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National Grid PLC (NGG)

NYSE: NGG · Natural Gas Transmission · London, GB · filing with the SEC since 2000
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Grade4.0
◀ Past 5.2● Present 3.7▶ Future 3.4
1 est.
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Filings

475 filings since 2017 beside 1 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026
Due nextLarge accelerated filer
20-F Annual report, foreign filer for the fiscal year ending Mar 31, 2027Foreign filers have four months after the fiscal year ends. by Jul 29, 2027

A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files.

Filings a yearinsider forms included
5643493940595037
20192020202120222023202420252026

2026 counts to Nov 13, 2026.

Insider forms 1

Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.

FiledFormWhat it is, in plain wordsPeriodAsk
Nov 5, 2026 6-K Interim report, foreign filer
Nov 5, 2026 6-K Interim report, foreign filer Sep 30, 2026
Oct 30, 2026 6-K Interim report, foreign filer
Oct 5, 2026 6-K Interim report, foreign filer
Sep 30, 2026 6-K Interim report, foreign filer
Aug 28, 2026 6-K Interim report, foreign filer
Aug 3, 2026 6-K Interim report, foreign filer
Jul 31, 2026 6-K Interim report, foreign filer
Jul 23, 2026 6-K Interim report, foreign filer
Jul 22, 2026 6-K Interim report, foreign filer
Jul 14, 2026 6-K Interim report, foreign filer
Jul 1, 2026 6-K Interim report, foreign filer
Jun 30, 2026 6-K Interim report, foreign filer
Jun 16, 2026 11-K Employee plan annual report Dec 31, 2025
Jun 12, 2026 8-A12B Class of securities registered for listing
Jun 12, 2026 CERT Exchange listing certification
Jun 9, 2026 6-K Interim report, foreign filer
Jun 5, 2026 424B5 Shelf offering
Jun 4, 2026 6-K Interim report, foreign filer
Jun 4, 2026 FWP Offering communication
Jun 4, 2026 424B5 Shelf offering
Jun 3, 2026 6-K Interim report, foreign filer
Jun 3, 2026 6-K Interim report, foreign filer
Jun 3, 2026 20-F Annual report, foreign filer Mar 31, 2026
May 29, 2026 6-K Interim report, foreign filer
May 14, 2026 6-K Interim report, foreign filer
Apr 30, 2026 6-K Interim report, foreign filer
Apr 13, 2026 6-K Interim report, foreign filer
Mar 31, 2026 6-K Interim report, foreign filer
Mar 2, 2026 6-K Interim report, foreign filer
Feb 27, 2026 6-K Interim report, foreign filer
Feb 27, 2026 S-8 Employee stock plan registration
Jan 30, 2026 6-K Interim report, foreign filer
Jan 23, 2026 6-K Interim report, foreign filer
Jan 14, 2026 6-K Interim report, foreign filer
Jan 12, 2026 6-K Interim report, foreign filer
Jan 12, 2026 6-K Interim report, foreign filer
Dec 31, 2025 6-K Interim report, foreign filer
Dec 11, 2025 6-K Interim report, foreign filer
Dec 4, 2025 6-K Interim report, foreign filer
40 of 475 shown

Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.

SI Assistanton NGG · research, not advice