Nov 4 - By The Associated Press, Only on msnbc.com
New York's attorney general has filed an antitrust lawsuit against Intel Corp., claiming the company used "illegal threats and collusion" to dominate the marketplace for computer microprocessors.

Nov 4 - By David B. Caruso, Associated Press Writer
The legal challenges to Intel Corp.'s sales tactics mounted Wednesday as New York's attorney general accused the world's biggest computer chip maker of using "illegal threats and collusion" to dominate.
Oct 30 - By Associated Press
A federal judge has dismissed an antitrust lawsuit against the University of Pittsburgh Medical Center and insurer Highmark Inc.
Oct 29 - By Associated Press
The union representing flight attendants at American Airlines is supporting the company's bid to win antitrust immunity and work more closely with British Airways and Iberia.
Oct 22 - By Associated Press
Speaker Nancy Pelosi says she'll include a measure removing health insurers' federal antitrust exemption in sweeping health care legislation pending in the House.
Oct 14 - By Associated Press
Frustrated with health insurers, Democratic lawmakers are calling for revoking the industry's antitrust exemption.
Oct 9 - By Associated Press
The pilots' union at American Airlines said Friday it opposed antitrust immunity for the carrier's proposed joint venture with British Airways and Iberia.
Oct 8 - By Joelle Tessler, AP Technology Writer
After eight years of light antitrust scrutiny under a Republican White House, the technology and telecommunications industries are bracing for stepped up oversight by the Obama administration's Justice Department.
Oct 8 - By Christopher Leonard, AP Business Writer
The Justice Department is investigating whether Monsanto Co. violated antitrust rules in trying to expand its dominance of the market for genetically engineered crops.

Oct 7 - By Jordan Robertson, AP Technology Writer
The Justice Department is looking into allegations that IBM Corp. has abused its dominant position in the market for mainframe computers, the data-crunching heavy lifters of the computing world that IBM introduced in the 1960s and which are now used to process some of the most sensitive data in banking, government and health care.
Sep 29 - By Associated Press
The European Union's top antitrust official warned drug makers Tuesday to "look out" for new investigations in coming months.
Sep 22 - By Christopher S. Rugaber, AP Economics Writer
The federal government's antitrust enforcers said Tuesday they will update the 17-year-old guidelines used to determine whether a proposed corporate acquisition threatens competition.

Aug 23 - By Joelle Tessler, AP Technology Writer
Yahoo Inc. and Microsoft Corp. hope that by joining forces, they can tilt the balance of power in Internet search away from Google Inc. First, however, Yahoo and Microsoft have to convince regulators that their plan won't hurt online advertisers and consumers.
Jul 29 - By Christopher S. Rugaber, AP Economics Writer
The Internet search partnership between Microsoft and Yahoo faces a tough antitrust review in the U.S. and overseas, with approval likely hinging on whether the marriage would foster more competition with market leader Google.
Jul 10 - By David Koenig, AP Airlines Writer
The Transportation Department on Friday granted Continental Airlines Inc. immunity from antitrust laws, allowing it to work closely with a group of other carriers, including United Airlines, on international service.
Jul 7 - By Associated Press
Continental, United and eight other airlines say the Justice Department's opposition to their bid for broad antitrust immunity was based on shortsighted analysis that ignored conditions in the airline industry.
Jul 6 - By Associated Press
The Justice Department is starting a review of whether the largest U.S. telecommunications carriers engage in anticompetitive behavior, the Wall Street Journal reported Monday.
Jun 29 - By David Koenig, AP Airlines Writer
The Justice Department opposes Continental Airlines Inc.'s broad request for antitrust immunity to work more closely with United Airlines and other carriers in setting prices and schedules for international service.
Jun 10 - By Michael Liedtke, AP Business Writer
Google Inc. doesn't believe it needs to change its ways despite three separate U.S. government inquiries into whether some of the Internet search leader's actions are thwarting competition.
May 20 - By Ricardo Alonso-Zaldivar, Associated Press Writer
Activists backing President Barack Obama's health care overhaul are asking the Justice Department to open a wide-ranging investigation of what they say is monopoly-like power in the hands of major insurers.
May 18 - By Associated Press
American Airlines said Tuesday that dozens of politicians from Congress to city halls back its request to work more closely with British Airways on trans-Atlantic flights.
May 11 - By Marcy Gordon, AP Business Writers
From busting up John D. Rockefeller's Standard Oil Trust in 1911 to going after Microsoft's use of its Windows monopoly, antitrust policy has been an important element of the U.S. regulatory landscape.

May 10 - By Devlin Barrett, Associated Press Writer
The Obama administration warned corporate America on Monday that the government will more aggressively investigate big firms that hurt smaller competitors, contending that lax enforcement by the Bush administration contributed to the current economic troubles.
Apr 10 - By Jessica Mintz, AP Technology Writer
The Justice Department asked a federal judge Thursday to extend its watch over some of Microsoft Corp.'s business practices for a second time, saying it needs an extra year and a half to make sure Microsoft's antitrust compliance passes muster.
Mar 18 - By Associated Press
Attorney General Eric Holder said Wednesday he is open to re-examining government antitrust policies that limit mergers in the struggling newspaper industry.