Ameren

At a glance

Ameren reported 2025 revenue of $8.8B, up 15.4% from $7.62B in 2024. Over 4 years since 2021 ($6.39B), that is growth of about 8.3% a year. Operating margin was 23%, up from 20.8% in 2021. 2025 was the highest revenue year in this period.

In the last 12 months 11 insiders reported 0 open-market purchases and 21 sales ($8.7M). 11 of the sales were made under pre-arranged 10b5-1 plans. The largest was a sale of $3M by Chairman, President & CEO Martin J Lyons on Mar 3, 2026.

Ameren filed 17 current reports (Form 8-K) in the last 12 months, most often for other events (9), results of operations (4), officer or director change (2) and shareholder vote results (1). The latest officer or director change was reported on Feb 9, 2026. It reported a material agreement or a completed acquisition or disposal 1 time.

3 of the 20 investors tracked here held Ameren at the last quarter end, worth $110.1M combined. It is the largest weight for Renaissance Technologies (0.1% of its portfolio), followed by Bridgewater Associates (0.1%). Added: Renaissance Technologies and Bridgewater Associates.

Annual results

Fiscal year ends Dec 31 · incorporated in MO

Tracked investors holding (13F)

Weight is the share of each investor's portfolio, as of the quarter end.