AILLO Ameren Illinois Co
OTC marketsActive
AILLO is the ticker symbol of Ameren Illinois Co, which is quoted on OTC markets.
AILLO at a glance
- Symbol
- AILLO
- 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.
AILLO 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 AILLO?
AILLO is the ticker symbol of Ameren Illinois Co on OTC markets.
Is AILLO still trading?
Yes. AILLO appears in the SEC company ticker list as of Sep 2026.
Which exchange is AILLO listed on?
AILLO is quoted on OTC markets.
Nearby symbols
AILIN Ameren Illinois CoAILIO Ameren Illinois CoAILIP Ameren Illinois CoAILLI Ameren Illinois CoAILLM Ameren Illinois CoAILLN Ameren Illinois CoAILLP Ameren Illinois CoAIM AIM ImmunoTech Inc.AIMC Altra Industrial Motion Corp.AIMD Ainos, Inc.AIN Albany International CorporationAINV Apollo Investment Corporation