The Justice Department is looking to break up one of America’s most powerful companies following a court ruling in September that found Google violated antitrust law. Shares of Google-parent Alphabet plunged over 5% Thursday after prosecutors outlined proposed remedies that would significantly alter how the search giant conducts its business.

Alphabet's Google must sell its Chrome browser, share data and search results with rivals and take other measures - including possibly selling Android - to end its monopoly on online search, prosecutors argued to a judge on Wednesday.