McDonald’s says Cargill, JBS, Tyson and National Beef secretly worked together over the past decade to limit supplies of cattle and fix prices, according to a federal lawsuit filed this month. Those Big Four meatpackers collectively control 85% of the beef industry in the U.S.

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McDonald's has filed a lawsuit against the nation's largest meat packers—Tyson, JBS, Cargill, and National Beef—accusing them of conspiring to fix beef prices by limiting supply to inflate costs.

The chain accused the companies of anticompetitive measures, such as collectively limiting supply, to boost prices

McDonald's states that in early 2015, beef prices started to change "without any credible, non-collusive explanation."

McDonald's names Wayzata-based Cargill, JBS, Tyson Foods, and other meat producers in the lawsuit. Here's what we know.

McDonald’s has sued JBS, Tyson Foods and other leading meat processing and packing companies for allegedly conspiring for years to limit beef supplies, boosting their profits while causing the fast food giant to pay artificially higher prices.

McDonald's has filed a federal complaint in New York against the U.S. meat industry's top companies, including Tyson, JBS, Cargill and National Beef Packing Company, accusing them of colluding to inflate beef prices.

This collusion caused the beef market to become “a monopoly in which direct purchasers were forced to buy at prices dictated by (the meat packers),” McDonald’s suit reads — later noting that the injury it has sustained as one of those buyers is what “antitrust laws were designed to prevent.”

Most people are all too familiar with driving through the McDonald's drive-thru and ordering a Happy Meal. There is nothing like the joy of opening the bright red and yellow box to enjoy some fresh salty fries while sipping a crisp Coke and then reaching for a McDonald's hamburger.