National Grid PLC SEC filings NMPWP
National Grid PLC has 1,002 filings in SEC EDGAR's recent list, going back to Jan 6, 2003. Its latest annual report, Form 20-F, was filed on Jun 3, 2026 for the period ended Mar 31, 2026. The most recent current report (Form 6-K) was filed on Nov 5, 2026. The company's fiscal year ends on March 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Apr 23, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 5, 2025 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Jan 25, 2023 | — |
| SC 13G | Ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 1, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 29, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 5, 2020 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 6, 2019 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 20, 2018 | — |
| 4 | Insider transaction | Feb 20, 2018 | Feb 15, 2018 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 8, 2018 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2017 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 27, 2016 | — |
| SC 13G | Ownership over 5% (passive) | Oct 9, 2015 | — |
| 3 | Initial insider ownership | Oct 9, 2015 | Sep 29, 2015 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 30, 2015 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2014 | — |
| SC 13G | Ownership over 5% (passive) | Feb 13, 2014 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 3, 2014 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2013 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 11, 2013 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2012 | — |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2012 | — |
| SC 13G | Ownership over 5% (passive) | Feb 2, 2011 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2007 | — |
| SC 13G | Ownership over 5% (passive) | Feb 10, 2006 | — |
Showing 29 filings. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Natural Gas Transmission (SIC 4922)
- Listed as
- NGG (NYSE), NGGTF (OTC), NEWEN (OTC), NMKBP (OTC), NMKCP (OTC), NMPWP (OTC)
- Fiscal year ends
- March 31
- Headquarters
- London, United Kingdom
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1004315
- Former names
- NATIONAL GRID TRANSCO PLC (until Jul 28, 2005); NATIONAL GRID GROUP PLC (until Nov 1, 2002)
Other Natural Gas Transmission companies
Source: SEC EDGAR filings. This is company-reported data, not investment advice.