U.S. major data compromises 2023, by number of victims

In 2023, the most significant registered case of a data compromise in the United States, based on the number of affected individuals, was the T-Mobile data breach incident in January of that year. As a result of this incident, it is estimated that the e-mail addresses of about 37 million users were leaked. The second major data breach incident involved Comcast-owned Xfinity. This incident exposed over 35 million of the personal data of the internet provider's customers.