Madison, Wisconsin-based Alliant Energy Corporation (LNT) operates as a utility holding company, providing regulated electricity and natural gas services. Valued at $16.5 billion by market cap, Alliant serves nearly 1 million electric and 425,000 natural gas retail customers across Iowa and Wisconsin. Companies worth $10 billion or more are generally described as "large-cap stocks." LNT fits right into that category, with its market cap exceeding this threshold, reflecting its notable size and influence i ...