John Michael Custer

Sits on 1 board. Last updated September 28, 2026

Time on boards

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

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

Watsco Inc. Director
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
Jun 10, 2025 Watsco Inc. Open-market sale โˆ’2,200 $448.27 $986,194
Jun 6, 2024 Watsco Inc. Option exercise +1,666 $260.28 $433,626
Jun 6, 2023 Watsco Inc. Option exercise +1,667 $260.28 $433,887
Jun 6, 2023 Watsco Inc. Shares withheld for tax โˆ’1,257 $345.02 $433,690
Feb 27, 2023 Watsco Inc. Option exercise +5,000 $160.69 $803,450
Feb 27, 2023 Watsco Inc. Shares withheld for tax โˆ’2,634 $304.99 $803,344
Feb 27, 2023 Watsco Inc. Option exercise +2,500 $175.07 $437,675
Feb 27, 2023 Watsco Inc. Shares withheld for tax โˆ’1,435 $304.99 $437,661
Feb 27, 2023 Watsco Inc. Option exercise +1,667 $260.28 $433,887
Feb 27, 2023 Watsco Inc. Shares withheld for tax โˆ’1,422 $304.99 $433,696

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