The ShinyHunters extortion group stole the personal information of 5.5 million individuals after breaching the systems of home security giant ADT earlier this month, according to data breach notification service Have I Been Pwned.

Founded in 1874 as American District Telegraph, ADT is the oldest and largest home security company in the United States, currently providing monitored security and smart home solutions to over 6 million residential and small-business customers.

ADT has previously disclosed two other data breaches in August 2024 and October 2024 that exposed employee and customer information.