• The news was confirmed byDemocratic Rep. David Cicilline of Rhode Island.
  • Zuckerberg, Pichai, and Bezos had all reportedly been confirmed by mid-June, although Zuckerberg and Pichai said they would only testify if Cook did too.
  • Cook now appears to have agreed to testify.
  • Visit Business Insider's homepage for more stories .

The CEOs of Facebook, Google, Apple, and Amazon will all testify before Congress later this month.

Democratic Rep. David Cicilline of Rhode Island confirmed to journalist Kara Swisher on Wednesday, July 1, that Facebook's Mark Zuckerberg, Google's Sundar Pichai, Apple's Tim Cook, and Amazon's Jeff Bezos will all testify before Congress in an antitrust hearing in late July.

Reports surfaced last month that the House Judiciary Committee had asked the four CEOs to attend the hearing, and Cicilline told Bloomberg subpoenas could be used to compel them to attend.

Amazon , Facebook, and Google all reportedly confirmed by mid-June that they would send their CEOs, but Facebook and Google said Zuckerberg and Picha would only attend if Cook did too.

Cicilline's latest comments suggest Cook has now confirmed his attendance.

Politico reported in June that the US Department of Justice was preparing to launch a probe into how the App Store deals with developers .

Apple is also facing fresh antitrust scrutiny in the EU. On June 17, the European Commission announced it was launching two antitrust probes into Apple Pay and the App Store .

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