National Grid PLC SEC filings NGG
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 |
|---|---|---|---|
| 20-F | Annual report (foreign issuer) | Jun 3, 2026 | Mar 31, 2026 |
| 20-F | Annual report (foreign issuer) | May 29, 2025 | Mar 31, 2025 |
| 20-F | Annual report (foreign issuer) | May 23, 2024 | Mar 31, 2024 |
| 20-F | Annual report (foreign issuer) | Jun 6, 2023 | Mar 31, 2023 |
| 20-F | Annual report (foreign issuer) | Jun 7, 2022 | Mar 31, 2022 |
| 20-F | Annual report (foreign issuer) | Jun 8, 2021 | Mar 31, 2021 |
| 20-F | Annual report (foreign issuer) | Jun 25, 2020 | Mar 31, 2020 |
| 20-F | Annual report (foreign issuer) | Jun 4, 2019 | Mar 31, 2019 |
| 20-F | Annual report (foreign issuer) | Jun 4, 2018 | Mar 30, 2018 |
| 20-F/A | Amended annual report (foreign issuer) | Jul 17, 2017 | Mar 31, 2017 |
| 20-F | Annual report (foreign issuer) | Jun 6, 2017 | Mar 31, 2017 |
| 20-F | Annual report (foreign issuer) | Jun 7, 2016 | Mar 31, 2016 |
| 20-F | Annual report (foreign issuer) | Jun 5, 2015 | Mar 31, 2015 |
| 20-F | Annual report (foreign issuer) | Jun 5, 2014 | Mar 31, 2014 |
| 20-F | Annual report (foreign issuer) | Jun 10, 2013 | Mar 31, 2013 |
| 20-F | Annual report (foreign issuer) | Jun 12, 2012 | Mar 31, 2012 |
| 20-F | Annual report (foreign issuer) | Jun 13, 2011 | Mar 31, 2011 |
| 20-F | Annual report (foreign issuer) | May 25, 2010 | Mar 31, 2010 |
| 20-F | Annual report (foreign issuer) | Jun 16, 2009 | Mar 31, 2009 |
| 20-F | Annual report (foreign issuer) | Jun 17, 2008 | Mar 31, 2008 |
| 20-F | Annual report (foreign issuer) | Jun 19, 2007 | Mar 31, 2007 |
| 20-F | Annual report (foreign issuer) | Jun 20, 2006 | Mar 31, 2006 |
| 20-F | Annual report (foreign issuer) | Jun 15, 2005 | Mar 31, 2005 |
| 20-F | Annual report (foreign issuer) | Jun 16, 2004 | Mar 31, 2004 |
| 20-F | Annual report (foreign issuer) | Jun 11, 2003 | Mar 31, 2003 |
Showing 25 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.