Quinn Emanuel Urquhart & Sullivan, LLP

Dan Koffmann represents companies and executives in sensitive matters involving investigations, trials, and other business, legal, and reputational crises. He advises clients on a broad range of litigation and compliance issues, including alleged corruption, securities fraud and insider trading, sanctions and export control violations, tax evasion, accounting fraud, money laundering, and civil and criminal forfeiture proceedings. He also brings affirmative claims against government regulators and agencies when statutes, regulations, and other government actions infringe on clients’ rights. Dan’s practice is global, and many of his matters involve defending foreign individuals and organizations facing scrutiny from U.S. prosecutors and regulators. He has represented clients and conducted internal investigations in the United States, Europe, Africa, the Middle East, and Asia, and he is particularly active in Latin America and the Indian Subcontinent.

Dan is an accomplished trial and appellate advocate.  He has tried numerous federal criminal cases to verdict and has briefed and argued appeals in several federal Courts of Appeals and New York’s First Department.  Most of Dan’s work, however, is out of the public eye, assisting clients in avoiding indictment or other media scrutiny altogether.  He regularly persuades prosecutors, regulators, and other adversaries to decline prosecution or enter into negotiated resolutions on favorable terms.  In recognition of his achievements, legal periodicals including Law360, Legal 500, and others have identified Dan as a rising star of the white collar bar.  Most recently, Daily Journal named Dan to its 2025 list of Top White Collar Lawyers in California.

Dan also publishes The White Collar Appeal, a newsletter that identifies and analyzes federal appellate decisions that are relevant to business crimes and other white collar defense issues.