While not specifically calling out companies by name, the document orders US antitrust officials to "thoroughly investigate whether any online platform has acted in violation of the antitrust laws," while instructing other agencies to return recommendations within a month of Trump signing the EO which could potentially "protect competition among online platforms and address online platform bias." 

The document doesn't name any specific companies. If signed, the order would represent a significant escalation of Trump's antipathy toward Google, Facebook, Twitter and other social media companies, whom he has publicly accused of silencing conservative voices and news sources online.