National Grid CFO Andy Agg buys 13 shares

The voting-rights count provides the denominator for shareholders’ FCA notification calculations.

Available on EDGAR 10/30/2026 - 06:17 AM EDT Accepted by SEC EDGAR 10/30/2026 - 06:16 AM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

National Grid plc (NGG) reported that Chief Financial Officer Andy Agg purchased 13 ordinary shares at GBP 11.3681 per share on October 7, 2026, as monthly “partnership shares” under the Share Incentive Plan. The reported aggregate price was GBP 147.78, and the transaction took place on the London Stock Exchange.

As of September 30, 2026, National Grid had 5,026,908,988 shares with voting rights. Its registered capital comprised 5,249,831,589 ordinary shares, of which 222,922,601 were held as treasury shares. The company said shareholders may use the voting-rights count as the denominator for determining notification requirements under the FCA’s Disclosure Guidance and Transparency Rules.

Key Figures

Shares purchased: 13 ordinary shares Purchase price: GBP 11.3681 per share Aggregate price: GBP 147.78 +3 more

6 metrics

Shares purchased 13 ordinary shares Andy Agg’s purchase on October 7, 2026

Purchase price GBP 11.3681 per share Andy Agg’s purchase on October 7, 2026

Aggregate price GBP 147.78 Andy Agg’s purchase of 13 shares

Shares with voting rights 5,026,908,988 shares As of September 30, 2026

Ordinary shares of registered capital 5,249,831,589 shares As of September 30, 2026

Treasury shares 222,922,601 shares As of September 30, 2026

Key Terms

treasury shares, Share Incentive Plan, partnership shares, Person Discharging Managerial Responsibilities

4 terms

treasury shares financial

"222,922,601 were held as treasury shares"

Treasury shares are a company’s own stock that it has repurchased and keeps on its books instead of canceling or leaving in the hands of outside investors. Think of them like coupons a business puts back in a drawer: they don’t vote or receive dividends while held, but they can be reissued later for employee pay or fundraising. For investors this matters because buybacks change the number of shares that count toward earnings and ownership, can boost per‑share metrics, and use corporate cash that might otherwise go to growth or dividends.

Share Incentive Plan financial

"under the Share Incentive Plan"

A share incentive plan is a company program that gives employees or directors the chance to receive or buy company shares, often after staying with the firm or meeting performance goals. It matters to investors because it’s like giving workers a slice of the company pie to boost performance and loyalty, but issuing those slices can reduce each existing owner’s portion and change metrics such as earnings per share and share count.

partnership shares financial

"monthly purchase of securities (“partnership shares”)"

Person Discharging Managerial Responsibilities regulatory

"Notification of Transaction of Person Discharging Managerial Responsibilities"

A person discharging managerial responsibilities is an individual who holds a senior role with authority to make or influence a company’s strategic or operational decisions, such as executives, board members, or other top managers. Investors care because these people often have access to confidential information and their buying or selling of company shares must be disclosed—like a referee who knows the score before the crowd, their actions can signal important, non-public insights about a company's prospects.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many National Grid (NGG) shares did CFO Andy Agg purchase, and at what price?

Chief Financial Officer Andy Agg purchased 13 ordinary shares at GBP 11.3681 per share on October 7, 2026. The reported aggregate price was GBP 147.78.

What was National Grid’s voting-rights count at September 30, 2026?

National Grid reported 5,026,908,988 shares with voting rights as of September 30, 2026. The company said shareholders may use that figure as the denominator for determining notification requirements under the FCA’s Disclosure Guidance and Transparency Rules.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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: 30 October 2026

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 01 October 2026 — Total Voting Rights
99.2	Exhibit 99.2 Announcement sent to the London Stock Exchange on 09 October 2026 — Director/PDMR Shareholding

Exhibit 99.1

1 October 2026

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

Voting Rights update

National Grid's registered capital as of 30 September 2026 consisted of 5,249,831,589 ordinary shares, of which, 222,922,601 were held as treasury shares; leaving a balance of 5,026,908,988 with voting rights.

The figure of 5,026,908,988 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

9 October 2026

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

Notification of Transaction of Person Discharging Managerial Responsibilities ('PDMR’)

This announcement is made in accordance with Article 19 of the Market Abuse Regulation (‘MAR’). In accordance with MAR, the relevant Financial Conduct Authority notification is 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 11.3681	13
d)	Aggregated information - Volume - Price	13 GBP 147.78
e)	Date of the transaction	2026.10.07
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:	Ceri Jamond
		Ceri Jamond Co-Deputy Company Secretary, Corporate

Date: 30 October 2026