The U.S. Supreme Court issued a ruling on March 4 that expanded whistleblower protections in a way that will have a significant impact on private companies. In Lawson v. FMR LLC, the Supreme Court held that the antiretaliation protections of the Sarbanes-Oxley Act apply not only to public companies, but also to employee whistleblowers of private companies that contract with public companies.

This ruling has immediate implications for employers in a range of industries, such as legal services, accounting, public relations and investment advisers.