Company: NEWEN
Filing Date: 2025-05-29
Form Type: 6-K
Source: 0001654954-25-006235
Chunk: 0

Company: NATIONAL GRID PLC
Filing Date: 2025-05-29
Form: 6-K
Chunk 0
---
### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington D.C. 20549

#### FORM 6-K
<div align='center'>**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934**</div>

#### Date: 29 May 2025

#### Commission File Number: 001-14958

#### NATIONAL GRID plc
<div align='center'>(Translation of registrant’s name into English)</div>

#### England and Wales
<div align='center'>(Jurisdiction of Incorporation)</div>

#### 1-3 Strand, London, WC2N 5EH, United Kingdom
<div align='center'>(Address of principal executive office)</div>

<div align='center'>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</div>

### EXHIBIT INDEX
| Exhibit 
 No.     | Description                                                   |
| 99.1    | Exhibit                                                       
 99.1 Announcement sent to the London Stock Exchange on 29 May 
 2025—                                                         
 Publication of Annual Report and Accounts & AGM               |

Exhibit 99.1

#### 29 May 2025
<div align='center'>**National Grid plc ('National Grid' or the 'Company')**</div>

#### Publication of Annual Report and Accounts and

#### Notice of 2025 AGM
National Grid announces that the following documents have been published today and are available on its website at https://www.national