Musk said he would “abide by the results of this poll, whichever way it goes.”
As of Sunday afternoon, 57.9 percent of the 3.5 million participants said he should sell. The poll ended at 3 p.m. EST.
"I was prepared to accept either outcome," Musk said, after the voting ended.
The amount of stock in play is valued at about $21 billion, based on his holdings of 170.5 million Tesla shares. The stock, which surged 74 percent this year to a record on Thursday, closed 0.6 percent lower at $1,222.09 on Friday.
Including stock options, Musk owns a 23 percent stake in Tesla, the world's most valuable car company whose market value recently exceeded $1 trillion. He also owns other valuable companies including Space X.
The number of shares Musk could be set to offload based on the Twitter poll is equivalent to 80 percent of the average daily trading volume for Tesla in the past three months.
Musk, the world’s richest person known for his tongue-in-cheek tweets, cited recent discussion of the wealthy hoarding unrealized gains to avoid paying taxes.