National Grid PLC 6-K, filed Feb 19, 2020
National Grid PLC (NGG)
About this 6-K
National Grid PLC filed this 6-K on February 19, 2020.
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549
FORM 6-K
REPORT OF FOREIGN ISSUER
PURSUANT TO RULE 13a-16 OR 15d-16
OF THE SECURITIES EXCHANGE ACT OF 1934
Date: 19 February 2020
Commission File Number: 001-14958
NATIONAL GRID plc
(Registrant’s Name)
1-3 Strand
London WC2N 5EH, England
(Registrant’s Address)
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
Please see Exhibit 99. 1 - “Summary” and Exhibit 99.2 - “Announcements”
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: | /s/ Megan Barnes<br><br>________________________ |
| Name Megan Barnes<br><br>Head of Secretariat |
Date: 19 February 2020
EXHIBIT INDEX
| Exhibit<br><br>No. | Description |
|---|---|
| 99.1 | Summary |
| 99.2 | Routine Announcements in the period to 14 February 2020 |
Exhibit
EXHIBIT 99.1
SUMMARY
FORM 6-K
SECURITIES AND EXCHANGE COMMISSION
Washington D.C. 20549
Report of Foreign Issuer
Pursuant to Rule 13a - 16 or 15d - 16 of
The Securities Exchange Act of 1934
Announcements sent to the London Stock Exchange
National Grid plc, 1-3 Strand, London, WC2N 5EH, United Kingdom
Update - Routine announcements in the period to 14 February 2020
| 10 February 2020 | Director/PDMR Shareholding |
|---|---|
| 7 February 2020 | Holding(s) in Company |
| 5 February 2020 | Director/PDMR Shareholding |
| 3 February 2020 | Total Voting Rights |
| 20 January 2020 | Director/PDMR Shareholding |
| 17 January 2020 | Director/PDMR Shareholding |
Note: During the period a ‘same day’ Form 6-Ks were issued in respect of the following National Grid plc announcements:
| 30 January 2020 | Succession Plans to Appoint New Chairman |
|---|---|
| 20 January 2020 | Total Voting Rights and Capital Update |
| 14 January 2020 | Scrip Dividend |
announcments99214feb20

Exhibit 99.2 ANNOUNCEMENTS FORM 6-K SECURITIES AND EXCHANGE COMMISSION Washington D.C. 20549 Report of Foreign Issuer Pursuant to Rule 13a - 16 or 15d - 16 of The Securities Exchange Act of 1934 Announcements sent to the London Stock Exchange National Grid plc, 1-3 Strand, London, WC2N 5EH, United Kingdom Update - Routine announcements in the period to 14 February 2020

NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES The attached individual notifications made under article 19.1 of the Market Abuse Regulation (‘MAR’) relate to the National Grid Share Incentive Plan (‘SIP’) monthly purchases on behalf of PDMRs. This announcement is made in accordance with Article 19.3 of MAR. Name of officer of issuer responsible for making notification: Megan Barnes Date of notification: 2020.02.10 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Alison Kay 2 Reason for the notification a) Position/status Group General Counsel & Company Secretary b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument GB00BDR05C01 Identification code 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 10.2996 12

d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.02.07 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Megan Barnes Date of notification: 2020.02.10 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 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 Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument GB00BDR05C01 Identification code

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 10.2996 14 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.02.07 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Megan Barnes Date of notification: 2020.02.10 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 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 Officer b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument GB00BDR05C01 Identification code 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 10.2996 15 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.02.07 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Megan Barnes Date of notification: 2020.02.10 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Lucy Nicola Shaw 2 Reason for the notification

a) Position/status Executive Director, UK b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code 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 10.2996 15 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.02.07 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Megan Barnes Date of notification: 2020.02.10

