National Grid PLC SEC filings NMKCP
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 |
|---|---|---|---|
| 424B5 | Prospectus supplement | Jun 5, 2026 | — |
| FWP | Free writing prospectus | Jun 4, 2026 | — |
| 424B5 | Prospectus supplement | Jun 4, 2026 | — |
| S-8 | Employee stock plan registration | Feb 27, 2026 | — |
| F-3ASR | Filing | Aug 28, 2024 | — |
| 424B5 | Prospectus supplement | Jan 9, 2024 | — |
| FWP | Free writing prospectus | Jan 8, 2024 | — |
| 424B5 | Prospectus supplement | Jan 8, 2024 | — |
| 424B5 | Prospectus supplement | Jun 8, 2023 | — |
| FWP | Free writing prospectus | Jun 8, 2023 | — |
| 424B5 | Prospectus supplement | Jun 6, 2023 | — |
| F-3ASR | Form f-3asr | Jun 8, 2021 | — |
| F-3ASR | Form f-3asr | Jun 4, 2018 | — |
| F-3ASR | Form f-3asr | Jul 17, 2015 | — |
| F-6 POS | Post effective amendment no. 1 to the form f-6 | May 16, 2013 | — |
| S-8 | Employee stock plan registration | Oct 23, 2012 | — |
| F-3ASR | Form f-3 | Jul 20, 2012 | — |
| F-6EF | Form f-6 | Nov 18, 2011 | — |
| S-8 | Employee stock plan registration | Jul 28, 2011 | — |
| S-8 | Employee stock plan registration | Nov 19, 2010 | — |
| F-3ASR | Filing | Jun 16, 2009 | — |
| S-8 | Employee stock plan registration | Nov 20, 2008 | — |
| S-8 | Employee stock plan registration | Mar 20, 2008 | — |
| 424B2 | Prospectus | Jul 20, 2006 | — |
| FWP | Free writing prospectus | Jul 20, 2006 | — |
| 424B2 | Prospectus | Jul 14, 2006 | — |
| F-3ASR | Filing | Jun 28, 2006 | — |
| F-6 POS | Post-effective amendment no. 1 | Aug 1, 2005 | — |
| POS AMC | Filing | Jun 15, 2005 | — |
| POS AMC | Amd 4 | May 5, 2005 | — |
| POS AMC | Post-effective amendment no. 2 to finanancing app | Mar 9, 2005 | — |
| F-3 | Shelf registration (foreign issuer) | Nov 17, 2004 | — |
| S-8 | Employee stock plan registration | Aug 7, 2003 | — |
| S-8 POS | Filing | Aug 7, 2003 | — |
| POS AMC | Post-effective amendment | Aug 1, 2003 | — |
| S-8 | Employee stock plan registration | Mar 12, 2003 | — |
| POS AMC | Post-effective amendment no. 3 | Jan 10, 2003 | — |
Showing 37 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.