Greylock McKinnon Associates Data Breach Investigation

Turke & Strauss LLP, a leading data breach law firm, is investigating Greylock McKinnon Associates, Inc. (“GMA”) regarding its recent data breach. The GMA data breach involved sensitive personal identifiable information belonging to over 5,000 individuals.


GMA is a consulting firm based in Massachusetts. Founded in 2005, GMA provides economic analysis and litigation support to a diverse group of domestic and international clients in the legal profession, the business community, and government agencies. Additionally, GMA economists are nationally recognized experts from major universities and have considerable experience at deposition, trial, and regulatory hearings.2  Today, GMA conducts economic, statistical, econometric, and financial analyses for clients requiring economic advice.2 Headquartered in Boston, Massachusetts, GMA has two additional locations in Washington D.C. and Hanover, New Hampshire, and employs over 30 individuals.


Recently, GMA discovered that it had experienced a data breach in which sensitive personal identifiable information in its systems may have been accessed. Through its investigation, GMA determined that an unauthorized party may have accessed this sensitive information on May 30, 2023. On February 23, 2024, GMA began notifying individuals whose information may have been impacted. The type of personal information potentially exposed includes:

  • Name
  • Social Security number

If you received a breach notification letter from Greylock McKinnon Associates, Inc.:

We would like to speak with you about your rights and potential legal remedies in response to this data breach. Please fill out the form, below, or contact us at (608) 237-1775 or

If you were impacted by the GMA data breach, you may consider taking the following steps to protect your personal information.

  1. Carefully review the breach notice and retain a copy;
  2. Enroll in any free credit monitoring services provided by Greylock McKinnon Associates, Inc.:
  3. Change passwords and security questions for online accounts;
  4. Regularly review account statements for signs of fraud or unauthorized activity;
  5. Monitor credit reports for signs of identity theft; and
  6. Contact a credit bureau(s) to request a temporary fraud alert.

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