Lynsi Lavelle Snyder-Ellingson (previously Seawell, Martinez, and Torres; born May 5, 1982) is an American billionaire businesswoman, the owner and heiress of the In-N-Out Burger company. She is the only child of Lynda and H. Guy Snyder and the only grandchild of Harry and Esther Snyder, who founded In-N-Out in 1948. According to the Bloomberg Billionaires Index, in 2012, Snyder was the youngest American female billionaire. As the sole beneficiary of family trusts, she received control of the company's stock in its entirety on her 35th birthday, becoming the sole owner.