Companies should ensure sustainability in their business and marketing strategies. The objective of the study is to conduct an analysis of the marketing strategies and actions of companies and the marketing systems which aim to ensure sustainable marketing. The methodology adopted is a conceptual analysis of various marketing actions of companies and of sustainable marketing practices. Companies adopt sustainable marketing strategies viz. consumer-oriented marketing, customer value marketing, innovative marketing, sense-of-mission marketing, and societal marketing. They adopt initiatives to ensure sustainable marketing and sustainability. Academicians may analyze various aspects of sustainable marketing and suggest the best practices. Practicing managers may analyze the various strategies and initiatives adopted by companies and suggest the best and the most effective practices for their own organizations to ensure sustainability in their business and marketing actions and to achieve business excellence in the long run.