GEN Restaurant Group Inc. Class A Common Stock. Replay the stock market charts of GENK day by day, back to 2003. Open long and short positions without spending any money. GEN Restaurant Group, Inc. operates restaurants in California, Arizona, Hawaii, Nevada, New York, and Texas. Its restaurants specialize in various flavored meats for Korean barbeque. The company was founded in 2011 and is based in Cerritos, California.