WASHINGTON, Sept 29 (Reuters) - The U.S. House of Representatives Judiciary Committee's antitrust subcommittee is expected to release a much anticipated report into antitrust allegations against four of America's largest tech companies as soon as Monday, Oct. 5, according to a source with direct knowledge of the matter.

The chief executives of four of the world's largest tech companies, Amazon.com Inc, Facebook Inc, Apple and Alphabet's Google testified before the panel in July. (Reporting by Nandita Bose; Editing by Sandra Maler)