1.8M records in April 2026. Check whether your email is in this file — then read what was taken and what to do.
1.8M
Records exposed
2026
Year
6
Data types
Free
To check
Quick answer — was Marcus & Millichap breached?
Yes. Marcus & Millichap was breached in April 2026, exposing 1,837,078 records including email addresses, employers, job titles. This breach has been independently verified. If your email was involved, your data may still be at risk today. Check if you were affected.
What happened in the Marcus & Millichap data breach?
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".
The exposed data included 6 types of personal information. Learn more about what a data breach means for you.
Why was the Marcus & Millichap breach so dangerous?
The Marcus & Millichap breach exposed 1,837,078 records — 1.8M people whose personal data is now circulating in criminal markets.
If you used Marcus & Millichap, check whether your email was exposed in this breach.
What data was stolen in the Marcus & Millichap breach?
Email addresses — used for phishing attacks and credential stuffing against your other accounts
Employers — may be combined with other breach data to build a profile for targeted attacks
Job titles — may be combined with other breach data to build a profile for targeted attacks
Names — used to build profiles and target you with personalised scams
Phone numbers — enables SIM-swapping attacks and targeted SMS phishing
Physical addresses — combined with other data, used for identity theft and physical fraud
Is the Marcus & Millichap breach still dangerous in 2026?
Yes. Stolen data from the Marcus & Millichap breach remains dangerous years after the incident. Attackers routinely compile data from multiple breaches to build complete profiles, and credentials from 2026 are still actively used in automated attacks today.
Personal information like email addresses, phone numbers, and dates of birth does not expire. Even if you changed your Marcus & Millichap password, the other exposed data can be combined with information from other breaches to target you. Learn how long stolen data stays dangerous.
What to do if your email was in the Marcus & Millichap breach
1
Change your Marcus & Millichap password immediately
Log into Marcus & Millichap and change your password to something strong and unique — one you have never used anywhere else. A password manager after a breach can generate and store a unique password so you never reuse one.
2
Change any account sharing that password
If you reused this password elsewhere, walk the password-reuse change checklist. You can also check whether that password appears in known leaks without sending the password itself.
3
Enable two-factor authentication
Turn on 2FA or a passkey after a breach on Marcus & Millichap and every important account. Even if your password is known, attackers cannot sign in without the second factor.
4
Check your other accounts for this breach
Run a full email scan to see every breach your address appears in — not just this one. Then follow the after-breach playbook. If a password from this incident is still in use, check it without sending the password itself.
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Shrink people-search listings if your name or address was exposed
A leaked email plus a public people-search page makes phishing more convincing. That is a separate job from changing passwords. See the data broker opt-out guide for official forms and, if you want help, removal services.
Frequently asked about the Marcus & Millichap breach
How many people were affected by the Marcus & Millichap data breach?
Approximately 1,837,078 user records were exposed in the Marcus & Millichap breach in April 2026.
Is the Marcus & Millichap breach still a risk in 2026?
Yes. Leaked credentials are actively used in credential-stuffing attacks years after a breach. If you reused your Marcus & Millichap password elsewhere and have not changed it, those accounts remain at risk today.
How do I check if my email was in the Marcus & Millichap breach?
Enter your email in the free checker on EmailLeaked. We scan millions of breach records including the Marcus & Millichap dataset and tell you instantly whether your email was exposed and what data was taken.
What should I do if I was in the Marcus & Millichap breach?
Change your Marcus & Millichap password immediately, update any account where you used the same password, and enable two-factor authentication on all important accounts. Use a unique password for every account — a password manager makes this straightforward — and monitor for phishing emails over the next 90 days.
How this breach page is reviewed
Breach pages are built from structured breach records and reviewed for practical risk guidance by EmailLeaked. Risk labels reflect exposed data types and are intended to help readers prioritise action.
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