Marcus & Millichap Data Breach
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".
Compromised Data
Recommended Actions
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Affected Accounts:
1.8 million
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Breach Occurred:
April 2026
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Added to HIBP:
3 May 2026
Recommended Actions
Change Your Password
If you haven’t already changed the password affected by this breach, do so immediately on every account where it was used.
Enable Two-Factor Authentication
Wherever 2FA is supported, add an extra layer of security to your account.
Get Aura for identity theft and credit protection. Keep your assets safe with fast fraud alerts, instant credit lock, and $1,000,000 identity theft insurance. Speak to a U.S. based fraud specialist 24/7.
Try Aura
Use a password manager to generate and store strong, unique passwords for all your accounts. 1Password helps protect your data with industry-leading security.
Try 1Password
Get Guardio for real-time protection after a breach. Guardio blocks AI-generated scam sites, fake login pages, and malicious pages designed to exploit leaked information. Built by cybersecurity specialists who track new threats 24/7, Guardio gives you immediate, expert-level protection plus clear steps to help you secure your accounts instantly.
Try Guardio