; each table names its source.
| Period | UK Electricity Transmission | UK Electricity Distribution | New York | New England | National Grid Ventures | UK Electricity System Operator | Other |
|---|---|---|---|---|---|---|---|
| FY 2026 | 4,372 | 1,617 | 3,428 | 2,043 | 109 | 0 | 7 |
| FY 2025 | 2,999 | 1,426 | 3,289 | 1,751 | 378 | 0 | 4 |
| FY 2024 | 1,912 | 1,247 | 2,654 | 1,673 | 662 | 85 | 2 |
Source: National Grid Full Year Results presentation for the year ended 31 March 2026, Capital investment table at actual exchange rates (FY 2026 and FY 2025): https://www.nationalgrid.com/document/576631/download. Full Year Results presentation / Annual Report for the year ended 31 March 2025, capital investment at actual exchange rates (FY 2025 and FY 2024): https://www.nationalgrid.com/document/559906/download and https://www.nationalgrid.com/document/560311/download.
| Period | UK Electricity Transmission | UK Electricity Distribution |
|---|---|---|
| FY 2026 | 23,847 | 13,139 |
| FY 2025 | 20,570 | 12,235 |
| FY 2024 | 18,388 | 11,497 |
Source: National Grid Full Year Results presentation for the year ended 31 March 2026, Detailed RoE and Regulated Financial Position for UK Electricity Transmission (closing RAV £23,847 million) and UK Electricity Distribution (closing RAV £13,139 million), with FY 2025 comparatives £20,570 million and £12,235 million: https://www.nationalgrid.com/document/576631/download. Full Year Results presentation for the year ended 31 March 2025, RAV table (FY 2024 closing RAV UK ET £18,388 million, UK ED £11,497 million): https://www.nationalgrid.com/document/559906/download.
| Period | UK RAV | US rate base |
|---|---|---|
| FY 2026 | 36,986 | 29,452 |
| FY 2025 | 32,805 | 27,345 |
| FY 2024 | 30,310 | 24,527 |
Source: National Grid Full Year Results presentation for the year ended 31 March 2026, asset growth and regulatory gearing tables (UK RAV and US rate base as at 31 March): https://www.nationalgrid.com/document/576631/download. Full Year Results presentation for the year ended 31 March 2025, RAV / rate base table (FY 2024 and FY 2025): https://www.nationalgrid.com/document/559906/download. Form 20-F for the year ended 31 March 2026 (asset growth narrative): https://www.sec.gov/Archives/edgar/data/1004315/000100431526000006/nggtf-20260331.htm.
| Period | NIMO Electric (upstate NY) | KEDNY (downstate gas) | Massachusetts Gas | KEDLI (Long Island gas) | Massachusetts Electric (incl. transmission) | New England Power (FERC) | NIMO Gas (upstate NY) | Other FERC |
|---|---|---|---|---|---|---|---|---|
| FY 2026 | 10,000 | 8,025 | 5,867 | 4,760 | 4,399 | 3,271 | 2,569 | 76 |
| FY 2025 | 9,232 | 7,212 | 5,408 | 4,439 | 3,766 | 2,938 | 2,266 | 58 |
| FY 2024 | 8,317 | 6,454 | 4,759 | 4,149 | 3,541 | 2,646 | 1,765 | 48 |
Source: National Grid Full Year Results presentation for the year ended 31 March 2026, Detailed RoE and Regulated Financial Position for New England and New York (rate base $ million as at 31 March 2026 and 2025): https://www.nationalgrid.com/document/576631/download. Full Year Results presentation for the year ended 31 March 2025, same tables (FY 2024 comparatives): https://www.nationalgrid.com/document/559906/download.