Heritage Financial Corporation (CIK 0001046025) filed an 8-K on March 20, 2026, reporting a cybersecurity incident detected on March 2, 2026. The incident involved unauthorized access to an internal file share server and subsequent exfiltration of files potentially containing personal information. Customer accounts and operations were not impacted. The company took the system offline, engaged forensic investigators and legal counsel, and notified regulators and law enforcement. The company stated the incident was not material.