Senators Seek to Loosen Google’s Grip on Digital Ad Market (1)

A bipartisan group of senators intends to introduce legislation as soon as this week that would force Alphabet Inc.’s Google to sell off parts of its lucrative advertising technology business, according to two people familiar with the matter.

The bill, led by Senator Mike Lee, a Utah Republican, would bar companies with more than $20 billion in digital advertising revenue from owning the tools to help buy and sell online ads and operating the exchange where those transactions occur.

The measure would also compel companies with more than $5 billion in digital advertising revenue to act in customers’ ...