Twitter's board has recommended unanimously that shareholders approve  the proposed $44 billion sale of the company to billionaire and Tesla  CEO Elon Musk

Elon Musk reiterated his desire to move forward with the acquisition last week during a virtual meeting with Twitter employees

though shares of Twitter remain far below his offering price, signaling considerable doubt that it will happen.

On Tuesday at the Qatar Economic Forum in an interview with Bloomberg,  Musk listed the approval of the deal by shareholders as one of several  “unresolved matters" related to the Twitter deal.

Shares of Twitter Inc. were essentially flat just before the opening  bell Tuesday and far short of the $54.20 per-share that Musk has offered  to pay for each.

The company's stock last reached that level on April 5 when it offered  Musk a seat on the board before he had offered to buy all of Twitter.

In a filing with the U.S. Securities and Exchange Commission detailing  on Tuesday detailing a litter to investors, Twitter's board of directors  said that it “unanimously recommends that you vote (for) the adoption  of the merger agreement."

If the deal were to close now, investors in the company would pocket a profit of $15.22 for each share they own.