AILIO Ameren Illinois Co
OTC marketsActive
AILIO is the ticker symbol of Ameren Illinois Co, which is quoted on OTC markets.
AILIO at a glance
- Symbol
- AILIO
- Company / issuer
- Ameren Illinois Co
- Exchange
- OTC markets
- Status
- Actively traded
Ameren Illinois Co company profile
- Industry (SIC)
- Electric & Other Services Combined
- Headquarters
- Collinsville, IL
- Incorporated in
- IL
- Fiscal year end
- December 31
- Latest annual report
- 10-K filed 2026-02-18
- Latest interim report
- 10-Q filed 2026-08-03
- SEC CIK
- 18654
Former company names
- Central Illinois Public Service Co (until 2010)
Source: SEC EDGAR filer data.
AILIO price chart
Interactive chart provided by TradingView (loads third-party scripts).
Other symbols for Ameren Illinois Co
Frequently asked questions
What company has the ticker symbol AILIO?
AILIO is the ticker symbol of Ameren Illinois Co on OTC markets.
Is AILIO still trading?
Yes. AILIO appears in the SEC company ticker list as of Sep 2026.
Which exchange is AILIO listed on?
AILIO is quoted on OTC markets.