Elon Musk, the world's richest man, has closed his $44 billion acquisition of Twitter.

"The bird is freed,” Musk tweeted in a seeming reference to the closed deal.

A number of outlets reported that Musk sealed the deal on Thursday October 27, ousting other top executives in the process.

He is said to have fired CEO Parag Agrawal, multiple United States-based media outlets reported, citing people familiar with the matter.

Chief Financial Officer, Ned Segal and Vijaya Gadde, head of legal, policy, and trust, were also let go, according to reports.

Sean Edgett, Twitter’s general counsel, was also fired, the Washington Post reported, citing an unnamed source.

Musk first began ‘flirting’ with the idea of owning Twitter in early April, when he bought 9.2 per cent of the company for $3 billion.

Musk, who earlier changed his Twitter bio to "Chief Twit” also denied any intention to turn Twitter into a "free-for-all hellscape.”

In a tweet posted on October 27, Musk clarified his intentions for acquiring the social media platform, saying, "The reason I acquired Twitter is because it is important to the future of civilisation to have a common digital town square, where a wide range of beliefs can be debated in a healthy manner, without resorting to violence.”

In June, he went on Twitter and shared that people should be able to "say pretty outrageous things within the law” but that they shouldn’t necessarily be amplified.

He is said to have bought the social media platform to help humanity and that he wanted "civilisation to have a common digital town square".