Chegg - 39,721,127 breached accounts

In April 2018, the textbook rental service Chegg suffered a data breach that impacted 40 million subscribers. The exposed data included email addresses, usernames, names and passwords stored as unsalted MD5 hashes. The data was provided to HIBP by a source who requested it be attributed to "This email address is being protected from spambots. You need JavaScript enabled to view it.".