Lynsi Snyder, the mysterious heiress to the In-N-Out Burger fortune, turned 35 years old Friday—which means she's now a billionaire. Per the trust put in place by her grandparents, the founders of the California-based chain, Snyder has been receiving stakes in the company for the past 10 years; as of her 35th birthday, she received the last portion, meaning she now owns 97% of the company and is worth an estimated $1.3 billion, Forbes reports.
Snyder's grandfather died in 1976, Business Insider reports; her uncle then took over until he died in 1993. Snyder's father took over after that, but he died in 1999, at which point Snyder started getting more involved. She became president in 2010, four years after her grandmother died. She has made few changes to the company's simple burger-and-fries formula, though she did expand the chain from four states to six; its revenue has risen 57% to an estimated $870 million since she took over. (Read more Lynsi Torres stories.)