Google bought 270 companies since 2001, Facebook bought 92 since 2007, some direct or nascent competitors; only one Google acquisition was challenged by the US (New York Times)

New York Times:
Google bought 270 companies since 2001, Facebook bought 92 since 2007, some direct or nascent competitors; only one Google acquisition was challenged by the US  —  “Big tech” companies like Google and Facebook are, in reality, the products of hundreds of mergers.