Elon Musk has completed his $44 billion acquisition of Twitter, a source with knowledge of the transaction told CNN on Thursday.

According to two sources with knowledge of the matter, Musk sacked CEO Parag Agrawal and two other executives.

The conclusion of the purchase lifts the cloud of doubt that has lingered over Twitter's company, employees, and stockholders for most of the year. Musk spent months attempting to back out of his April agreement to purchase the company, originally citing concerns about the number of bots on the site and then claims presented by a company whistleblower.

But Musk's takeover and the rapid dismissal of several of the company's senior executives pose a slew of fresh issues about the future of the social media platform and the various facets of society that it affects.

Musk has stated that he intends to rethink Twitter's content moderation policies in favor of a more maximalist approach to "free speech." The billionaire has also stated that he disagrees with Twitter's practice of permanently banning users who repeatedly violate its rules, raising the possibility that several previously banned users could return to the platform.

Perhaps most immediately, many will be observing how quickly Musk follows through on his promise to reinstate former President Donald Trump on the platform.

Musk may single-handedly upend the media and political environment, redefine online public debate, and disrupt the emergence of conservative-leaning social media platforms in response to Twitter's and other major services' bans and limitations.