Walmart’s Vizio Acquisition to Undergo Full FTC Antitrust Probe

Walmart Inc.’s deal to buy smart-TV maker Vizio Holding Corp. will undergo an in-depth antitrust review by the Federal Trade Commission, Vizio said Tuesday.

Vizio disclosed in a regulatory filing that the companies on Monday received a so-called second request seeking additional information from the antitrust agency. The request was expected. An in-depth review can lengthen the regulatory process by months or years, depending on the complexity of the transaction.

Walmart said in February that it agreed to buy Vizio for about $2.3 billion. The retail giant has said it expects to close the deal in the current fiscal ...