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iRhythm reports material cybersecurity breach involving unauthorized access to third-party applications and potential patient data exfiltration
IRTCiRhythm Holdings, Inc.
iRhythm Holdings, Inc. reported a material cybersecurity incident involving unauthorized activity in third-party-hosted business applications on June 8, 2026. A threat actor claimed to have exfiltrated sensitive information, including proprietary data and patient protected health information, and demanded payment to prevent disclosure. The company determined the incident is material, though it has not identified any impact to its clinical, medical device systems, or financial reporting systems. iRhythm Holdings, Inc. is a healthcare technology company providing cardiac monitoring services.