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AI brief of an SEC Form 8-K · Ameren (AEE)

Ameren: Chairman and President of Ameren Missouri Mark Birk to retire; CFO Moehn named interim

Neutral Impact 4 of 5 leadership Written later

Mark C. Birk informed Ameren that he will retire as Chairman and President of Union Electric Company (Ameren Missouri), effective October 2, 2025, and from his other subsidiary roles. Senior Executive Vice President and CFO Michael L. Moehn was elected Interim Chairman and President of Ameren Missouri, a role he previously held from 2014 to 2019. The filing does not describe a permanent successor or any financial effect.

Key points

  • Mark C. Birk to retire as Chairman and President of Ameren Missouri, effective October 2, 2025
  • Michael L. Moehn, Ameren's CFO since 2019, named Interim Chairman and President of Ameren Missouri
  • Moehn previously served as Chairman and President of Ameren Missouri from 2014 to 2019

The filing

CompanyAmeren (AEE)
Form8-K, current report
Filed with the SECOct 3, 2025, 4:47 PM ET
Accession number0001104659-25-096700

Items reported: 5.02 Director / Officer Change

Read the filing on SEC.gov ↗

Written by AI on Nov 8, 2026, 1:10 AM ET, from this filing only. Written later: this filing was briefed after the fact, when past filings were added to the site, so the brief may be read with hindsight; the filing itself is the record of what was known on October 03, 2025.

Briefs are written by AI from the filing text and can contain mistakes — open the filing before acting on anything. Impact (1-5) and tone are the AI's reading of the filing for shareholders, not a price forecast. Not investment advice.