In a landmark antitrust case, the government will ask a judge to force the company to sell its popular Chrome browser, people with knowledge of the matter said.

The Justice Department and a group of states plan to ask a federal court late Wednesday to force Google to sell Chrome, its popular web browser, two people with knowledge of the decision said, a move that could fundamentally alter the $2 trillion company’s business and reshape competition on the internet.

The request would follow a landmark ruling in August by Judge Amit P. Mehta of the U.S. District Court for the District of Columbia that found Google had illegally maintained a monopoly in online search. Judge Mehta asked the Justice Department and the states that brought the antitrust case to submit solutions by the end of Wednesday to correct the search monopoly.

Beyond the sale of Chrome, the government is set to ask Judge Mehta to bar Google from entering into paid agreements with Apple and others to be the automatic search engine on smartphones and in browsers, the people said. Google should also be required to share data with rivals, they said.

The proposals would likely be the most significant remedies to be requested in a tech antitrust case since the Justice Department asked to break up Microsoft in 2000. If Judge Mehta adopts the proposals, they will set the tone for a string of other antitrust cases that challenge the dominance of tech behemoths including Apple, Amazon and Meta.

Being forced to sell Chrome would be among the worst possible outcomes for Google. Chrome, which is free to use, is the most popular web browser in the world and part of an elaborate Google ecosystem that keeps people using the company’s products. Google’s search engine is bundled into Chrome.

Google is set to file its own suggestions for fixing the search monopoly by Dec. 20. Both sides can modify their requests before Judge Mehta is expected to hear arguments on the remedies this spring. He is expected to rule by the end of the summer.

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