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Anti-Monopoly and Collusion Enforcement Section

Responsibilities

The Anti-Monopoly and Collusion Enforcement Section (ACE) is responsible for the enforcement of the antitrust laws, competition advocacy, and competition policy in civil nonmerger matters across a broad range of industries.  ACE focuses on high priority conduct matters to ensure that the statutory timing demands of merger cases do not overtake the Division’s ability to move forward with key civil conduct investigations and litigations.  The Section addresses all industries. Recent industries include:

  • Advertising technology
  • Proteins
  • Real estate
  • Poultry growing
  • Video gaming
  • Smartphones
  • Social media
  • Labor markets
  • Digital platforms

Daniel S. Guarnera, Section Chief

Leadership

Daniel S. Guarnera
Section Chief

Jonathan H. Lasken
Assistant Chief

Timothy Longman
Acting Assistant Chief

Kate Riggs
Assistant Chief

Daniel Guarnera

Federal and State Contacts

In its review and prosecution of nonmerger conduct matters, the ACE works with state attorneys general, the Federal Trade Commission, and a number of other Federal agencies and departments.

Selected Cases and Investigations

Antitrust Division Seal
Contact Information

Mailing address:
450 Fifth Street, NW
11th Floor
Washington, DC 20530