Customer experience (CX) is an important contributor to business performance. Yet, studies vary in defining CX, variables and constructs, and measurement to performance. This study defined CX and the direct impact to market capitalization (MC) of US public companies. The CX definition combined Customer Experience Quality (CEQ) with Customer Satisfaction (CSAT), Customer Loyalty (CLY), and Net Promoter Score (NPS). Each dimension was measured to the extent to which they impact MC. The sample consisted of 1605 US customers of US publicly traded companies. Using correlation analysis, multiple linear regression, and confirmatory factor analysis, the individual variables of CEQ were positively and significantly correlated with MC and with each other. CEQ, CSAT, CLY, and NPS were also positively and significantly correlated with MC, and the holistic CX was predictive of MC. Companies can apply the insights of the study to improve their customer experience to deliver measurable business and shareholder value.