Breach may have occurred almost nine years ago, on August 25, 2010, and was uncovered only recently following an internal alert. Data may include names and postal addresses, dates of birth, email addresses, social security numbers, taxpayer IDs, bank details, as well as member ID, group, and subscriber numbers. Data belonging to producers and healthcare providers was also present on the affected servers. The company contacted the FBI about the security incident and will cooperate with authorities for the run of their investigation.
Source: https://www.bleepingcomputer.com/news/security/dominion-national-discovers-breach-9-years-after-it-happened/