US SB130

Lowers the merger standard under the Clayton Act from "substantially lessen competition" to "appreciable risk of materially lessening competition," and creates presumptions against acquisitions exceeding $5 billion or involving firms with over 50% market share or $100 billion in assets

Establishes new prohibitions on "exclusionary conduct" by dominant firms (those with over 50% market share), with civil penalties up to 15% of total U.S. revenues or 30% of affected market revenues for violations

Authorizes civil penalties for Sherman Act violations (previously only criminal penalties existed) and allows the FTC to seek civil penalties for antitrust violations in federal court

Creates new FTC offices including an Office of Competition Advocate and Office of Market Analysis and Data, and authorizes $535 million for DOJ Antitrust Division and $725 million for the FTC in fiscal year 2025

Adds whistleblower protections and financial rewards (10-30% of criminal fines exceeding $1 million), prohibits forced arbitration in antitrust class actions, and allows plaintiffs to recover prejudgment interest on treble damages