---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-24-073784"
form_type: "8-K"
ticker: "AEE"
cik: "0001002910"
company_name: "AMEREN CORP"
filed_at: "2024-06-21T23:59:59+00:00"
generated_at: "2026-06-01T02:40:40.115973+00:00"
event_type: "regulatory"
sentiment: "neutral"
materiality_score: 0.55
calibrated_materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# ICC approves revised rate plan for Ameren Illinois; $285M cumulative increase through 2027

## Summary
- ICC Rehearing Order approves $1,196M (2024) to $1,397M (2027) annual electric revenue requirements.
- Cumulative 4-year increase of $285M, down from $305M requested in April 2024 rehearing.
- Rate base approved at $4.0B (2024) to $4.7B (2027); removal of $12M OPEB and $7M projects from rate base.
- New rates effective June 27, 2024; ICC decision on revised Grid Plan expected by December 2024.
- Appeal of prior ICC order remains pending before Illinois Appellate Court; further rehearing possible.

## SEC filing metadata
- accession: 0001104659-24-073784
- form_type: 8-K
- ticker: AEE
- cik: 0001002910
- company_name: AMEREN CORP
- filed_at: 2024-06-21T23:59:59+00:00
- event_type: regulatory
- sentiment: neutral
- materiality_score: 0.55
- calibrated_materiality_score: 0.55
- confidence: high
- sec_items: 8.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1002910/000110465924073784/0001104659-24-073784-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/18654/000110465924073784/tm2417728d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-24-073784
- JSON: https://secwatch.observer/filing/0001104659-24-073784.json
- Plain text: https://secwatch.observer/filing/0001104659-24-073784.txt

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