Background: Workplace wellness programs (WWPs) are increasingly promoted by businesses and governments as an important strategy to improve workers’ overall health and well-being and to reduce health care and other organizational costs. Few studies have evaluated WWPs in small businesses to provide evidence on the potential return-on-investment (ROI) that WWPs might yield. This study aimed to fill this gap by presenting a quasi-experimental, ROI analysis of a WWP in a small company. Methods: This observational quasi-experimental study evaluated economic outcomes of a multicomponent WWP implemented by a small long-term care company. The company provided approximately 2 years of de-identified, individualized data on its employees for 2013–2015...