The 2026 IRP signals a multi-decade capital investment cycle for Ameren Missouri, but as a non-binding plan it carries no immediate financial commitment. Monitor future rate cases and certificate of convenience and necessity (CCN) filings for specific project approvals and cost recovery mechanisms.
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Executive Summary
Ameren Missouri filed its non-binding 2026 Integrated Resource Plan (IRP) with the Missouri Public Service Commission, outlining a preferred plan for meeting long-term energy demand through 2045. The plan forecasts significant load growth (2.9-3.9 GW by 2030, 6-9 GW by 2045) and calls for major investments in natural gas, solar, wind, battery storage, and new nuclear generation, while retiring coal and some existing gas plants. This is a long-term strategic roadmap with no immediate financial impact.
Key Facts
- Ameren Missouri filed its non-binding 2026 IRP with the MoPSC on September 28, 2026.
- Forecasted energy demand growth ranges from ~2.9-3.9 GW by 2030, 5-6 GW by 2035, and 6-9 GW by 2045.
- Preferred plan includes 2,100 MW combined-cycle gas by 2031, 1,900 MW simple-cycle gas by 2029, 1,300 MW solar by 2030, 1,500 MW wind by 2040, 2,400 MW battery storage by 2030, and 1,200 MW new nuclear by 2040.
- Plan extends retirement of two Labadie coal units from 2036 to 2042 and retires ~1,800 MW of gas-fired capacity by 2040.
- Ameren Missouri expects to seek NRC approval to extend the Callaway nuclear plant's operating license beyond 2044.
Financial Impact
No dollar amounts or financial projections are provided in the filing. The IRP is a non-binding planning document; capital expenditure estimates are not disclosed.
Risk Factors
- Regulatory approval risk for individual projects (CCNs, permits, rate recovery).
- Execution risk on large-scale construction timelines and cost overruns.
- Demand growth assumptions may not materialize if data center or large-load customer additions fall short.
Investment Themes
Documents Analyzed
This report is based on 4 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 8-K Filing (Primary) | 0001104659-26-111420 |
| Document: 0001104659-26-111420-index-headers.html | 0001104659-26-111420 |
| Document: 0001104659-26-111420-index.html | 0001104659-26-111420 |
| Document: 0001104659-26-111420.txt | 0001104659-26-111420 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 21, 2026 5d ago | Institutional Cluster | $108.94 | awaiting T+60 | — | $108.08 (−0.79%) |
Oct 14, 2026 12d ago | Press Release | $103.76 | awaiting T+60 | — | $108.08 (+4.16%) |
Sep 28, 2026 28d ago | 8-K | $100.25 | awaiting T+60 | — | $108.08 (+7.81%) |
Sep 18, 2026 5w ago | 8-K | $102.23 | awaiting T+60 | — | $108.08 (+5.72%) |
Aug 24, 2026 9w ago | 8-K | $107.16 | awaiting T+60 | — | $108.08 (+0.86%) |
Aug 17, 2026 10w ago | Press Release | $109.67 | awaiting T+60 | — | $108.08 (−1.45%) |
Aug 14, 2026 10w ago | Press Release | $109.74 | awaiting T+60 | — | $108.08 (−1.51%) |
Aug 4, 2026 11w ago | 424B5 | $108.95 | awaiting T+60 | — | $108.08 (+0.80%) |
Aug 4, 2026 11w ago | S-3ASR | $109.44 | awaiting T+60 | — | $108.08 (−1.24%) |
Aug 3, 2026 12w ago | Institutional Cluster | $109.44 | awaiting T+60 | — | $108.08 (−1.24%) |
US Market Status
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