Heritage Financial Corporation Reports Cybersecurity Incident – No Customer Data or Operations Impacted

Key Highlights:

• Heritage Financial Corporation (NASDAQ: HFWA) detected a cybersecurity incident involving an internal file share server on or about March 2, 2026.
• The incident involved the exfiltration of files from an internal server, which may contain personal information.
• Critically, customer accounts, customer systems, and bank operations were not impacted by the incident.
• The company rapidly initiated its security incident response plan, taking the affected system offline and deploying additional security measures.
• There was no disruption to company operations; business has continued as normal.
• Heritage Financial has engaged external cybersecurity and forensic experts, legal counsel, and notified its banking regulators, law enforcement, and cyber insurance carrier.
• As of the filing date, the company has not deemed the incident material, nor does it expect a material impact on its financial condition or results of operations.

Details for Investors:

On March 20, 2026, Heritage Financial Corporation disclosed in a Form 8-K filing that it had detected a cybersecurity incident on or about March 2, 2026. According to the report, the incident was isolated to an internal file share server used by employees and involved the unauthorized exfiltration of files. Some of these files may contain personal information.

Importantly, no customer accounts, customer systems, or bank operations were affected by this incident. The company stressed that their core banking operations continued without interruption, and there were no disruptions to their services or customer-facing systems.

Upon discovery, Heritage Financial acted swiftly, initiating a comprehensive security response plan. This included taking the affected server offline and implementing additional security controls to prevent further unauthorized access. The company has also launched a thorough investigation into the incident and engaged external cybersecurity consultants, a forensic investigation firm, and legal counsel to support the assessment, containment, and remediation of the issue.

Additionally, the company has promptly notified relevant banking regulators, law enforcement agencies, and its cyber insurance carrier, demonstrating a proactive and transparent approach to managing the incident.

As of the date of the Form 8-K filing, Heritage Financial noted that the incident is still under investigation. The company has not determined the incident to be material and does not believe it is reasonably likely to have a material impact on its financial condition or results of operations at this time. However, the company cautioned that the situation is evolving, and the financial and operational impacts could change should new information arise.

The company also highlighted that statements regarding the response to the incident, insurance coverage, and assessments of operational or financial impact are forward-looking statements and are subject to risks and uncertainties that could cause actual results to differ materially.

Potential Share Price Impact

• This disclosure is important for shareholders as cybersecurity incidents can carry reputational, regulatory, and potential financial risks, even if the initial assessment is that the incident is not material.
• Given that no customer data or operations were impacted, and business continues as normal, the immediate risk to share value appears limited based on current information.
• However, investors should monitor the situation for updates, as the outcome of the ongoing investigation could alter the company’s assessment of the incident’s materiality in the future.

Shareholders are encouraged to review further updates from the company and remain attentive to any changes in the company’s risk profile or financial guidance.

Disclaimer: This article is for informational purposes only and does not constitute investment advice. The situation described is evolving and subject to further updates from Heritage Financial Corporation. Investors should consult the company’s official filings and speak with a financial advisor before making any investment decisions.

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