Rainier Clinical Research Center Suffers Data Breach Affecting 650 Washington Residents Rainier Clinical Research Center, a clinical research facility in Renton, Washington, recently disclosed a data breach impacting at least 650 residents. The incident stemmed from a security compromise at an unnamed IT managed service provider, allowing an unauthorized actor to access the organization’s systems between January 15 and 18, 2026. On February 23, 2026, the ransomware group INC Ransom claimed responsibility for the attack, asserting it had exfiltrated 187 GB of data. A forensic investigation revealed that exposed information included names, driver’s licenses, and Social Security numbers. Rainier Clinical Research Center began mailing notifications to affected individuals on April 6, 2026. In response, the organization is offering 12 months of free identity monitoring services through Kroll, including credit monitoring, fraud consultation, and identity theft restoration. Affected individuals can enroll using a membership number provided in their notification letter, with deadlines specified per recipient. For assistance, the company has established a toll-free call center (844-403-4526) operating Monday through Friday, 9 a.m. to 6:30 p.m. Eastern Time, excluding major U.S. holidays.