Oct. 27 (UPI) -- Tesla's board chair says CEO Elon Musk may not stay if shareholders don't vote yes on Musk's nearly $1 trillion payout.

The shareholder vote for Musk's benefits and other Tesla proposals closes before noon Nov. 5.

"Without Elon, Tesla could lose significant value, as our company may no longer be valued for what we aim to become," Robyn Denholm warned Monday.

Musk's net worth is more than $400 billion, according to Forbes. His compensation plan would add about $900 billion and 423 million additional shares, giving Musk roughly a 25% ownership stake.

His deal was unveiled last month. It would give Musk, the former White House DOGE adviser to U.S. President Donald Trump, greater voting power at Tesla.