The U.S. House of Representatives Judiciary Committee on Thursday approved a scathing 450-page report advocating legislation to rein in Big Tech's expansive powers. The report, released in October, recommends an overhaul of antitrust law to counter the growing influence of tech behemoths such as Google parent Alphabet Inc. /zigman2/quotes/202490156/composite GOOGL +0.62% /zigman2/quotes/205453964/composite GOOG +0.73% , Facebook Inc. /zigman2/quotes/205064656/composite FB -0.29% , Apple Inc. /zigman2/quotes/202934861/composite AAPL +0.53% , and Amazon.com Inc. /zigman2/quotes/210331248/composite AMZN -0.45% . "Amazon, Apple, Google, and Facebook each hold monopoly power over significant sectors of our economy. This monopoly moment must end," Rep. David Cicilline, D-R.I., chairman of the Judiciary Committee's Antitrust Subcommittee, said in a statement. "Now that the Judiciary Committee has formally adopted our findings, I look forward to crafting legislation that addresses the significant concerns we have raised."