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Updated about 1 month ago

First Manhattan Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving First Manhattan.
•Discovered on May 18, 2026.
•Possible data exposed: Name, Social Security Number, Government ID Numbers.
•Confirmation level: Confirmed by company.

Breach confirmed

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

Detailed summary

A data security incident at FMC Group Holdings LP, operating as First Manhattan, was publicly associated with a Vermont regulatory filing on May 18, 2026. Official notice details are not publicly available, meaning key facts are currently unknown. The disclosure was made by First Manhattan itself.

Based on the available filing, the breach may have involved personal information such as name, Social Security number, and government identification numbers. The total number of affected individuals and specific states affected have not been publicly confirmed.

Details about the breach may be released as the investigation proceeds, and consumer notification timelines can vary.

Data possibly involved

Name
Social Security Number
Can be used to open fraudulent accounts and file false tax returns
Government ID Numbers

Company Response Timeline

Breach Occurred

May 18, 2026

Company Discovered

May 18, 2026

Regulator Notified

Unknown

Consumers Notified

Unknown

0 days to discover

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:

Monitoring

We're monitoring this situation for developments.

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.

Were you in the First Manhattan breach? Check your email

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Check Your Risk Level

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

Do you use First Manhattan?

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