Case file: HERITAGE FINANCIAL CORP /WA/
Every government filing on this incident, the dates as stated, and the days to notice against each state's statute. Built from the records on Nov 15, 2026, agency link on every row. Not legal advice.
The incident
- Breach window
- Not stated in the filings
- Discovered
- Mar 2, 2026, as stated in the SEC Form 8-K letter
- First public signal
- Mar 23, 2026, when HERITAGE FINANCIAL CORP /WA/ told investors of a cyber incident in an SEC Form 8-K (Item 8.01). No agency record of the incident is on file yet
- State and federal records
- 1 filing, Mar 23, 2026
- Residents counted
- No state publishes a resident count for this incident
- Everyone affected
- No filing gives a total
- Information exposed
- Financial / bank account
- Offered to those affected
- No monitoring offer found in the letters we read
- Third party named
- No
The letter: "Item 8.01 Other Events On or about March 2, 2026, Heritage Financial Corporation (the “Company”) detected a cybersecurity incident involving an internal file share server used by employees and the exfiltration of files from that file sha..."
The investor filing: Form 8-K of Mar 23, 2026. An 8-K is tied to the incident by the company and the dates, so read it before relying on it. It says: "On or about March 2, 2026, Heritage Financial Corporation (the “Company”) detected a cybersecurity incident involving an internal file share server used by employees and the exfiltration of files from that file share server which may contain personal information. The Bank’s customer accounts, customer systems and operations were not impacted."
Filings
| Agency | Record date | People | In total | Days to notice | Links |
|---|---|---|---|---|---|
| SEC Form 8-K SEC Form 8-K | Mar 23, 2026 | Not published | 21 days | 8-K Record |
People is the count the filing gives, residents of the state unless marked total. Days to notice runs from the discovery date the letter states, or from the end of the breach window when no letter states one, to the date on the state's first record of the incident. "Over" marks a count past the days the state's statute allows for notice to residents. The statute's trigger is a question of fact, the days are arithmetic.
Sources and method
Records as published by SEC Form 8-K. Letter facts (discovery date, monitoring, third party) are read from the consumer letter the agency posted, 1 letter read for this incident, and quoted so you can check them. Texas and HHS publish no letters. First-seen times on each record page. Spot an error? Email support@breachtally.com with this page link.