Kurt J. Lesker Company, a Pennsylvania-based manufacturer and distributor of vacuum technology products, notified individuals about a data event involving personal information. The available report states that outside security researchers reported the underlying incident around December 2, 2025, and that a Massachusetts notification was dated September 11, 2026.
The company has not publicly disclosed the number of affected individuals or specific personal information involved. Public reporting about the underlying incident describes internal company files, including engineering and manufacturing records, but does not confirm exposure of Social Security numbers, medical information, or financial information. The available materials do not establish the exact date of the incident, the date the company discovered it, or whether other states were affected.