Ameren – Energy & Capacity RFP

Published:February 22, 2026

The North American Energy Markets Association is posting this RFP on behalf of our member Ameren.

Ameren Missouri provides electric service to approximately 1.3 million electric customers and 135,000 natural gas customers across central and eastern Missouri. The company covers 60+ counties and 500+ communities, with a major focus on the greater St. Louis area, offering reliable energy services for over 100 years.


About the Process
Ameren Missouri has issued a 2026 MISO Capacity RFP to obtain a varying volume of seasonal Zonal Resource Credits (ZRCs) across Planning Years 2027/28 – 2030/31 (see Bid Forms for details.) Proposals will be evaluated based on criteria outlined in the attached 2026 MISO Capacity RFP Description. Ameren Missouri will consider only ZRC’s delivered to MISO Local Resource Zones 1-7, and will show some preference to ZRC’s delivered to Zone 5. Resources in external zones will not be accepted. Seasonal offers are strongly preferred, but offers for full Planning Years may be considered. If a selected counterparty has an existing Master Agreement with Ameren Missouri, the confirmation (final terms to be negotiated) will align with that Master Agreement. For selected counterparties with no existing Master Agreement, a long form confirmation will be negotiated.

Questions, Notice of Intent, and Bid Forms should be sent to the email address indicated in the RFP Description document, [email protected], in a timely manner consistent with the RFP Schedule listed below and on the RFP Description document.