Ameren To Acquire Illinois Utilities


Substation Relay Protection Training

Our customized live online or in‑person group training can be delivered to your staff at your location.

  • Live Online
  • 12 hours Instructor-led
  • Group Training Available
Regular Price:
$699
Coupon Price:
$599
Reserve Your Seat Today
Ameren Corp. has cleared the final hurdle in its quest to acquire CILCORP and Central Illinois Light Co. from AES Corp.

Ameren announced that the Securities and Exchange Commission approved the acquisition, the last regulatory approval needed before the sale can be closed.

How soon the actual closing will occur is not set, said Ameren spokeswoman Susan Gallagher. She said only that Ameren still expects it to occur early in the first quarter. She declined to speculate whether it could be a matter of days or weeks.

Gallagher said some document work still must be completed between St. Louis-based Ameren and AES, the Arlington, Va.-based company that has owned CILCORP for just over three years.

Once that work is completed, the closing would occur soon thereafter, she said.

Ameren's offer of US$1.4 billion, much of which is debt assumption, was accepted by AES last April. But closing was subjected to regulatory approval of many state and federal agencies, including the Illinois Commerce Commission, the Federal Energy Regulatory Commission, the US Department of Justice and the SEC.

The SEC approval was the last needed.

Once the sale is completed, CILCO will become known as AmerenCILCO. The CILCO headquarters will remain in Peoria, at least until 2005, as Ameren promised local officials at the same time it promised to retain at least 800 of CILCO's current 900 employees.

The acquisition will make Ameren the second-largest electric company in Illinois with more than 2 million customers, behind only Commonwealth Edison in Chicago.

Related News

OPINION Rewiring Indian electricity

India Power Sector Crisis: a tangled market of underused plants, coal shortages, cross-subsidies, high transmission…
View more

Hydro-Québec to Invest $750 Million in Carillon Generating Station

Hydro-Québec Carillon Refurbishment delivers a $750M hydropower modernization, replacing six turbines and upgrading civil works,…
View more

Report call for major changes to operation of Nova Scotia's power grid

Nova Scotia Energy Modernization Act proposes an independent system operator, focused energy regulation, coal phase-out…
View more

Parisians vote to ban rental e-scooters from French capital by huge margin

Paris E-Scooter Ban: Voters back ending rental scooters after a public consultation, citing road safety,…
View more

Hydro One stock has too much political risk to recommend, Industrial Alliance says

Hydro One Avista merger faces regulatory scrutiny in Washington, Oregon, and Idaho, as political risk…
View more

Building begins on facility linking Canada hydropower to NYC

Champlain Hudson Power Express Converter Station brings Canadian hydropower via HVDC to Queens, converting 1,250…
View more

Sign Up for Electricity Forum’s Newsletter

Stay informed with our FREE Newsletter — get the latest news, breakthrough technologies, and expert insights, delivered straight to your inbox.

Electricity Today T&D Magazine Subscribe for FREE

Stay informed with the latest T&D policies and technologies.
  • Timely insights from industry experts
  • Practical solutions T&D engineers
  • Free access to every issue

Download the 2026 Electrical Training Catalog

Explore 50+ live, expert-led electrical training courses –

  • Interactive
  • Flexible
  • CEU-cerified