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Parexel International, LLC Data Breach

State
Montana
Reported
Dec 17, 2025
Breach date
Oct 4, 2025

Parexel International, LLC, a global provider of biopharmaceutical services, has reported a significant data security incident. The breach, which occurred on October 4, 2025, involved unauthorized access to sensitive personal information. The company officially filed its report regarding the incident on December 17, 2025, with the Montana Attorney General.

The compromised data in this breach includes Full Name, Date of Birth, Social Security Number, Medical Record Number, Health Insurance ID Number, Clinical Trial Participation Records, Diagnosis and Treatment Information, and Contact Information. The exposure of such detailed personal and health records can lead to serious consequences for those affected, ranging from medical identity theft to financial fraud.

As an organization handling vast amounts of confidential patient and research data, Parexel International has a critical responsibility to maintain robust cybersecurity protections. The occurrence of this data breach raises concerns about the effectiveness of the company's security measures and whether they adequately fulfilled their legal and ethical obligations to protect sensitive information.

If you have received an official data breach notification letter from Parexel International, it confirms that your personal and health information was exposed in this incident. Receiving such a letter can establish your basis for pursuing legal claims related to potential damages and the effort required to protect yourself from future harm.

Our firm is currently investigating potential class action claims on behalf of individuals impacted by the Parexel International data breach. We provide free case reviews to help you understand your legal options without any obligation. You will not pay any upfront fees, and attorney fees are only incurred if we successfully secure compensation for you.

Information exposed

  • Full Name
  • Date of Birth
  • Social Security Number
  • Medical Record Number
  • Health Insurance ID Number
  • Clinical Trial Participation Records
  • Diagnosis and Treatment Information
  • Contact Information

Got a letter from Parexel International, LLC?

A licensed data breach attorney will review your situation for free. No fee unless you recover.

Reviewed by David S. Harris, Esq., Law Office of David S. Harris · Florida Bar No. 0112739. About the firm

Source: Montana attorney general breach filing