National Grid plc Files 6-K Report

TL;DR

National Grid plc filed a 6-K, just a routine update for foreign issuers.

AI Summary

National Grid plc filed a Form 6-K on November 25, 2025, reporting its holding(s) in the company. The filing is a report of a foreign private issuer pursuant to Rule 13a-16 or 15d-16 under the Securities Exchange Act of 1934. National Grid plc is incorporated in England and Wales and its principal executive office is located at 1-3 Strand, London, WC2N 5EH, United Kingdom.

Why It Matters

This filing provides an update on National Grid plc's corporate structure and reporting status as a foreign private issuer in the US market.

Risk Assessment

Risk Level: low — This filing is a standard regulatory report for a foreign private issuer and does not contain new financial information or strategic changes.

Key Players & Entities

• NATIONAL GRID PLC (company) — Filer
• 0001004315 (company) — Central Index Key
• 1-3 STRAND (company) — Business Address Street 1
• LONDON (company) — Business Address City
• WC2N 5EH (company) — Business Address Zip
• NATIONAL GRID TRANSCO PLC (company) — Former Company Name
• NATIONAL GRID GROUP PLC (company) — Former Company Name
• NATIONAL GRID HOLDING PLC (company) — Former Company Name

FAQ

Filing Documents

• a9791i.htm (6-K) — 292KB
• 0001654954-25-013438.txt ( ) — 293KB

From the Filing

(S) IN COMPANY a9791i     UNITED STATES   SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549     FORM 6-K     REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934   Date: 25 November 2025   Commission File Number: 001-14958       NATIONAL GRID plc   (Translation of registrant’s name into English)   England and Wales   (Jurisdiction of Incorporation)        1-3 Strand, London, WC2N 5EH, United Kingdom (Address of principal executive office)       Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.   ☒   Form 20-F       ☐   Form 40-F   Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):   ☐   Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):   ☐   Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3- 2(b) under the Securities Exchange Act of 1934.   ☐   Yes     ☒   No   If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): n/a       EXHIBIT INDEX   Exhibit No.   Description   99.1 Exhibit 99.1 Announcement sent to the London Stock Exchange on 25 November 2025   — Holding(s) in Company     Exhibit 99.1     25 November 2025   National Grid plc ('National Grid' or 'Company')   Notification of Major Interest in National Grid Ordinary Shares   National Grid has received a notification on Form TR-1 from BlackRock, Inc. that its total interest in National Grid voting ordinary shares is as shown below.     TR-1: Standard form for notification of major holdings   1. Issuer Details   ISIN   GB00BDR05C01   Issuer Name   NATIONAL GRID PLC   UK or Non-UK Issuer   UK   2. Reason for Notification   An acquisition or disposal of voting rights   3. Details of person subject to the notification obligation   Name   BlackRock, Inc.     Wilmington   Country of registered office (if applicable)   USA   4. Details of the shareholder   Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above             Country of registered office (if applicable)       5. Date on which the threshold was crossed or reached   24-Nov-2025   6. Date on which Issuer notified   25-Nov-2025   7. Total positions of person(s) subject to the notification obligation     % of voting rights attached to shares (total of 8.A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights held in issuer Resulting situation on the date on which threshold was crossed or reached   7.320000   0.850000   8.170000   406584816   Position of previous notification (if applicable)   4.870000   3.250000   8.120000       8. Notified details of the resulting situation on the date on which the threshold was crossed or reached   8A. Voting rights attached to shares   Class/Type of shares ISIN code(if possible) Number of direct voting rights (DTR5.1) Number of indirect voting rights (DTR5.2.1) % of direct voting rights (DTR5.1) % of indirect voting rights (DTR5.2.1) GB00BDR05C01     363408544     7.320000   Sub Total 8.A 363408544   7.320000%     8B1. Financial Instruments according to (DTR5.3.1R.(1) (a))   Type of financial instrument Expiration date Exercise/conversion period Number of voting rights that may be acquired if the instrument is exercised/converted % of voting rights American Depository Receipt       5172395   0.100000   Securities Lending       36210021   0.720000   Sub Total 8.B1   41382416   0.820000%     8B2. Financial Instru

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View this 6-K filing on SEC EDGAR