Cardio Diagnostics Holdings Inc. Common stock. Replay the stock market charts of CDIO day by day, back to 2003. Open long and short positions without spending any money. Cardio Diagnostics Holdings, Inc. develops and commercializes epigenetics-based clinical tests for cardiovascular disease. It offers Epi+Gen CHD, a three-year symptomatic coronary heart disease risk assessment test. Cardio Diagnostics Holdings, Inc. was founded in 2017 and is based in Chicago, Illinois.