X0306 4 2022-05-27 0 0000105016 WATSCO INC WSO; WSOB 0001220297 ALVAREZ CESAR L 2665 S. BAYSHORE DRIVE SUITE 901 MIAMI FL 33133 1 0 0 0 Common Stock 2022-05-27 4 M 0 4000 143.86 A 0 D Common Stock 2022-05-27 4 S 0 3100 253.0493 D 0 D Common Stock 2022-05-27 4 S 0 900 255.2878 D 0 D Stock Option (right to buy) 143.86 2022-05-27 4 M 0 4000 143.86 D 2022-06-05 Common Stock 4000 0 D Stock Option (right to buy) 185.12 2023-06-04 Common Stock 4000 4000 D Stock Option (right to buy) 160.69 2024-06-03 Common Stock 5000 5000 D Stock Option (right to buy) 175.07 2025-06-01 Common Stock 2500 2500 D The options vested June 5, 2019. The options vested June 4, 2020. The options vested June 3, 2021. The options vest 33 1/3% on June 1, 2020, June 1, 2021 and June 1, 2022, respectively. /s/ Cesar L. Alvarez 2022-06-01