Tesla Inc CEO Elon Musk has said that he would heed shareholder concerns and no longer pursue a $72 billion deal to take his US electric car maker private, abandoning an idea that had stunned investors and drawn regulatory scrutiny.

The decision leaves Tesla as a publicly listed company but raises new questions about its future.

Its shares have been trading below their 7 August levels, when Mr Musk announced on Twitter he was considering taking Tesla private for $420 per share, as investors wondered what the long-shot bid meant for Mr Musk's ability to steer the company to profitability.

The move also leaves Mr Musk and Tesla having to fend off a series of investor lawsuits and a US Securities and Exchange Commission investigation into the factual accuracy of Mr Musk's tweet that funding for the deal was "secured".

Mr Musk said yesterday that his belief that there is more than enough funding to take the company private was reinforced during the process.

He attributed his decision to abandon the bid to feedback he received from shareholders and on the effort proving to be more time-consuming and distracting than he anticipated.

"Although the majority of shareholders I spoke to said they would remain with Tesla if we went private, the sentiment, in a nutshell, was 'please don’t do this'," Mr Musk wrote in a blog post yesterday.

Mr Musk, who owns about a fifth of Tesla, had said earlier this month that he envisioned taking the company private without using the standard method of a leveraged buyout, whereby all the other shareholders would cash out and the deal would be funded primarily with new debt.

Instead, two-thirds of company shareholders, according to his estimate, would have chosen an option of "rolling" their stakes and continuing to be investors in a private company, rather than cashing out.

This would significantly reduce the amount of money needed for the deal and avoid further burdening Tesla, which has a debt pile of $11 billion and negative cash flow.

However, Mr Musk said yesterday that a number of institutional shareholders explained to him that they have internal compliance issues that limit how much they can invest in a private company.

He added that there is no proven path for most retail investors to own shares were Tesla to go private.

Mr Musk had previously said that Saudi Arabias PIF, which became a Tesla shareholder earlier this year with a stake of just under 5%, could help him fund the cash portion of the deal, though sources close to the sovereign wealth fund had played down that prospect.

PIF is in talks to invest more than $1 billion in aspiring Tesla rival Lucid Motors Inc, Reuters reported last Sunday.

Six members of Tesla's board of directors said in a separate statement that they were informed on Thursday that Mr Musk was abandoning his take-private bid.

The board then disbanded a special committee of three directors it had set up to evaluate any offer that Mr Musk submitted.

"We fully support Elon as he continues to lead the company moving forward," said the board statement.