Zarema's practice focuses on complex antitrust matters including government investigations, M&A transactions, and complex litigation, including high-stakes class action defense. Zarema regularly advises clients on enforcement matters before state and federal agencies, and regularly counsels on competition issues, including refusals to deal, distribution and franchising restraints, tying arrangements, group purchasing, price discrimination, exclusive dealing, leveraging, joint ventures, and trade association activities. She also counsels clients contemplating complex transactions that may be affected by antitrust statutes including Hart-Scott-Rodino. In addition, Zarema advises clients on compliance with U.S. and foreign anti-bribery and anti-corruption regulations, U.S. sanctions and export controls, and foreign investment reporting requirements.