The U.S. House Judiciary Committee’s Report on Digital Markets represents a landmark in the latest round of efforts to subject the “big tech” companies to antitrust scrutiny.

The Report, clocking in at over 400 pages, and published after a thorough set of hearings, sets out detailed concerns primarily with respect to the conduct of Google, Apple, Facebook, and Amazon, all of whom are alleged to operate dominant “platform” businesses. Significantly, the report was also issued in the context of various investigations by Federal, state, and international agencies into these companies’ conduct. Its political salience can therefore scarcely be underestimated.