The provided text is an excerpt from a Wikipedia article focusing on Constellation Energy, an American energy company based in Baltimore, Maryland. It gives a detailed corporate history, tracing the company's evolution from its founding in 1999, through its merger with Exelon in 2012, and its subsequent spin-off as an independent entity in 2022. The source extensively outlines Constellation Energy's diverse operations and power generation portfolio, which includes electric power, natural gas, and substantial assets in nuclear, fossil, hydro, solar, and wind energy. Furthermore, the article provides key financial data, employee statistics, and notes the company's community involvement through historical archives and philanthropy in the Baltimore area.