S. 4107 · 119th Congress Antitrust Accountability and Transparency Act StageIn committee SponsorAmy Klobuchar Introduced2026-03-17 Latest action2026-03-17 · Introduced in Senate Follow Summary Text Subjects Cosponsors (8) Votes (0) Actions Cosponsors (8) Richard Blumenthal Current member Senate CT Democrat Cory Booker Current member Senate NJ Democrat Richard Durbin Current member Senate IL Democrat Mazie Hirono Current member Senate HI Democrat Christopher Murphy Current member Senate CT Democrat Elizabeth Warren Current member Senate MA Democrat Peter Welch Current member Senate VT Democrat Sheldon Whitehouse Current member Senate RI Democrat