Marcus & Millichap - 1,837,078 breached accounts

In April 2026, the commercial real estate brokerage firm Marcus & Millichap was named as one of multiple alleged victims of the ShinyHunters hacking and extortion group . Data alleged to have been obtained from the company was subsequently released publicly and included 1.8M unique email addresses, along with names, phone numbers and employment-related information including employer, job title and physical company address. In their disclosure notice , Marcus & Millichap advised that data which may have been accessed appeared limited to “company forms, templates, marketing materials, and general contact information”.