| 2025-11-18 | Meta Wins FTC Antitrust Case as Judge Rules No Monopoly Despite Instagram/WhatsApp Acquisitions Judge James Boasberg · Meta · Mark Zuckerberg · Federal Trade Commission · +1 |
| confirmed |
| 2025-08-19 | Nexstar-Tegna $6.2 Billion Merger Creates Media Giant Reaching 80% of US Households nexstar-media-group · tegna · Federal Communications Commission |
| confirmed |
| 2025-04-17 | Judge Rules Google Operates Illegal Ad Tech Monopoly, Orders Divestiture of Ad Business Judge Leonie Brinkema · Department of Justice · Google · Sundar Pichai · +1 |
| confirmed |
| 2024-08-05 | Federal Judge Rules Google is Illegal Monopolist in Landmark Search Antitrust Decision Judge Amit Mehta · Department of Justice · Google · Sundar Pichai · +1 |
| confirmed |
| 2024-03-21 | DOJ Sues Apple for iPhone Monopoly Maintained Through Ecosystem Lock-In and Developer Restrictions Department of Justice · Apple · Tim Cook · 16 State Attorneys General |
| confirmed |
| 2023-09-26 | FTC Sues Amazon for Illegal Monopoly Maintenance Through Anti-Discounting and Seller Coercion Federal Trade Commission · Amazon · Andy Jassy · 17 State Attorneys General |
| confirmed |
| 2022-06-14 | FTC Blocks JAB Consumer Partners Veterinary Clinic Roll-Up: Private Equity Monopolization Strategy Federal Trade Commission · JAB Consumer Partners · JAB Holding Company · National Veterinary Associates · +2 |
| confirmed |
| 2022-05-18 | Biden Invokes Defense Production Act for Baby Formula After Abbott Recall Exposes Dangerous Monopoly Joe Biden · Abbott Nutrition · Food and Drug Administration · U.S. Department of Defense |
| confirmed |
| 2020-01-01 | Dialysis Industry Systematically Steers Patients Away from Home Dialysis and Toward High-Profit Commercial Insurance DaVita · Fresenius · American Kidney Fund · Richard Blumenthal · +1 |
| confirmed |
| 2018-10-16 | AbbVie Humira Patent Thicket Delays US Biosimilars Until 2023 Despite 2016 Patent Expiration and European Competition AbbVie · Amgen · Samsung Bioepis · Mylan · +4 |
| confirmed |
| 2018-05-04 | Axon Acquires Main Competitor VieVu, Consolidating 80% Control of Police Body Camera Market Axon · VieVu · Safariland Group · NYPD · +2 |
| confirmed |
| 2016-10-01 | Council of Economic Advisers: Market Power Suppresses Wages, Contributes to $1+ Trillion in Lost Worker Income Council of Economic Advisers · Workers · Dominant firms |
| confirmed |
| 2016-01-01 | Whistleblower Alleges Dialysis Giants DaVita and Fresenius Steer Patients Through American Kidney Fund in $247M Kickback Scheme DaVita · Fresenius Medical Care · American Kidney Fund · Department of Justice · +1 |
| confirmed |
| 2013-01-01 | Four Firms Control 85%+ of Multiple U.S. Industries, Documenting Oligopolistic Market Structure Airlines · Telecom companies · Pharmaceutical companies · Agribusiness |
| confirmed |
| 2007-08-27 | Questcor Raises Acthar Gel Price from $1,600 to $23,000 Overnight - Eventually Reaching 97,000% Increase Through Bribery Scheme Questcor Pharmaceuticals · Mallinckrodt · Federal Trade Commission · Humana · +2 |
| confirmed |
| 2006-12-29 | AT&T Completes $86 Billion BellSouth Acquisition: Bell System Reassembled After 1984 Breakup AT&T Inc. · BellSouth Corporation · Federal Communications Commission · SBC Communications |
| confirmed |
| 2002-01-01 | Insulin Prices Begin Tripling 2002-2013 as Three Manufacturers Control 99% of Market - From $231 to $762 Annually Eli Lilly · Novo Nordisk · Sanofi · Congressional Diabetes Caucus · +1 |
