It’s common for entities to face legal action in multiple theaters from different entities stemming from the same events. A well-known example is OJ Simpson first fighting a criminal case, and later a civil case.

Here, the SEC is an administrative entity (part of the executive branch) with the power to levy fines. Now shareholders are filing a civil suit for damages. Sometimes, the SEC will participate in a multi-party settlement that can resolve administrative, civil, and even criminal charges at the same time - but that didn’t happen here.