Elon Musk threatened Monday to call off his $44 billion acquisition of Twitter, accusing the company of refusing to give him information about spam bot accounts.

Here’s a look at some of what’s transpired between the billionaire Tesla CEO and the social media platform.

January 31: Musk starts buying shares of Twitter in near-daily installments, amassing a 5% stake in the company by mid-March.

March 26: Musk, who has 80 million Twitter followers and is active on the site, said that he is giving “ serious thought ” to building an alternative to Twitter, questioning free speech on the platform and whether Twitter is undermining democracy. He also privately reaches out to Twitter board members, including his friend and Twitter co-founder Jack Dorsey.

March 27: After privately informing them of his growing stake in the company, Musk starts conversations with Twitter’s CEO and board members about potentially joining the board. Musk also mentions taking Twitter private or starting a competitor, according to later regulatory filings.

April 4: A regulatory filing reveals that Musk has rapidly become the largest shareholder of Twitter after acquiring a 9% stake, or 73.5 million shares, worth about $3 billion.

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April 5: Musk is offered a seat on Twitter’s board on the condition he amass no more than 14.9% of the company’s stock. CEO Parag Agrawal said in a tweet that “it became clear to us that he would bring great value to our Board.”

April 11: Twitter CEO Parag Agrawal announces Musk will not be joining the board after all.

April 14: Twitter reveals in a securities filing that Musk has offered to buy the company outright for about $44 billion.

April 15: Twitter’s board unanimously adopts a “poison pill” defense in response to Musk’s proposed offer, attempting to thwart a hostile takeover.

April 21: Musk lines up $46.5 billion in financing to buy Twitter. Twitter board is under pressure to negotiate.

April 25: Musk reaches a deal to buy Twitter for $44 billion and take the company private. The outspoken billionaire has said he wanted to own and privatize Twitter because he thinks it’s not living up to its potential as a platform for free speech.

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April 29: Musk sells roughly $8.5 billion worth of shares in Tesla to help fund the purchase of Twitter, according to regulatory filings.

May 5: Musk strengthens his offer to buy Twitter with commitments of more than $7 billion from a diverse group of investors including Silicon Valley heavy hitters like Oracle co-founder Larry Ellison.

May 10: In a hint at how he would change Twitter, Musk says he’d reverse Twitter’s ban of former President Donald Trump following the Jan. 6, 2021 insurrection at the U.S. Capitol, calling the ban a “morally bad decision” and “foolish in the extreme.”

May 13: Musk said that his plan to buy Twitter is “ temporarily on hold.” Musk said that he needs to pinpoint the number of spam and fake accounts on the social media platform. Shares of Twitter tumble, while shares of Tesla rebound sharply.

June 6: Musk threatens to end his $44 billion agreement to buy Twitter, accusing the company of refusing to give him information about its spam bot accounts.