OSI Systems Data Breach Affects 4,910 Individuals

OSI Systems, Inc., a global provider of specialized electronic systems for security, healthcare, and manufacturing, recently experienced a data breach that exposed sensitive personal information of thousands of individuals.

The breach was discovered on Dec. 25, 2025, after the company detected suspicious activity within its network. Subsequent investigation revealed that unauthorized actors had gained access to certain files on the company’s systems on Dec. 23, 2025.

The breach was perpetrated by the ransomware group INC RANSOM, which claimed responsibility on a dark web posting dated Dec. 30, 2025. The group alleged it had stolen 250GB of data, including confidential documents, client information and financial records.

The attack was classified as a ransomware incident.

OSI Systems took steps to secure its network and engaged third-party forensic specialists to assist with a comprehensive investigation. The company conducted a detailed review to determine which files were accessed and whose information was impacted. This process concluded on Feb. 10, 2026.

The compromised information included names and Social Security numbers, which are considered personally identifiable information (PII).

The breach was reported to the California Attorney General and the Maine Attorney General on March 11, 2026. Impacted individuals were notified in writing on March 11, 2026

In total, 4,910 individuals in the United States were affected by the breach, including seven residents of Maine.

OSI Systems' response

To support affected individuals, OSI Systems is offering complimentary single-bureau credit monitoring and fraud assistance for twelve months through IDX. Impacted individuals notified in writing were provided with an enrollment code and instructions to activate the credit monitoring service.

The company also advised individuals to remain vigilant by reviewing account statements and monitoring their credit reports for suspicious activity. Additional guidance included information on placing fraud alerts or credit freezes and contact details for the three major credit bureaus.

Given the nature of the breach, it is especially important for affected individuals to take advantage of the offered credit monitoring and to be alert for signs of identity theft or fraud.