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Updated about 1 month ago

MatTek Data Breach

▼ Key takeaways

•Reports suggest a potential breach involving MatTek.
•Discovered on July 23, 2026.
•Possible data exposed: SSN.
•Confirmation level: Based on reports.

Detailed summary

MatTek Corporation, a biotechnology company headquartered in Ashland, Massachusetts, appeared on a ransomware listing in July 2026. The group "thegentlemen" claimed responsibility for the incident, which involved the alleged exfiltration of data.

Currently, the specific types of data exposed and the number of individuals affected have not been publicly confirmed. Reports broadly mention "internal files" and "contact / identity PII," but a detailed breakdown, including whether sensitive information like SSNs, medical data, or financial data was compromised, is not available. No official breach notice or regulatory filing has been found.

Information regarding consumer notification dates and states affected is not yet known. Details about this incident may emerge as investigations continue, and official notices may be delayed.

Data possibly involved

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

Company Response Timeline

Breach Occurred

Jul 23, 2026

Company Discovered

Unknown

Regulator Notified

Unknown

Consumers Notified

Unknown

Breach Verification Status

Reports Only

Current

Initial dark web reports of potential breach

Company Confirmed

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?

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Check Your Risk Level

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

Do you use MatTek?

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.

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