National Grid plc Bond Offering

National Grid plc announced the issuance of U.S.$750,000,000 aggregate principal amount of 5.405% Notes due 2036. The issuance is part of a Registration Statement on Form F-3 (File No. 333-281812). The accompanying documents include the Underwriting Agreement dated June 4, 2026, and the Third Supplemental Indenture dated June 9, 2026, detailing the terms of the notes and the agreement between National Grid plc and the underwriters. Legal opinions regarding the validity of the debt securities under English and New York law were also provided. The company has represented that the registration statement, prospectus, and time of sale information comply with the Securities Act and do not contain any misleading statements. The transaction is structured to comply with relevant securities regulations, and the company has committed to ongoing compliance and cooperation with the underwriters throughout the offering process.