National Grid plc Form 6-K Filing Summary - April 2026

This filing contains three exhibits. Exhibit 99.1, dated April 1, 2026, provides an update on National Grid plc's voting rights. As of March 31, 2026, the company had 5,198,968,690 ordinary shares, with 225,541,858 held in treasury, leaving 4,973,426,832 shares with voting rights. This figure is the denominator for shareholders calculating notification requirements under the FCA's Disclosure Guidance and Transparency Rules. Exhibits 99.2 and 99.3, dated April 8 and April 28, 2026, respectively, report on transactions by Persons Discharging Managerial Responsibilities (PDMRs) and their closely associated persons, in accordance with Article 19 of the Market Abuse Regulation (MAR). Exhibit 99.2 details a monthly purchase of ordinary shares by Chief Financial Officer Andy Agg under the Share Incentive Plan on April 7, 2026, for GBP 13.1892 per share (11 shares). Exhibit 99.3 reports on the automatic reinvestment of dividends on shares held by Jacqueline Agg, a closely associated person of Andy Agg. These transactions, involving the acquisition of ordinary shares following dividend reinvestment, occurred on various dates in 2024, 2025, and 2026, with prices ranging from GBP 9.6700 to GBP 11.5128.