HSM excels in the defense and prosecution of complex, high-stakes antitrust cases and vigorously advocates for our clients before enforcers at the DOJ, FTC, and state attorneys general. Our attorneys have deep experience in class action defense, private party litigation, and government investigations and enforcement, and include a former senior DOJ antitrust enforcer.  We also represent whistleblowers and qui tam complainants, ensuring that they are protected and rewarded when they choose to stand up for fair competition.