X0306 5 2022-12-31 0 0 0 0000105016 WATSCO INC WSO; WSOB 0001243203 NAHMAD ALBERT H 2665 S. BAYSHORE DRIVE SUITE 901 COCONUT GROVE FL 33133 1 1 0 0 Chairman and CEO Common stock 1494 I See footnote Class B Common stock Class B Common stock 1104214 1104214 I See footnote Class B Common stock Class B Common stock 902006 902006 I See footnote Class B Common stock Class B Common stock 75501 75501 D Class B Common stock Class B Common stock 530081 530081 I See footnote Class B Common stock Class B Common stock 1330000 1330000 I See footnote Class B Common Stock Class B Common Stock 206976 206976 I See footnote Reflects shares held by trust over which Mr. Nahmad maintains effective control. The Class B Common Stock is convertible into Common Stock at any time on a one-for-one basis and has no expiration date. Reflects shares held by Albert Henry Capital L.P., a limited partnership over which Mr. Nahmad maintains effective control. Of the number of shares held, 440,000 remain subject to vesting restrictions. Reflects shares held by My Pal Al, L.P., a limited partnership over which Mr. Nahmad maintains effective control, which are subject to vesting restrictions. Reflects shares held by Mr. Nahmad, which are subject to vesting restrictions. Reflects 498,845 shares held by various trusts over which Mr. Nahmad maintains effective control and 31,236 shares held by custodial accounts for Mr. Nahmad's grandchildren, of which Mr. Nahmad is the custodian. Reflects shares owned by Albert Capital LP, a limited partnership, over which Mr. Nahmad maintains effective control. Reflects shares owned by Colon Boy LP, a limited partnership, over which Mr. Nahmad maintains effective control. /s/ Albert H. Nahmad 2023-01-12