Ameren Corporation (AEE) closed at $101.64 on September 23, 2026, slipping 0.19% over the prior 24 hours. The modest single-session decline added to a pattern of softness that has characterized the utility stock's recent trading activity.
Over the past seven days, AEE fell 1.36%, while the 30-day window shows a steeper retreat of 4.22%. The cumulative pressure over that longer stretch reflects sustained selling in the shares of the St. Louis-based electric and gas utility.
Ameren's market capitalization stood at $28.19 billion as of the close. The stock's performance over recent weeks places it in negative territory across all three measured time horizons, from the daily reading through the monthly view.
The 30-day decline of 4.22% represents the most significant move among the tracked periods, suggesting the recent weakness began building well before the latest session's small dip.
