Elon Musk has launched a hostile takeover bid of Twitter.
According to multiple reports Musk has made an offer of $54.20 per share, which gives the social media company an overall valuation of $43 billion.
More here
UPDATE:
Musk tweeted a link to his filings with the SEC in relation to the offer. Included is the text of an exchange between him and Twitter as well as the letter referenced at the link above: