Jack Dorsey, like Elon Musk, could serve as CEO of two major companies.
He's currently the interim chief executive at Twitter, the $18 billion company he helped start, and the CEO of Square, the mobile payments service he founded after Twitter took off.
Musk is the CEO of both electric automaker Tesla Motors and private space firm SpaceX.
This chart compares the stock performance of Twitter (in blue) and Tesla (red) over the past year to date.
Like Twitter, Tesla is a publicly traded firm with a turbulent and highly scrutinized stock. Like Square, SpaceX is a private firm (though Square has tentative plans to file for an IPO) at the cusp of a fast-growing industry.
The committee searching for a permanent CEO for Twitter said it will only consider candidates who can make a "full-time commitment." That would discount Dorsey, who vowed to keep his post at Square. He has repeatedly dodged questions about whether he would, if asked, remain at Twitter's helm.
But on Friday, billionaire investor Chris Sacca -- a highly influential venture capitalist with a big stake in Twitter -- urged Dorsey to stay on as permanent CEO of both companies.
In a series of tweets, the venture capitalist cast his ideal lineup for Twitter's c-suite: Dorsey as CEO, President of Global Revenues Adam Bain as chief operating officer and co-founder Ev Williams as executive chairman of the board.