---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-26-078317"
form_type: "8-K"
ticker: "AEE"
cik: "0001002910"
company_name: "AMEREN CORP"
filed_at: "2026-06-26T21:00:22+00:00"
generated_at: "2026-06-26T21:03:08.384139+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# Ameren Missouri files $343M electric rate increase request with MoPSC

## Summary
- Electric rate request seeks $343M annual revenue increase, based on 10.25% ROE and $16.7B rate base.
- Request includes 52% common equity capital structure and test year ended March 31, 2026.
- Investments cited: transmission/distribution, existing generation, and 400 MW of new generation resources.
- MoPSC decision expected by May 2027 with new rates effective June 2027; outcome uncertain.

## SEC filing metadata
- accession: 0001104659-26-078317
- form_type: 8-K
- ticker: AEE
- cik: 0001002910
- company_name: AMEREN CORP
- filed_at: 2026-06-26T21:00:22+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1002910/000110465926078317/0001104659-26-078317-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/100826/000110465926078317/tm2619084d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-26-078317
- JSON: https://secwatch.observer/filing/0001104659-26-078317.json
- Plain text: https://secwatch.observer/filing/0001104659-26-078317.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.