Glancy Prongay & Murray LLP, a leading national shareholder rights law firm, today announced that it has commenced an investigation on behalf of National Grid plc (“National Grid” or the “Company”) (NYSE: NGG) investors concerning the Company’s possible violations of the federal securities laws.

IF YOU ARE AN INVESTOR WHO LOST MONEY ON NATIONAL GRID PLC (NGG), CLICK HERE TO INQUIRE ABOUT POTENTIALLY PURSUING CLAIMS TO RECOVER YOUR LOSS.

What Happened?

On July 1, 2025, the National Energy System Operator in the UK published a report stating that a fire on March 20, 2025, that resulted in Heathrow Airport shutting down, had been caused by a known fault at an electrical substation owned by National Grid, which had been aware of the problem since 2018 but failed to fix it.

On this news, National Grid’s stock price fell $3.77, or 5.1%, to close at $70.61 per share on July 2, 2025, thereby injuring investors.

Contact Us To Participate or Learn More:

If you wish to learn more about this action, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us.

Charles Linehan, Esq.

Glancy Prongay & Murray LLP

1925 Century Park East, Suite 2100

Los Angeles California 90067

Email: shareholders@glancylaw.com

Telephone: 310-201-9150 (Toll-Free: 888-773-9224)

Visit our website at www.glancylaw.com.

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Whistleblower Notice

Persons with non-public information regarding National Grid should consider their options to aid the investigation or take advantage of the SEC Whistleblower Program. Under the program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Charles H. Linehan at 310-201-9150 or 888-773-9224 or email shareholders@glancylaw.com.

About Glancy Prongay & Murray LLP

Glancy Prongay & Murray LLP (“GPM”) is a premier law firm representing investors and consumers in securities litigation and other complex class action litigation. GPM has been consistently ranked in the Top 50 Securities Class Action Settlements by ISS Securities Class Action Services. In 2018, GPM was ranked a top five law firm in number of securities class action settlements, and a top six law firm for total dollar size of settlements.

With four offices across the country, GPM’s nearly 40 attorneys have won groundbreaking rulings and recovered billions of dollars for investors and consumers in securities, antitrust, consumer, and employment class actions. GPM’s lawyers have handled cases covering a wide spectrum of corporate misconduct and relating to nearly all industries and sectors. GPM’s past successes have been widely covered by leading news and industry publications such as The Wall Street Journal, The Financial Times, Bloomberg Businessweek, Reuters, the Associated Press, Barron’s, Investor’s Business Daily, Forbes, and Money.

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