Understanding your Parexel International, LLC data breach notification letter
If a Parexel International, LLC letter arrived in your mailbox, here is what it means, why you received it, and the free steps you can take right now.
Why you received this letter
Parexel International, LLC, a global clinical research organization, filed notice of a data breach with Montana authorities on December 17, 2025. This incident, which occurred on October 4, 2025, involved the potential exposure of personal information. Individuals who received a notification letter should carefully review its contents for specific details and recommended actions.
What to do after the letter
Confirm the notice is genuine
A legitimate Parexel International, LLC notice references the specific incident reported to the Montana Attorney General and describes which categories of your information were involved. Compare the letter against the public filing before acting on any links or phone numbers it contains.
Keep the letter — it is your proof of connection
The notification letter is the document that ties your personal information to this incident. Keep the original and photograph it. If you later request a case review, this letter is the strongest evidence that you were among the affected individuals.
Protect your accounts and credit
Depending on what was exposed, consider a free credit freeze with all three bureaus, new passwords for reused credentials, and monitoring of financial statements. These steps are free and do not require you to wait for anyone's permission.
Check the record against the public filing
You can verify the Parexel International, LLC incident against the filing reported to the Montana Attorney General. This registry summarizes what was filed; it does not provide legal advice.
This page summarizes a data breach reported to the Montana Attorney General for informational purposes. DataBreachCaseFile.com is a neutral reference registry and does not provide legal advice.