"Stone Brewing will never sell out. Stone Brewing is sacrosanct," Koch told Fortune Magazine in 2015.

"We're not interested in participating in a cash grab. There are two ways of operating a business - commodity or artisan. We operate as an artisan. We make decisions based on our passions."

Founded in 1996 in San Marcos, California, Stone Brewing has grown from seven employees and an annual production of 800 barrels to 1,100 employees and 330,000 barrels in 2015. It is currently the ninth largest brewery by sales volumes in the United States.