Gwendolyn G. Mizell

Sits on 1 board. Last updated September 28, 2026

Time on boards

Boards served
1
Current seats
1
Board service
3 years
Director since
2023

3 years of board service in total across 1 board, counting each seat separately. Longest: Gibraltar Industries Inc., 3 years.

3 years ยท Since 2023

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Date Company Transaction Shares Price Value
Sep 3, 2025 Ameren Corporation Open-market sale โˆ’1,500 $99.50 $149,250
Aug 22, 2025 Ameren Corporation Open-market sale โˆ’1,000 $101.79 $101,790
May 12, 2025 Ameren Corporation Shares withheld for tax โˆ’1,126 $97.40 $109,672
Apr 30, 2025 Gibraltar Industries Inc. Grant or award +2,172 $52.95 $115,007
Feb 28, 2025 Ameren Corporation Shares withheld for tax โˆ’796 $101.56 $80,842
Feb 6, 2025 Ameren Corporation Grant or award +927 โ€” โ€”
Feb 6, 2025 Ameren Corporation Grant or award +1,920 โ€” โ€”
Dec 11, 2024 Ameren Corporation Gift โˆ’1,469 โ€” โ€”
May 1, 2024 Gibraltar Industries Inc. Grant or award +1,670 $68.86 $114,996
Feb 29, 2024 Ameren Corporation Shares withheld for tax โˆ’363 $71.19 $25,842
Feb 8, 2024 Ameren Corporation Grant or award +1,132 โ€” โ€”
Feb 8, 2024 Ameren Corporation Grant or award +790 โ€” โ€”
May 3, 2023 Gibraltar Industries Inc. Grant or award +2,117 $54.33 $115,017

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