Published
July 9, 2023
Updated
July 13, 2026
If you are a current or former MKS Instruments employee, your sensitive personal and health information may have been exposed — here is what happened and how to check your eligibility.
Investigation · Allegations Only
This page describes an investigation into a reported data breach. The statements below are unproven allegations, and this page is informational, not legal advice. Eligibility and any recovery would depend on the facts of an individual case.
What is the MKS Instruments Data Breach?
If you are a current or former employee of MKS Instruments, your information may have been exposed in a data breach!
Status
No Longer Accepting Submissions
This investigation has closed to new submissions — a licensed attorney may still be able to help.
Claim Deadline
Ongoing
No settlement or claim form yet — this is an intake investigation
Estimated Payout
Varies
Depends on the facts of each case
Proof Required
Yes
Your data breach notice letter from MKS Instruments
MKS Instruments produces semiconductor products and is the U.S. parent company of MKS and Atotech companies. Recently MKS Instruments disclosed a security breach to their computer system which exposed the sensitive personal information and protected health information of an unknown number of employees.
What Should I Do If My Data Was Hacked?
If you believe you have been the victim of the data breach, and may have received a notice, there are several steps you should take to protect yourself and mitigate the potential damage. These apply more broadly to a wider plethora of data breach cases:- Stay Calm: Discovering your data has been compromised in a data breach can be alarming, especially if it is not your fault, but it's important to remain calm and take immediate action to protect your information.
- Confirm the Breach: Verify that the data breach has actually occurred and that your personal information has been compromised. Look for official announcements from the affected organization or reputable sources reporting the breach.
- Change Your Passwords: Start by changing the passwords for the affected account(s) immediately. Choose strong, unique passwords that are not easily guessable. It's best to use a password manager to securely store and generate passwords.
- Enable Two-Factor Authentication (2FA): Activate two-factor authentication for all your online accounts whenever possible. This adds an extra layer of security by requiring a secondary verification method, such as a temporary code sent to your mobile device, in addition to your password.
- Monitor Your Accounts: Regularly monitor your financial and online accounts for any suspicious activity. Keep an eye out for unauthorized transactions, unfamiliar logins, or changes to your personal information.
- Notify Your Bank/Credit Card Companies: If your financial information has been compromised, contact your bank and credit card companies immediately. Report the breach and inquire about any additional security measures they can provide, such as monitoring your accounts for fraudulent activity.
- Check Your Credit Reports: Request a free copy of your credit report from one of the major credit reporting agencies (Equifax, Experian, or TransUnion). Review the report for any unauthorized accounts or inquiries. Consider placing a fraud alert or credit freeze on your accounts for added protection.
- Be Vigilant Against Phishing Attempts: Data breaches often lead to an increase in phishing attempts. Be cautious of suspicious emails, messages, or phone calls asking for personal information. Avoid clicking on suspicious links or downloading attachments from unknown sources.
- Update Software and Use Antivirus Protection: Ensure that your computer, smartphone, and other devices are running the latest software updates. Install reputable antivirus and anti-malware software to protect against potential threats.
- Stay Informed and Seek Assistance: Keep yourself updated on the progress of the data breach investigation. The affected organization may provide guidance or resources for affected individuals. If necessary, consider seeking legal advice or contacting relevant authorities for further assistance.
What Affected Individuals Should Know
If you received a letter from MKS Instruments notifying you that your personal information was impacted in their data breach, the notice below explains the current status of this investigation and other steps you may consider.This Investigation Is No Longer Accepting Submissions
OpenClassActions is no longer collecting submissions for this investigation, and there is no settlement or public claim form at this time. This page remains online for reference.
If you believe you were affected, you may still be able to pursue a claim by speaking with a licensed attorney of your choosing. You can also browse our open class action settlements and active investigations to see what is currently accepting claims.
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