ENIn the modern day, businesses face many challenges: from economic recessions to political and social trends, no wonder, that the modern enterprise should not just be aiming at earning profits but also at complying with the social norms and trends of the modern world. Sustainability is a vast term that describes many different things, therefore it is important for businesses to clearly define it, know what the examples of it are and which practices to use to stay sustainable. This article aims to provide theoretical basis for sustainability in businesses and evaluate the level of sustainability of some enterprises in Europe and to provide the theoretical basis for sustainability in business and conduct the analysis of levels of sustainability of four enterprises based in Lithuania and Ukraine. Keywords: business, sustainability.