---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-130545"
form_type: "8-K"
ticker: "AEE"
cik: "0001002910"
company_name: "AMEREN CORP"
filed_at: "2024-12-20T23:59:59+00:00"
generated_at: "2026-05-28T23:59:49.352011+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# ICC approves $309M cumulative rate increase for Ameren Illinois (2024-2027)

## Summary
- ICC Order approved $309M cumulative electric distribution revenue increase vs. $332M requested by Ameren Illinois.
- Annual revenue requirements: 2024=$1,206M, 2025=$1,287M, 2026=$1,367M, 2027=$1,422M.
- Allowed ROE remains 8.72% with 50% equity capital structure; ROE is under appeal.
- Ameren Illinois' appeal of the December 2023 ICC order on ROE is pending before Illinois Appellate Court.
- Rate changes effective late December 2024; further appeals possible.

## SEC filing metadata
- accession: 0001104659-24-130545
- form_type: 8-K
- ticker: AEE
- cik: 0001002910
- company_name: AMEREN CORP
- filed_at: 2024-12-20T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1002910/000110465924130545/0001104659-24-130545-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/18654/000110465924130545/tm2431686d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-130545
- JSON: https://secwatch.observer/filing/0001104659-24-130545.json
- Plain text: https://secwatch.observer/filing/0001104659-24-130545.txt

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