Music City billionaire’s club is a small group — but it’s about to nearly double, with three new members. SmileDirectClub’s upcoming initial public offering is set to make the company’s two 30-year-old co-founders and its CEO Nashville’s newest billionaires. Co-founders Jordan Katzman and Alex Fenkell’s stakes in SmileDirectClub stand to be valued at nearly $1.5 billion each once the company goes public, according to filings. CEO David Katzman, Jordan’s father, will own nearly $2 billion worth of the company.