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Breach occurred 2026-04-12Verifiedmarcusmillichap.com
What happened
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".
Data exposed
Frequently asked questions
The Marcus & Millichap data breach occurred on April 12, 2026. It was added to Have I Been Pwned's breach catalog on May 3, 2026.
1,837,078 accounts were affected by the Marcus & Millichap data breach, according to Have I Been Pwned's records.
The Marcus & Millichap breach exposed the following data types: Email addresses, Employers, Job titles, Names, Phone numbers, Physical addresses.
Yes. Have I Been Pwned has verified the Marcus & Millichap breach, meaning there's confirmed evidence the exposed data is genuine and tied to real accounts.
Use KazaSec's free Email Breach Checker (/tools/breach-check) to check whether a specific email address has surfaced in the Marcus & Millichap breach, or any other known breach — the tool never stores what you search.
Our free Email Breach Checker tells you whether a specific email address has surfaced in this breach — or any other known breach — without ever storing what you search.
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