Duff & Phelps Trims Ameren Holdings

Investment firm reduces stake in utility company by 10.4% in Q3

Published on Mar. 12, 2026

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Duff & Phelps Investment Management Co. reduced its holdings in Ameren Corporation (NYSE:AEE) by 10.4% during the third quarter, according to a recent 13F filing with the SEC. The institutional investor now owns 1,252,421 shares of the utilities provider's stock, making it Ameren's 19th largest shareholder.

Why it matters

Ameren is a major electric and natural gas utility serving customers in Missouri and Illinois. Changes in institutional ownership can signal shifts in market sentiment around the company's performance and outlook.

The details

Duff & Phelps sold 144,823 Ameren shares in Q3, reducing its total stake to approximately 1.5% of the company's outstanding shares. The investment firm cited unspecified portfolio management reasons for the reduction in its Ameren holdings.

  • Duff & Phelps filed its 13F report for the third quarter on 2026-03-12.

The players

Duff & Phelps Investment Management Co.

An institutional investment management firm that owns a 1.5% stake in Ameren Corporation.

Ameren Corporation

An integrated energy company that provides electric and natural gas delivery services in Missouri and Illinois.

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The takeaway

This filing indicates that one of Ameren's larger institutional investors has reduced its position in the utility, though the reasons behind the move are not entirely clear. Investors will likely monitor Ameren's performance and any further changes in institutional ownership going forward.