Billionaire investor Bill Ackman said that he is interested in taking X, formerly known as Twitter, public less than a year after Elon Musk went through a high-profile and complicated process to buy it and take it private.

Ackman received a regulatory signoff for an investment vehicle, also known as a special purpose acquisition rights company, on Friday. This investment entity could be used to invest in a privately held company and take it public. Ackman, who is an active and prolific poster on X, said that he would "absolutely" consider a transaction with X, which Musk took private last year for $44 billion.

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Ackman said that he has no idea if X would be interested in such a deal, according to the Wall Street Journal. But he said he had "enormous respect" for Musk and his vision for X. A spokesman for X said it had no comment.

The SPARC, known as Pershing Square SPARC Holdings, is expected to have $1.5 billion to invest in a deal, according to filings. Ackman was made to wait two years for approval from the Securities and Exchange Commission to approve the investment entity after he was forced to walk away from a large SPARC deal with Universal Music Group in 2021. He instead purchased a 7.1% share in the company.

Ackman posts often on social media, often promoting his investments at Pershing Square. He gained additional exposure in 2020 when he spoke out in favor of the government taking action to address the coronavirus as well as promoting mass vaccination.

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"It's like one big brain," Ackman has said of X.

Musk bought Twitter in October 2022 for $44 billion, closing the deal after months of trying to back out of it. While Musk initially took the company private, he said he would consider making it public again in a few years.