Ameren Illinois Company

Overview

Deal Type Debt Capital Markets
Size $400 Million
First Mortgage Bonds
Our Role Active Joint Bookrunner

Summary

In August 2026, KeyBanc Capital Markets acted as Active Joint Bookrunner for Ameren Illinois Company’s (AIC) $400 million First Mortgage Bond offering. The bonds were issued at a spread of T+78 with a 5.5% coupon and mature in 2036.

AIC intends to use the proceeds for general corporate purposes, including the repayment of outstanding short-term debt.

About Ameren Illinois Company
Ameren Illinois Company is a subsidiary of Ameren Corporation, a public utility holding company. AIC is headquartered in Collinsville, Illinois, and operates in the rate-regulated electric generation, transmission, and distribution business, as well as the natural gas distribution business. The company provides electricity to approximately 1.2 million customers across more than 1,200 communities, with a service territory spanning 43,700 square miles.

KeyBanc Capital Markets is a trade name under which the corporate and investment banking products and services of KeyCorp and its subsidiaries, KeyBanc Capital Markets Inc., Member FINRA/SIPC (“KBCMI”), and KeyBank National Association (“KeyBank N.A.”), are marketed. Securities products and services are offered by KeyBanc Capital Markets Inc. and its licensed securities representatives. Banking products and services are offered by KeyBank N.A.

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