Jackson, Michigan-based CMS Energy Corporation (CMS) is a diversified energy company that primarily provides electric and natural gas utility services. Valued at a market cap of $21 billion, the company also operates non-utility businesses, which encompass independent power generation and renewable energy development efforts. Companies worth$10 billion or more are typically classified as “large-cap stocks,” and CMS fits the label perfectly, with its market cap exceeding this threshold, underscoring its s ...