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investigation open

Updated 16 days ago

Millennium Partners Management Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving Millennium Partners Management.
•Discovered on September 18, 2026.
•Possible data exposed: Personal Information, SSN.
•Confirmation level: Confirmed by company.

Breach confirmed

The Millennium Partners Management breach is confirmed. If you may be affected, add your details below and we will take it from there.

Detailed summary

Millennium Partners Management, a real estate development firm based in New York, reported a data security incident. The company discovered a network disruption on April 27, 2026, and identified unauthorized access between April 24 and April 26, 2026. On July 9, 2026, Millennium Partners confirmed that data had been accessed and acquired, and subsequently posted a "Notice of Data Security Incident" on September 16, 2026, to notify affected individuals.

The breach may have involved sensitive personal information, including Social Security numbers. The number of affected customers and employees has not been publicly specified by the company. There is no official indication that medical or financial data was exposed in this incident.

A class action lawsuit investigation is underway in connection with the data breach, with attorneys looking into potential filings. Further details, including specific court docket numbers or class sizes, may emerge as litigation proceeds.

Data possibly involved

Personal Information
SSN
Can be used to open fraudulent accounts and file false tax returns

Company Response Timeline

Response Grade

Notified consumers within 91–180 days

Breach Occurred

Apr 24, 2026

Company Discovered

Apr 27, 2026

Regulator Notified

Sep 16, 2026

Consumers Notified

Sep 16, 2026

3 days to discover

142 days to notify consumers

Breach Verification Status

Reports Only

Complete

Initial dark web reports of potential breach

Company Confirmed

Current

Company has acknowledged the breach

Regulator Confirmed

Confirmed by regulatory authorities

Note: Breach verification can take time. Information may evolve as more details become available from companies and regulators.

Case Status:

Investigation Open

We're actively investigating this case and seeking affected individuals.

Were you affected? Submit your information below.

Were You Affected By This Breach?

If you are a customer or have received a data breach notification, you may submit your information as part of our ongoing investigation. Submitting your information is free and does not obligate you.

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Check Your Risk Level

Answer a few questions to understand how this breach might affect you

Do you use Millennium Partners Management?

Yes

What should I do?

Change your passwords

Update passwords for the affected service and any accounts using the same password

Enable two-factor authentication

Add an extra layer of security to your accounts

Monitor your accounts

Watch for suspicious activity on your financial and online accounts

Watch for phishing attempts

Be cautious of emails or messages claiming to be from the affected company

Consider a credit freeze

Prevent unauthorized access to your credit report

Scan your email for other exposures

Check whether this address shows up in other known breaches. Free, no account.

Get your info off data-broker sites

Data Shield files removal requests with every broker that accepts an authorized agent, and gives you the exact link or letter for the brokers that only accept requests from you.

See how Data Shield works