Energy companies in Illinois
3 energy companies are indexed in Illinois. Each entry below is built from public sources and links to its filings and identifiers. This is a factual directory, not a ranking.
| Company | Industry | Type | Ticker | Revenue (dated) |
|---|---|---|---|---|
| Exelon | Energy | public | EXC | $24B (FY 2025) |
| Amoco | Energy | private | — | — |
| Invenergy | Energy | private | — | — |
See all Illinois companies or allenergy companies.