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We are a boutique antitrust law firm focused on helping our clients anticipate and respond to the rapid developments in competition law

We Do

Regulatory Advocacy

We are experienced at advocating on behalf of our clients in front of federal, state, and foreign antitrust enforcers and regulators.


We assist companies in all facets of antitrust litigation, including assessing the strengths of potential lawsuits, bringing or defending against antitrust claims, and responding to litigation as a third-party.

What We Offer

Merger Counseling

We help our clients assess the antitrust risks and pitfalls that might result from potential mergers and acquisitions, and we guide them through every step of the merger clearance process.

Legislative Advocacy

We advise our clients on the potential effects of proposed changes of federal and state antitrust laws, and we help them develop and execute strategies to engage proactively with legislators and other stakeholders.

Antitrust Compliance

We help our clients understand their responsibilities under the antitrust laws and to recognize and mitigate areas of potential risk.


Brandon Kressin | Partner

Brandon is the founding partner of Kressin Law Group. He is an antitrust lawyer with deep experience in all areas of antitrust, having represented clients on an array of issues in a wide variety of industries. He focuses especially on cases involving rapidly evolving technology markets, and he has worked at the center of the most high profile antitrust cases of the past decade, both in the US and abroad. He specializes in helping clients develop and execute multi-pronged antitrust strategies that tie together regulatory, litigation, and public advocacy components.

Zach Martin | Counsel

Zach is a litigator whose practice focuses on antitrust and commercial litigation. He has represented and advised clients in a wide range of industries, including technology, blockchain and distributed ledger, manufacturing, and logistics. Zach has represented clients before numerous state and federal courts and arbitral tribunals around the country.

Patrick Greco | Counsel

Patrick counsels clients on a broad range of antitrust matters, including mergers and acquisitions, antitrust compliance, regulatory filings, and federal civil investigations. He has experience in private antitrust litigation and has represented clients in actions brought by regulatory agencies. He has represented clients in several industries, including technology, healthcare, pharmaceuticals, publishing, airlines, food and beverage, and financial services.

Christian Lorenz | Of Counsel

Christian's practice involves counseling clients in the full range of antitrust matters, including mergers and acquisitions, joint ventures, and in connection with civil and criminal investigations in the US and around the world. He has represented clients in matters involving a wide variety of industries, including software, pharmaceuticals and healthcare, auto parts, financial, and airlines. Christian was named a “Rising Star” in Washington, D.C. by Super Lawyers magazine (2013-2017).

Tara O'Malley | Clerk

Tara has experience working in government agencies and private practice. She has counseled clients on issues anticompetitive and unfair practices and other matters related to antitrust enforcement. While in law school, Tara served as a law clerk in the U.S. Attorney's Office, District of Maryland and in the Litigation Bureau of the New York State Office of the Attorney General. As a law student, Tara's research focused on issues of antitrust law and public corruption.

Catherine Larsen | Associate

Catherine has extensive experience in government and public policy as well as in private antitrust practice. In addition to years working in state and city government, she recently served as a Special Assistant to the House Judiciary Committee’s Subcommittee on Antitrust, Commercial and Administrative Law and co-authored the Report on its Investigation into Competition in Digital Markets. Catherine has also counseled clients on a range of matters, including litigation, advocacy before regulatory agencies, and state and federal antitrust legislation in relation to varied technology markets.

Our Team
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