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

Rhea-AI Filing Summary

National Grid plc reports that its Chief Executive, John Pettigrew, will join the board of BAE Systems plc as a Non-executive Director and member of its Audit and Risk Committee effective 23 February 2026. The filing reiterates that Mr. Pettigrew will retire from his role as Chief Executive of National Grid effective 16 November 2025. The announcement is provided in accordance with UK Listing Rule 6.4.9R(2).

Positive

• Transparent disclosure of CEO's retirement date and subsequent external board appointment with specific effective dates
• Compliance with UK Listing Rule 6.4.9R(2) demonstrated by formal notice

Negative

• No information provided about succession planning or interim leadership arrangements
• No comment on potential conflicts of interest or time commitment related to the CEO's external board role

Insights

Financial Analyst

TL;DR: Leadership transition confirmed and upcoming external board role for the CEO; limited immediate financial impact stated.

National Grid's filing confirms two clear, date-specific governance events: the CEO's retirement from operational duties on 16 November 2025 and his appointment to BAE Systems' board on 23 February 2026. From a financial analysis perspective, the document contains no operating metrics, guidance, or transaction details that would directly affect near-term valuation models. The items are governance disclosures that may be relevant to investor assessment of succession planning and executive commitments but do not include material financial information.

Corporate Governance Expert

TL;DR: The filing discloses a post-retirement external board appointment and confirms the CEO's retirement date; this is a routine governance disclosure.

Under UK Listing Rule 6.4.9R(2), the company has appropriately disclosed the director-related appointment with precise effective dates. The filing does not describe any conflicts of interest, time commitment issues, or board approvals related to the appointment. It also does not provide details on National Grid's succession arrangements beyond the CEO's retirement date. As presented, the disclosure meets listing-rule reporting requirements but leaves succession specifics to other communications.

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: 24 September 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 24 September 2025— Director Declaration

Exhibit 99.1

24 September 2025

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

Director Declaration

In accordance with UK Listing Rule 6.4.9R(2), National Grid announces that John Pettigrew, Chief Executive of the Company, will join the Board of BAE Systems plc as a Non-executive Director and member of its Audit and Risk Committee with effect from 23 February 2026.

As announced on 1 May 2025, John will retire from his role as Chief Executive of National Grid effective 16 November 2025.

Julian Baddeley

Group Company Secretary

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: 24 September 2025

FAQ

When will John Pettigrew retire as Chief Executive of National Grid (NEWEN)?

The filing states John Pettigrew will retire as Chief Executive effective 16 November 2025.

When does John Pettigrew's Non-executive Director role at BAE Systems begin?

The filing states his appointment at BAE Systems as Non-executive Director and Audit and Risk Committee member takes effect on 23 February 2026.

Does the Form 6-K include National Grid's succession plan for the CEO?

No. The document only confirms the retirement date and the external appointment; it does not provide details on succession arrangements.

Is there any financial or operational impact disclosed from these appointments?

No. The filing contains no financial metrics, guidance, or statements about operational impact.

Under which rule was this director declaration provided?

The announcement was made in accordance with UK Listing Rule 6.4.9R(2).