Windels Marx Lane & Mittendorf LLP data breach

Clerk's notes

On March 30, 2026, Windels Marx Lane & Mittendorf LLP formally notified the Indiana Attorney General of a data security incident. This report confirms unauthorized access to their systems, which was first identified on September 11, 2025.

As a prominent law firm, Windels Marx Lane & Mittendorf LLP handles a wide array of sensitive client data. If you received an official notification letter from the firm, it indicates that your personal information was stored within their systems and may have been compromised during this event.

While the specific categories of data involved in this breach have not been detailed in public filings, the firm has acknowledged that personal information was accessed. It is important to treat any potential exposure of your data with caution, regardless of the specific details.

To protect yourself, closely review any financial statements and consider placing a fraud alert or freezing your credit with the major bureaus. Remain vigilant for any suspicious communications or unsolicited requests for information, especially those claiming to be from the firm or related to this incident.

The incident is currently under investigation. If you received a data breach notification from Windels Marx Lane & Mittendorf LLP and wish to understand your potential legal options, you may be eligible for a free case review.

If a notification letter about this breach reached you, see every Indiana data breach on file or browse all cases.