Warner L. Baxter

Companies

• WEC Energy GroupBoard member Jan 2, 2025 to now¹
• Quanta ServicesBoard member May 29, 2024 to now²
• U.S. BancorpBoard member Dec 11, 2015 to now³
• AmerenChair Feb 13, 2015 to Mar 2, 2023⁴
• AmerenPresident Mar 12, 2014 to Dec 16, 2021⁵
• AmerenChief executive officer Feb 18, 2010 to Dec 16, 2021⁶
• UMB Financial CorporationBoard member May 2, 2013 to Feb 3, 2015⁷
• AmerenChief financial officer Feb 14, 2006 to Feb 10, 2010⁸

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• Ameren AEE231,405 shares⁹$24.6M at $106.48Mar 2, 2023
• Quanta Services PWR1,181 shares¹⁰$711.0K at $602.04Jun 1, 2026
• WEWEC Energy Group WEC3,353 shares¹¹$364.9K at $108.84Jan 2, 2026
• UMB Financial Corporation UMBF1,329 shares¹²$172.3K at $129.66Jan 30, 2015

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 1, 2026Exercised options 559 shares of Quanta Services¹⁰
• Jan 2, 2026Granted 1,603 shares of WEC Energy Group¹¹
• Jun 1, 2025Exercised options 622 shares of Quanta Services¹³
• Jan 2, 2025Granted 1,693 shares of WEC Energy Group¹⁴
• Mar 2, 2023Sold 16,077 shares at $82.35 of Ameren⁹
• Mar 2, 2023Sold 16,949 shares at $81.92 of Ameren⁹
• Mar 2, 2023Sold 16,793 shares at $81.25 of Ameren⁹
• Feb 28, 2023Shares withheld for tax 52,832 shares at $82.71 of Ameren⁹
• Feb 9, 2023Granted 96,823 shares of Ameren¹⁵
• Dec 14, 2022Gift 5,500 shares of Ameren¹⁶
• Dec 14, 2022Sold 50,000 shares at $90.32 of Ameren¹⁶
• Aug 9, 2022Sold 25,722 shares at $93.44 of Ameren¹⁷
• Aug 9, 2022Sold 28,278 shares at $92.97 of Ameren¹⁷
• Mar 8, 2022Gift 5,555 shares of Ameren¹⁸
• Mar 8, 2022Sold 21,789 shares at $88.10 of Ameren¹⁸
• Mar 1, 2022Sold 8,945 shares at $85.83 of Ameren¹⁹
• Mar 1, 2022Sold 9,179 shares at $85.18 of Ameren¹⁹
• Mar 1, 2022Sold 9,221 shares at $84.63 of Ameren¹⁹
• Feb 28, 2022Shares withheld for tax 44,117 shares at $85.95 of Ameren¹⁹
• Feb 10, 2022Granted 10,270 shares of Ameren²⁰
• Feb 10, 2022Granted 75,962 shares of Ameren²⁰
• Dec 14, 2021Gift 11,300 shares of Ameren²¹
• Dec 14, 2021Sold 57,000 shares at $87.31 of Ameren²¹
• Jan 30, 2015Granted 824 shares at $48.52 of UMB Financial Corporation¹²
• Jan 31, 2014Granted 505 shares of UMB Financial Corporation²²