Stripes Group invested $90 million for an undisclosed minority stake in Siete Family Foods. : Investors often compare vetting a founder to dating, and completing a deal to getting married. But Stripes Group’s latest investment is more akin to marrying into a tight-knit family. The private equity firm recently invested $90 million in Siete Family Foods, the grain-free tortilla and chip maker based in Austin that is run by nine members of the Garza family. In this case, Siete wasn’t looking for capital, but 31-year-old CEO Miguel Garza says the family was struck by Stripes Group’s understanding of their vision.