IL · United States1.4M+ registered entities3,800 SEC-listed companies
Illinois Companies — SEC EDGAR Data
Illinois — anchored by Chicago — is a major financial, manufacturing, and logistics hub. Home to Boeing (relocated HQ), Caterpillar, Abbott Laboratories, Archer-Daniels-Midland, and the Chicago Mercantile Exchange. The Midwest's dominant corporate center.
Incorporation note — Major Midwest corporate hub. Chicago is a top-3 financial center.
Search Illinois companiesRegistered entities
1.4M+
SEC-listed companies
3,800+
Primary registry
SEC EDGAR
State registry
Illinois Secretary of
Notable Illinois Companies
BoeingCaterpillarAbbott LaboratoriesArcher-Daniels-MidlandWalgreens
What SEC data is available for Illinois companies?
✓Company name & CIK number
✓State of incorporation
✓SIC industry code
✓Fiscal year end date
✓Ticker symbol (if listed)
✓10-K annual report filings
✓10-Q quarterly financials
✓8-K material event filings
✓XBRL structured financial data
✓Revenue & net income history
✓Institutional holdings (13F)
✓Insider ownership & transactions
Illinois Company Registry
State registry: Illinois Secretary of State
Federal registry: SEC EDGAR — all publicly listed companies file 10-K, 10-Q, 8-K, and proxy statements regardless of state of incorporation.