Twitter released mixed first-quarter results Thursday, with revenues missing estimates but active users rising, three days after agreeing to be acquired by Elon Musk.

The micro-blogging platform reported profits of $513.3 million, more than seven times the year-ago level following a one-time gain from a divestiture. Revenues rose 16 percent to $1.2 billion, a bit below the $1.22 billion expected by analysts.

Twitter's count of active users rose to 229 million, a bit above analyst expectations.

The results are expected to be among Twitter's final earnings reports following the Musk deal, which is anticipated to close in 2022. In the wake of the deal, Twitter canceled its quarterly earnings conference call with analysts.

Twitter reported mixed results in what is expected to be one of its final earnings reports before it is taken private by Elon Musk
Twitter reported mixed results in what is expected to be one of its final earnings reports before it is taken private by Elon Musk AFP / Olivier DOULIERY

On Monday, Tesla Chief Executive Musk announced an agreement to acquire Twitter for $44 billion at $54.20 per share in cash.

Twitter had initially resisted Musk's efforts, but abruptly shifted course after the brash entrepreneur lined up billions of dollars in financing from large banks to supplement the contribution from his personal fortune.

On Thursday, Musk attacked Twitter legal counsel Vijaya Gadde, who has led efforts to battle bullying, drawing criticism from women's groups, Twitter's former CEO and others.

Shares of Twitter rose 0.9 percent to $49.10 in pre-market trading.

But that is below the price in the transaction and also under the $51.70 level Monday following the deal.