Texas attorney general to lead effort examining impact of Google on digital advertising markets; New York attorney general to helm Facebook review, citing concerns over control of personal data

WASHINGTON—State attorneys general are formally launching separate antitrust probes into Facebook Inc. and Alphabet Inc. ’s Google unit starting next week, according to people familiar with the matter, putting added pressure on tech giants already under federal scrutiny.

The Google probe is expected to be announced at a news conference outside the U.S. Supreme Court on Monday, with a bipartisan group of about three dozen state attorneys general joining the effort, the people said.

The investigation will be led by Texas Attorney General Ken Paxton, a Republican, the people said. The attorneys general will examine the impact of Google on digital advertising markets, this person said, as well as potential harms to consumers from their information and ad choices being concentrated in one company.

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