| confirmed |
| 2000-01-01 | Top 10% of Firms Capture 90% of Profit Growth Between 1980-2000, Documenting Monopolization Dominant firms · Smaller competitors |
| confirmed |
| 1982-01-08 | AT&T Breakup Settlement Finalized, Becoming Last Major Antitrust Action for Decades AT&T · Department of Justice · Ronald Reagan · Robert Bork |
| confirmed |
| 1938-06-16 | Temporary National Economic Committee Launches Comprehensive Investigation of Monopoly and Economic Concentration Franklin D. Roosevelt · Joseph O'Mahoney · Thurman Arnold · U.S. Congress · +1 | | confirmed |
| 1938-04-29 | FDR Warns Congress That Concentrated Corporate Power Threatens American Democracy with Fascism Franklin D. Roosevelt · U.S. Congress · concentrated corporate interests | | confirmed |
| 1922-11-01 | Scripps-McRae League Renamed Scripps-Howard as Second-Largest Newspaper Chain Consolidates Power E.W. Scripps · Roy W. Howard · Robert Scripps · Scripps-Howard Newspapers |
| confirmed |
| 1920-03-01 | Supreme Court Dismisses U.S. Steel Antitrust Case, Ruling Size Alone Not Illegal - Enforcement Ends Until 1945 U.S. Supreme Court · Justice Joseph McKenna · Justice Day · U.S. Steel Corporation · +1 |
| confirmed |
| 1920-01-01 | Hearst Newspaper Empire Reaches 28 Papers Controlling One in Four American Readers Through Yellow Journalism Tactics William Randolph Hearst · Hearst Communications |
| confirmed |
| 1911-05-29 | Supreme Court Orders American Tobacco Breakup, Applying Rule of Reason to Tobacco Trust U.S. Supreme Court · Chief Justice Edward White · American Tobacco Company · James Duke |
| confirmed |
| 1911-05-15 | Standard Oil Breakup's Paradox - Rockefeller's Wealth Triples as Fragmented Companies Reconsolidate John D. Rockefeller · Standard Oil Company · U.S. Supreme Court | | confirmed |
| 1911-05-15 | Supreme Court Orders Standard Oil Breakup in Landmark Antitrust Decision U.S. Supreme Court · John D. Rockefeller · Standard Oil Company · Chief Justice Edward White |
| confirmed |
| 1907-07-19 | Roosevelt Justice Department Files Antitrust Suit Against American Tobacco Trust Theodore Roosevelt · U.S. Department of Justice · American Tobacco Company · James Buchanan Duke |
| confirmed |
| 1901-02-25 | U.S. Steel Corporation Formed - First Billion-Dollar Corporation in History J.P. Morgan · Andrew Carnegie · Charles Schwab · U.S. Steel Corporation · +1 | | confirmed |
| 1892-07-01 | Carnegie Steel Company Formed Through Massive Vertical Integration Consolidation Andrew Carnegie · Henry Clay Frick · Carnegie Steel Company | | confirmed |
| 1882-01-02 | Standard Oil Trust Formed - First Modern Corporate Monopoly Structure John D. Rockefeller · Standard Oil Company · Henry Flagler · Samuel C. T. Dodd · +1 | | confirmed |
| 1872-02-17 | Cleveland Massacre - Rockefeller Consolidates Oil Refining Monopoly in Six Weeks John D. Rockefeller · Standard Oil Company · Henry Flagler · South Improvement Company | | confirmed |
| 1870-01-10 | Standard Oil Company Incorporated in Ohio by John D. Rockefeller John D. Rockefeller · Standard Oil Company · Henry Flagler · Samuel Andrews · +1 | | confirmed |
| 1867-01-01 | Vanderbilt Consolidates New York Central Railroad - Creates First Giant Railroad System Cornelius Vanderbilt · New York Central Railroad · Hudson River Railroad · Harlem Railroad | | confirmed |