National Grid (NGG) updates voting rights and reports small PDMR share deals

Rhea-AI Filing Summary

National Grid plc reports its share capital and two small insider-related share transactions. As of 31 March 2026, the company had 5,198,968,690 ordinary shares in issue, including 225,541,858 held in treasury, leaving 4,973,426,832 shares with voting rights for regulatory disclosure calculations.

The filing also notes that Chief Financial Officer Andy Agg acquired 11 ordinary shares on 7 April 2026 through a monthly purchase under the Share Incentive Plan. In a separate disclosure, closely associated person Jacqueline Agg acquired small numbers of shares via automatic dividend reinvestment on the London Stock Exchange.

Key Figures

Ordinary shares in issue: 5,198,968,690 shares Treasury shares: 225,541,858 shares Shares with voting rights: 4,973,426,832 shares +5 more

8 metrics

Ordinary shares in issue 5,198,968,690 shares Registered capital as of 31 March 2026

Treasury shares 225,541,858 shares Held in treasury, no voting rights

Shares with voting rights 4,973,426,832 shares Voting denominator as of 31 March 2026

CFO SIP purchase 11 shares at GBP 13.1892 Monthly Share Incentive Plan buy on 7 April 2026

Dividend reinvestment trade 1 51 shares at £9.8933 Automatic reinvestment by Jacqueline Agg

Dividend reinvestment trade 2 30 shares at £9.6700 Automatic reinvestment by Jacqueline Agg

Dividend reinvestment trade 3 53 shares at £10.4000 Automatic reinvestment by Jacqueline Agg

Dividend reinvestment trade 4 27 shares at £11.5128 Automatic reinvestment by Jacqueline Agg

Key Terms

Total Voting Rights, treasury shares, Persons Discharging Managerial Responsibilities, Market Abuse Regulation, +2 more

6 terms

Total Voting Rights financial

"Announcement sent to the London Stock Exchange on 01 April 2026 — Total Voting Rights"

The total voting rights number is the count of shares that carry the right to vote at a company’s shareholder meetings, reflecting how much voting power exists in the market. Investors use it to understand control and influence—like knowing how many votes are in play when measuring ownership stakes, calculating a shareholder’s voting percentage, or assessing how easy it would be for a holder to sway decisions.

treasury shares financial

"5,198,968,690 ordinary shares, of which, 225,541,858 were held as treasury shares; leaving a balance"

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.

Persons Discharging Managerial Responsibilities regulatory

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

Persons Discharging Managerial Responsibilities are the key people in a company who make big decisions, like top managers or executives. Knowing who they are is important because their actions can influence the company’s success or failure, and they are often required to share information about their dealings to ensure transparency for investors and the public.

Market Abuse Regulation regulatory

"This announcement is made in accordance with Article 19 of the Market Abuse Regulation ('MAR')."

Market abuse regulation consists of laws and rules designed to prevent dishonest or manipulative practices in financial markets. It aims to ensure fair and transparent trading, so investors can trust that markets operate honestly, much like rules that keep a game fair. By reducing unfair advantages, it helps protect investor confidence and promotes healthy, efficient markets.

Share Incentive Plan financial

"Monthly purchase of securities ("partnership shares") 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.

closely associated person regulatory

"closely associated person of a PDMR and were identified as part of year-end exercise"

Form 6-K: How Foreign Companies Report to the SEC →

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 April 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 April 2026 — Total Voting Rights
99.2	Exhibit 99.2 Announcement sent to the London Stock Exchange on 08 April 2026 — Director/PDMR Shareholding
99.3	Exhibit 99.3 Announcement sent to the London Stock Exchange on 28 April 2026 — Director/PDMR Shareholding

Exhibit 99.1

1 April 2026

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

Voting Rights update

National Grid's registered capital as of 31 March 2026 consisted of 5,198,968,690 ordinary shares, of which, 225,541,858 were held as treasury shares; leaving a balance of 4,973,426,832 with voting rights.

The figure of 4,973,426,832 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 April 2026

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 13.1892	11
d)	Aggregated information - Aggregated volume - Price
e)	Date of the transaction	2026.04.07
f)	Place of the transaction	London Stock Exchange (XLON)

Exhibit 99.3

28 April 2026

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

Notification of Transactions of Person 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 notifications are set out below.

The transactions relate to the automatic reinvestment of dividends on shares held by a closely associated person of a PDMR and were identified as part of year-end exercise and notified to the Company on 25 April 2026.

Reason for the notification
Initial notification / amendment	Initial notification
Details of the issuer, emission allowance market participant, auction platform, auctioneer or auction monitor
Name	National Grid plc
LEI	8R95QZMKZLJX5Q2XR704
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
Description of the financial instrument, type of instrument	Ordinary shares of 12 204/473p each
Identification code	GB00BDR05C01
Nature of the transaction	Acquisition of shares following a dividend reinvestment.
Place of transaction	London Stock Exchange (XLON)

Date of transaction	Name	Position / status	Price (s)	Volume (s)	Aggregated information
2024-08-13	Jacqueline Agg	Closely Associated Person of Andy Agg	£9.8933	51	N/A single Transaction
2025-02-12	Jacqueline Agg	Closely Associated Person of Andy Agg	£9.6700	30	N/A single Transaction
2025-08-13	Jacqueline Agg	Closely Associated Person of Andy Agg	£10.4000	53	N/A single Transaction
2026-01-14	Jacqueline Agg	Closely Associated Person of Andy Agg	£11.5128	27	N/A single Transaction

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: 30 April 2026

FAQ

What total voting rights does National Grid plc (NGG) report as of 31 March 2026?

National Grid reports 4,973,426,832 ordinary shares with voting rights as of 31 March 2026. Shareholders may use this figure as the denominator when calculating whether they must notify holdings under the FCA’s Disclosure Guidance and Transparency Rules.

How many National Grid plc (NGG) shares are held in treasury?

National Grid’s registered capital includes 225,541,858 ordinary shares held as treasury shares. Treasury shares do not carry voting rights, so they are excluded from the 4,973,426,832 shares used for disclosure calculations under UK transparency regulations.

What transaction did National Grid plc (NGG) CFO Andy Agg report under MAR?

Chief Financial Officer Andy Agg reported a monthly purchase of 11 ordinary shares under the Share Incentive Plan at a price of GBP 13.1892 per share. This routine acquisition is disclosed as a Person Discharging Managerial Responsibilities (PDMR) transaction under the Market Abuse Regulation.

What dividend reinvestment transactions were disclosed for Jacqueline Agg related to NGG?

Closely associated person Jacqueline Agg acquired small quantities of National Grid shares through automatic dividend reinvestment. Transactions included 51 shares at £9.8933, 30 at £9.6700, 53 at £10.4000 and 27 at £11.5128, each recorded as a single transaction on the London Stock Exchange.

Why does National Grid plc (NGG) publish a voting rights update?

National Grid publishes voting rights updates to inform investors of the current number of shares with voting rights. This helps shareholders determine if their holdings cross disclosure thresholds set by the FCA’s Disclosure Guidance and Transparency Rules, ensuring compliance with transparency requirements.