The list includes those involving the theft or compromise of 30,000 or more records, although many smaller breaches occur continually. Explore the biggest data breaches from 2013 to 2024 Learn about the biggest data breaches of the past 20 years, how they happened, and how you can better protect your organization from major threats.
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Data breaches are the worst nightmare for many companies
In the second quarter of 2025, nearly 94 million data records were leaked in data breaches, impacting millions of individuals.
Learn about the 30 biggest data breaches since 2005, ranked by users or records, with data types, causes, and sources. Our updated list for 2023 ranks the 72 biggest data breaches of all time, ranked by impact Learn from their mistakes to avoid costly damages. To make it on this list of the biggest data breaches, the attacks include both a massive number of records exposed and a wide range of data accessed by threat actors.
More than 70% of data breaches are traceable to organized crime groups 45% of americans have had their personal information compromised in the last five years One in three data breaches in 2024 involved shadow data — data outside a company’s centralized system 82% of data breaches involve cloud data.
The breach reportedly exposed personal and financial details for nearly two million people from roughly 500,000 companies.
Our roundup of the biggest ransomware attacks, data breaches, and vulnerabilities affecting global organisations and public sectors in october 2025.
