Parexel International, LLC data breach
Incident readout
- Company
- Parexel International, LLC
- Reported to
- Montana Attorney General
- Filed
- December 17, 2025
- People affected
- Not stated in the filing
- Incident type in filing
- Not stated
- Our review
- Investigation Open
Was this a ransomware attack?
The filing does not say ransomware was involved. We do not label an incident ransomware unless the company’s report says so. Whatever the cause, the steps to protect yourself and the legal question are the same.
What we know
Parexel International, LLC is a global clinical research organization that provides specialized services to the biopharmaceutical and medical device industries. Given the nature of their business, the company typically collects and maintains sensitive personal information, including detailed health records, clinical trial participation data, and government identification numbers required for regulatory compliance. This data breach was officially reported to the Montana Attorney General in 2025, and the company has since issued formal notification letters to all impacted individuals. If you received such a letter, it indicates that your personal or health-related information may have been compromised. We recommend reviewing the details provided in your notice carefully to understand the specific scope of the incident and the protective measures being offered by the company.
See every breach reported in Montana or read what to do after a ransomware attack.
After the Parexel International, LLC incident: what to do and your options
- What should I do after getting the Parexel International, LLC data breach notice?
- Keep the letter and the envelope, and note the date it arrived. Freeze your credit with Equifax, Experian and TransUnion, change any passwords the notice mentions, and sign up for any free credit monitoring the letter offers. Then check whether you may have a claim.
- Did Parexel International, LLC offer free credit monitoring?
- Check your letter from Parexel International, LLC. If free credit or identity monitoring is offered, the enrollment code and deadline are printed in the notice itself. Using the free service won't stop you from joining a lawsuit or settlement later.
- Can I sue Parexel International, LLC over the data breach?
- It depends on what was exposed, the law in Montana and your own state, and whether you've been harmed. Most people take part through a class action rather than suing alone. Keep your notification letter — it's the proof that connects you to the breach.
- Do I need a Parexel International, LLC data breach lawyer or attorney?
- Whether the company's systems were encrypted by ransomware or data was simply taken, the legal question is the same: did it protect your information the way the law requires? An attorney can review your notice for free, and these cases are usually handled on contingency.
- Is there a Parexel International, LLC data breach class action lawsuit?
- Law firms often open an investigation after a breach notice like this one, and a class action lawsuit may follow. This page doesn't confirm that a lawsuit has been filed against Parexel International, LLC. You usually don't have to join a class action to be included — if a settlement is reached, class members are notified and can file a claim.
- Is the Parexel International, LLC data breach letter legit or a scam?
- A notice from Parexel International, LLC in the mail matches the breach Parexel International, LLC reported to the Montana Attorney General on December 17, 2025. Check that the company name and dates in your letter match that filing. A real notice of data security incident won't ask for your password, Social Security number or a payment — if it does, contact Parexel International, LLC through a phone number or website you find yourself.
- How much could a Parexel International, LLC data breach settlement or claim be worth?
- There is no set amount, and no Parexel International, LLC settlement is confirmed here. In past data breach settlements, payments depended on what data was exposed and on documented losses — fraud, out-of-pocket costs and time spent dealing with the breach. Keep receipts and records; they're what damages claims are built on.
Other breaches reported in Montana
- MemberSource Credit UnionMontana Attorney General · Filed May 5, 2026Count not stated
- MemberSource Credit UnionMontana Attorney General · Filed May 5, 2026Count not stated
- MemberSource Credit UnionMT Attorney General · Filed May 5, 2026Count not stated
- GrayRobinson P.A.Montana Attorney General · Filed April 24, 2026Count not stated
- GrayRobinson P.A.Montana Attorney General · Filed April 24, 2026Count not stated
- GrayRobinson P.A.MT Attorney General · Filed April 24, 2026Count not stated
Attorney advertising. This page reflects a public regulator filing; it does not mean a lawsuit has been filed or that the company did anything unlawful. Submitting a review request does not create an attorney-client relationship.