[6-K] NATIONAL GRID PLC Current Report (Foreign Issuer)

Rhea-AI Filing Summary

National Grid plc furnished a Form 6-K updating its share capital and voting rights and disclosing routine PDMR share purchases. As of 30 September 2025, registered capital was 5,191,884,002 ordinary shares, including 230,434,106 held in treasury, leaving 4,961,449,896 shares with voting rights for disclosure calculations.

PDMR transactions on the London Stock Exchange on 7 October 2025 under the Share Incentive Plan: CFO Andy Agg bought 14 shares at GBP 10.835; CEO John Pettigrew bought 13 shares at GBP 10.835; and Chief People Officer Will Serle bought 14 shares at GBP 10.835.

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: 31 October 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 1 October 2025 — Total Voting Rights
99.2	Exhibit 99.2 Announcement sent to the London Stock Exchange on 8 October 2025 — Director/PDMR Shareholding

Exhibit 99.1

1 October 2025

National Grid plc ('National Grid' or 'Company')

Voting Rights update

National Grid's registered capital as of 30 September 2025 consisted of 5,191,884,002 ordinary shares of which 230,434,106 were held as treasury shares; leaving a balance of 4,961,449,896 with voting rights.

The figure of 4,961,449,896 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, National Grid under the FCA's Disclosure Guidance and Transparency Rules.

Julian Baddeley

Group Company Secretary

Exhibit 99.2

8 October 2025

National Grid plc ('National Grid' or 'Company')

Notification of Transactions of Persons Discharging Managerial Responsibilities ('PDMRs')

This announcement is made in accordance with Article 19 of the Market Abuse Regulation ('MAR'). In accordance with MAR, the relevant Financial Conduct Authority ('FCA') notifications are set out below.

1	Details of the person discharging managerial responsibilities / person closely associated
a)	Name	Andy Agg
2	Reason for the notification
a)	Position/status	Chief Financial Officer
b)	Initial notification /Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	National Grid plc
b)	LEI	8R95QZMKZLJX5Q2XR704
4	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument Identification code	Ordinary shares of 12 204/473p each    GB00BDR05C01
b)	Nature of the transaction	Monthly purchase of securities ("partnership shares") under the Share Incentive Plan
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		GBP 10.835	14
d)	Aggregated information - Aggregated volume - Price
e)	Date of the transaction	2025.10.07
f)	Place of the transaction	London Stock Exchange (XLON)

1	Details of the person discharging managerial responsibilities / person closely associated
a)	Name	John Pettigrew
2	Reason for the notification
a)	Position/status	Chief Executive
b)	Initial notification /Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	National Grid plc
b)	LEI	8R95QZMKZLJX5Q2XR704
4	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument Identification code	Ordinary shares of 12 204/473p each    GB00BDR05C01
b)	Nature of the transaction	Monthly purchase of securities ("partnership shares") under the Share Incentive Plan
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		GBP 10.835	13
d)	Aggregated information - Aggregated volume - Price
e)	Date of the transaction	2025.10.07
f)	Place of the transaction	London Stock Exchange (XLON)

1	Details of the person discharging managerial responsibilities / person closely associated
a)	Name	Will Serle
2	Reason for the notification
a)	Position/status	Chief People Officer
b)	Initial notification /Amendment	Initial notification
3	Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
a)	Name	National Grid plc
b)	LEI	8R95QZMKZLJX5Q2XR704
4	Details of the transaction(s): section to be repeated for (i) each type of instrument; (ii) each type of transaction; (iii) each date; and (iv) each place where transactions have been conducted
a)	Description of the financial instrument, type of instrument Identification code	Ordinary shares of 12 204/473p each   GB00BDR05C01
b)	Nature of the transaction	Monthly purchase of securities ("partnership shares") under the Share Incentive Plan
c)	Price(s) and volume(s)	Price(s)	Volume(s)
		GBP 10.835	14
d)	Aggregated information - Aggregated volume - Price
e)	Date of the transaction	2025.10.07
f)	Place of the transaction	London Stock Exchange (XLON)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	NATIONAL GRID plc
	By:	Beth Melges
		Beth Melges Head of Plc Governance

Date: 31 October 2025



FAQ

What are National Grid (NGG) shares with voting rights as of 30 Sep 2025?

Shares with voting rights totaled 4,961,449,896 as of 30 September 2025.

What is National Grid (NGG) registered share capital and treasury balance?

Registered capital was 5,191,884,002 ordinary shares, with 230,434,106 held as treasury shares.

Which PDMRs purchased National Grid (NGG) shares and in what amounts?

Andy Agg bought 14, John Pettigrew bought 13, and Will Serle bought 14 shares.

At what price were the PDMR purchases of National Grid (NGG) shares made?

Each disclosed purchase was at GBP 10.835 per share.

When and where did the National Grid (NGG) PDMR transactions occur?

On 7 October 2025 on the London Stock Exchange (XLON).

Under which plan were the National Grid (NGG) PDMR shares acquired?

The shares were acquired under the Share Incentive Plan as monthly partnership share purchases.