CMS Energy Corporation is a publicly traded energy company primarily focused on electric and natural gas utility operations. It is headquartered in Jackson, Michigan, and serves millions of customers across the state. The company operates through its principal subsidiary, Consumers Energy, which is one of the largest utility providers in Michigan.

In terms of sustainability, CMS Energy is committed to reducing its environmental impact and has set ambitious goals to achieve net-zero carbon emissions by 2040. The company has been investing in renewable energy sources, including wind and solar power, to transition away from fossil fuels. CMS Energy has also been recognized for its efforts in energy efficiency and conservation, helping customers reduce their energy consumption through various programs and initiatives.

CMS Energy publishes an annual Environmental, Social, and Governance (ESG) report, detailing its progress and strategies in sustainability. The company has received several accolades for its sustainability efforts, including being listed on the Dow Jones Sustainability Index for North America. However, specific carbon footprint calculations and detailed sustainability certifications are not extensively available in public domains.