US SB4147

Amends the Clayton Act to expand price discrimination prohibitions from "commodities" to "products or services" and from transactions "in commerce" to those "in commerce or in any activity affecting commerce"

Removes the "meeting competition" defense that previously allowed sellers to justify lower prices by matching a competitor's pricing

Makes it unlawful for any person to induce or receive the benefit of price discrimination, with retailers under $100 billion in annual sales only liable if they "knowingly" induced or received the benefit

Creates a presumptive damages rule where plaintiffs who prove unlawful discrimination are automatically entitled to damages equal to the monetary amount of the discrimination, plus any additional proven damages

Applies to transactions occurring on or after the date of enactment; introduced March 19, 2026 by Senator Murphy and referred to the Senate Judiciary Committee