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Ameren Corporation Nuclear Decommissioning Trust
Ameren Corporation Nuclear Decommissioning Trust holds $1.3 billion for Callaway Energy Center retirement under NRC and MPSC rules.
Ameren Corporation Nuclear Decommissioning Trust
Ameren Corporation was established in 1902 as the holding company for Union Electric and later Illinois utilities. The Nuclear Decommissioning Trust exists as a legally separate vehicle whose assets cannot be used for any purpose other than Callaway plant retirement and ISFSI closure. The trust allocates across public equities, US Treasury and agency securities, and energy derivatives. Confirmed holdings include representative S&P 500 positions valued at $884 million and fixed-income securities at $403 million. Geographic exposure centers on the United States with direct real-asset interests in Callaway County, Missouri, including the planned 250-megawatt Reform Renewable Energy Center. Ameren Missouri owns 100 percent of Union Electric Company and 60 percent of Electric Energy Inc. The firm employs Willis Towers Watson as investment advisor and PricewaterhouseCoopers as auditor. TLG Services provides decommissioning cost studies under a 2023 engagement. The trust maintains a single-purpose mandate tied directly to Ameren Missouri rate-base recovery and NRC license conditions, creating a regulatory rather than discretionary investment structure.
General information
Firm type
Trust / Investment Trust
Year founded
1902
AUM
Undisclosed
Location
Region
North America
Country
United States
City
St. Louis
Corporate office
One Ameren Plaza 1901 Chouteau Avenue, St. Louis, MO, United States
Principals
Marty Lyons
Chairman, President, and CEO of Ameren Corporation
Mark Birk
Chairman and President of Ameren Missouri
Sector focus
Frequently asked questions
Who oversees investment decisions for the Ameren Nuclear Decommissioning Trust?
Marty Lyons as Chairman, President, and CEO of Ameren Corporation and Mark Birk as Chairman and President of Ameren Missouri provide oversight. BNY Mellon acts as trustee and Willis Towers Watson serves as investment advisor.
What asset classes does the trust hold?
The trust holds S&P 500 representative equities, US Treasury and agency securities, natural gas and financial power derivatives, and direct interests in Callaway County land.
How is the trust funded and regulated?
Funding occurs through Missouri rate recovery mechanisms. The Missouri Public Service Commission and Nuclear Regulatory Commission set contribution levels and investment guidelines.
Does the trust make private equity or venture investments?
No private equity or venture commitments appear in the disclosed holdings. Allocations remain in public equities, government securities, and energy derivatives.
What is the relationship between the trust and Ameren Missouri?
Ameren Missouri is the sponsor utility whose rates support the trust. The trust assets are ring-fenced and cannot be accessed by the parent holding company.
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