7 February 2020 National Grid plc (National Grid) Notification of Major Interest in National Grid Ordinary Shares National Grid has received a notification on Form TR-1 from Competrol International Investments Limited that its total interest in National Grid voting ordinary shares is as shown below. 1a. Identity of the issuer or the underlying issuer of existing shares to which voting National Grid plc rights are attachedi: 1b. Please indicate if the issuer is a non-UK issuer (please mark with an “X” if appropriate) Non-UK issuer 2. Reason for the notification (please mark the appropriate box or boxes with an “X”) An acquisition or disposal of voting rights An acquisition or disposal of financial instruments X An event changing the breakdown of voting rights Other (please specify): 3. Details of person subject to the notification obligation Name Competrol International Investments Limited City and country of registered office (if Tortola, British Virgin Islands applicable) 4. Full name of shareholder(s) (if different from 3.) Name City and country of registered office (if applicable) 5. Date on which the threshold was crossed 6 February 2020 or reached: 6. Date on which issuer notified 7 February 2020 (DD/MM/YYYY): 7. Total positions of person(s) subject to the notification obligation % of voting rights % of voting rights through financial Total number of attached to Total of both in % instruments voting rights of shares (total of 8. (8.A + 8.B) (total of 8.B 1 + 8.B issuer A) 2) Resulting situation on the - 2.97 2.97 3,508,270,045 date on which threshold was

crossed or reached Position of previous - 3.38 3.38 notification (if applicable) 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached A: Voting rights attached to shares Class/type of Number of voting rightsix % of voting rights shares Direct Indirect Direct Indirect ISIN code (if (Art 9 of (Art 10 of (Art 9 of Directive (Art 10 of possible) Directive Directive 2004/109/EC) Directive 2004/109/EC) 2004/109/EC) (DTR5.1) 2004/109/EC) (DTR5.1) (DTR5.2.1) (DTR5.2.1) SUBTOTAL 8. A B 1: Financial Instruments according to Art. 13(1)(a) of Directive 2004/109/EC (DTR5.3.1.1 (a)) Number of voting rights that may be Exercise/ Type of financial Expiration acquired if the % of voting Conversion instrument date instrument is rights Period exercised/converted . Total Return 27 February - 28,651,544 0.82 Equity Swap 2020 SUBTOTAL 8. B 28,651,544 0.82 1 B 2: Financial Instruments with similar economic effect according to Art. 13(1)(b) of Directive 2004/109/EC (DTR5.3.1.1 (b)) Type of Exercise/ Physical or Number of Expiration % of voting financial Conversi cash voting date rights instrument on Period settlement rights Total Return 27 February - Cash 75,469,153 2.15 Equity Swaps 2020 - SUBTOTAL 75,469,153 2.15 8.B.2

- Information in relation to the person subject to the notification obligation (please mark the applicable box with an “X”) Person subject to the notification obligation is not controlled by any natural person or legal entity and does not control any other undertaking(s) holding directly or indirectly an interest in the (underlying) issuer Full chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held starting with the ultimate controlling natural person X or legal entity (please add additional rows as necessary) % of voting % of voting rights rights if it through financial Total of both if it equals or is instruments if it equals or is higher Name higher than the equals or is higher than the notifiable notifiable than the notifiable threshold threshold threshold Olayan Investments - 2.97 2.97 Company Establishment Competrol Establishment - 2.97 2.97 Competrol International - 2.97 2.97 Investments Limited 10. In case of proxy voting, please identify: Name of the proxy holder The number and % of voting rights held The date until which the voting rights will be held 11. Additional informationxvi Baker McKenzie LLP Eugene Budkevich 020 7919 1066 Place of London, UK completion Date of completion 7 February 2020 This notice is in compliance with National Grid's obligations under the Disclosure and Transparency Rules. Zoë Burnell Company Secretarial Assistant 020 7004 3227

NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Adriana Karaboutis 2 Reason for the notification a) Position/status Chief Information and Digital Officer b) Initial notification Initial notification /Amendment 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 American Depository Shares instrument, type of instrument US 636274409 Identification code b) Nature of the transaction Monthly purchase of securities under the National Grid Employee Stock Purchase Plan c) Price(s) and volume(s) Price(s) Volume(s) $55.832165 33.285114 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.02.03 f) Place of the transaction Outside a trading venue Name of officer of issuer responsible for making notification: Nick Ivory Date of notification: 2020.02.05

3 February 2020 National Grid plc (National Grid) Voting Rights and Capital Update National Grid's registered capital as at 31 January 2020 consisted of 3,780,237,016 ordinary shares, of which, 271,966,971 were held as treasury shares; leaving a balance of 3,508,270,045 shares with voting rights. The figure of 3,508,270,045 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 Disclosure Guidance and Transparency Rules. Contact: Z Burnell, Company Secretarial Assistant, (0207 004 3227).

NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES The attached individual notification made under article 19.1 of the Market Abuse Regulation ('MAR') relate to the National Grid final Ordinary scrip alternative, dividend reinvestment under the National Grid Share Incentive Plan (‘SIP’) and dividend reinvestment on behalf of PDMRs and CAPs. This announcement is made in accordance with Article 19.3 of MAR. Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.20 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Adriana Karaboutis 2 Reason for the notification a) Position/status Chief Information and Digital Officer b) Initial notification Initial notification /Amendment 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 American Depositary Shares instrument, type of instrument Identification code US 636274409 b) Nature of the transaction Acquisition of securities (“dividend reinvestment”) c) Price(s) and volume(s) Price(s) Volume(s) $63.38 USD 79 d) Aggregated information

- Aggregated volume - Price e) Date of the transaction 2020.01.17 f) Place of the transaction Outside a trading venue Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.20 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL 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 Officer b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities (“dividend reinvestment”) under an ISA

c) Price(s) and volume(s) Price(s) Volume(s) GBP 9.59989 107 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.16 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.20

NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES The attached individual notification made under article 19.1 of the Market Abuse Regulation ('MAR') relate to the National Grid final Ordinary scrip alternative, dividend reinvestment under the National Grid Share Incentive Plan (‘SIP’) and dividend reinvestment on behalf of PDMRs and CAPs. This announcement is made in accordance with Article 19.3 of MAR. Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Mrs. Anne Dawson 2 Reason for the notification a) Position/status CAP of Jonathan Dawson Non-executive Director b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities under the Scrip Dividend Scheme. c) Price(s) and volume(s) Price(s) Volume(s) GBP 8.8416 755 d) Aggregated information

- Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Sir Peter Gershon 2 Reason for the notification a) Position/status Chairman b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities under the Scrip Dividend Scheme.

c) Price(s) and volume(s) Price(s) Volume(s) GBP 8.8416 173 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities under the Scrip Dividend Scheme. c) Price(s) and volume(s) Price(s) Volume(s) GBP 8.8416 370 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON)

Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Lady Eileen Gershon 2 Reason for the notification a) Position/status CAP of Sir Peter Gershon Chairman b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities under the Scrip Dividend Scheme. c) Price(s) and volume(s) Price(s) Volume(s) GBP 8.8416 95 d) Aggregated information - Aggregated volume - Price

e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Sir Peter and Lady Eileen Gershon 2 Reason for the notification a) Position/status Chairman and CAP of Sir Peter Gershon b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities under the Scrip Dividend Scheme c) Price(s) and volume(s) Price(s) Volume(s) GBP 8.8416 1,334

d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Andrew Agg 2 Reason for the notification a) Position/status Chief Financial Officer b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities (“dividend shares”) under the HMRC Approved Share Incentive Plan. c) Price(s) and volume(s) Price(s) Volume(s) GBP 9.3961 52 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17 NATIONAL GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 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 Officer b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities (“dividend shares”) under the HMRC Approved Share Incentive Plan c) Price(s) and volume(s) Price(s) Volume(s) GBP 9.3961 78 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.15 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell NATIONAL Date of notification: 2020.01.17 GRID PLC NOTIFICATION OF TRANSACTIONS OF PERSONS DISCHARGING MANAGERIAL RESPONSIBILITIES 1 Details of the person discharging managerial responsibilities / person closely associated a) Name Lucy Nicola Shaw 2 Reason for the notification a) Position/status Executive Director, UK

b) Initial notification Initial notification /Amendment 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 Ordinary shares of 12 204/473p each instrument, type of instrument Identification code GB00BDR05C01 b) Nature of the transaction Acquisition of securities (“dividend reinvestment”) c) Price(s) and volume(s) Price(s) Volume(s) GBP 9.6071 1,744 d) Aggregated information - Aggregated volume - Price e) Date of the transaction 2020.01.16 f) Place of the transaction London Stock Exchange (XLON) Name of officer of issuer responsible for making notification: Zoë Burnell Date of notification: 2020.01.17