S. 510 · 117th Congress Ultra-Millionaire Tax Act of 2021 StageIn committee SponsorElizabeth Warren Introduced2021-03-01 Latest action2021-03-01 · Introduced in Senate Follow Summary Text Subjects Cosponsors (8) Votes (0) Actions Cosponsors (8) Alex Padilla Current member Senate CA Democrat Kirsten Gillibrand Current member Senate NY Democrat Mazie Hirono Current member Senate HI Democrat Ed Markey Current member Senate MA Democrat Jeff Merkley Current member Senate OR Democrat Bernie Sanders Current member Senate VT Independent Brian Schatz Current member Senate HI Democrat Sheldon Whitehouse Current member Senate RI Democrat