Current and former Parker-Hannifin employees and customers in the U.S. may be covered by a proposed class action alleging Parker-Hannifin failed to protect their personal and health information in a data breach on or around October 16, 2026. No class has been certified and there is nothing to file yet.
Allegations Only · No Settlement Yet
This article describes a class action complaint. The statements below are unproven allegations. Parker-Hannifin has not been found liable, there is no certified class, and nothing to claim at this time. This page is informational. It is not legal advice.
What Is This About?
Parker-Hannifin Corporation, the Ohio-based maker of motion and control technologies, was sued on October 19, 2026 in a proposed class action over an alleged data breach. The case is Hill v. Parker-Hannifin Corporation, No. 1:26-cv-02743, in the U.S. District Court for the Northern District of Ohio, assigned to Judge Pamela A. Barker. The complaint alleges that on or around October 16, 2026, someone gained unauthorized access to Parker-Hannifin's IT network, and that a cybercriminal group called "Redact" has since claimed responsibility and claims to have taken 10.9 terabytes of data. The plaintiff alleges that the personally identifiable information and protected health information of current and former employees and customers was stolen. These are allegations; Parker-Hannifin has not responded in court, and nothing has been proven.Free settlement alerts
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What Has Parker-Hannifin Said?
As of October 20, 2026, OCA found no public statement from Parker-Hannifin confirming a breach, describing what was accessed or saying how many people may be affected. The company had not filed a report about a cybersecurity incident with the SEC, and no Parker-Hannifin breach notice had been posted to the California Attorney General's data breach list. The complaint itself rests on the Redact group's claim of responsibility, which has not been independently verified.This would not be Parker-Hannifin's first incident. In a 2022 SEC filing, the company said it had detected that a third party gained unauthorized access to its systems and that some data, which may have included personal information of its team members, was accessed and taken. Nothing in the new complaint ties the two events together.
Who Is Included in the Proposed Class?
The complaint proposes a nationwide class of all persons residing in the United States whose private information was compromised in the data breach, describing them as current and former Parker-Hannifin employees and customers. Parker-Hannifin and its affiliates, officers and directors, and the judges assigned to the case are excluded. A court has not certified any class, and the plaintiff can change the definition before it does.What Does the Lawsuit Seek?
The complaint brings claims for negligence, breach of implied contract and, in the alternative, unjust enrichment (breach of contract implied in law). It asks for actual, statutory, punitive and nominal damages, restitution and disgorgement, and for court orders requiring stronger data security and extended credit monitoring and identity theft protection. The plaintiff is represented by Markovits, Stock & DeMarco and Milberg.What Happens Next?
Parker-Hannifin has not yet answered the complaint. Data breach suits filed this early often draw copycat cases that are later consolidated, and the company may still issue formal breach notices that confirm or rule out what the hacking group claims. Any notice would show what information was involved and who was affected. There is nothing to claim unless the case settles and a court approves a claims process.Questions
Has Parker-Hannifin confirmed a data breach?
As of October 20, 2026, OCA found no public confirmation from Parker-Hannifin. The company had not filed an SEC report about a cybersecurity incident, and it had not said what information, if any, was taken or how many people may be affected. The complaint relies on a claim of responsibility posted by a hacking group called Redact around October 16, 2026.
Who is included in the proposed Parker-Hannifin class?
The complaint proposes a class of all persons residing in the United States whose private information was compromised in the data breach. It describes those people as current and former Parker-Hannifin employees and customers. No class has been certified, and the definition can change.
Is there a Parker-Hannifin settlement or claim form?
No. The case was filed on October 19, 2026 and is at the complaint stage. There is no settlement, no claim form and nothing to file. If the case settles, a court-approved notice would explain who qualifies and how to claim.
What information does the lawsuit say was exposed?
The complaint alleges that personally identifiable information and protected health information of employees and customers was stolen, but it does not list specific data fields. It cites the Redact group's claim to have taken 10.9 terabytes of data. Parker-Hannifin has not publicly described what was accessed, and none of these allegations has been proven.
Sources and Verification
• Class Action Complaint, Hill v. Parker-Hannifin Corporation, No. 1:26-cv-02743 (N.D. Ohio, filed October 19, 2026)• Court docket, CourtListener
• Parker-Hannifin Form 8-K, 2022 cybersecurity incident disclosure, SEC EDGAR
