X0306 4 2022-10-15 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 2022-10-15 4 F 0 311408 271.73 D Class B Common stock 311408 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 Ownership in Watsco, Inc. Profit Sharing Retirement Plan and Trust. 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 following the reported transaction, 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 held by Albert Capital LP, a limited partnership, over which Mr. Nahmad maintains effective control. Reflects shares held by Colon Boy LP, a limited partnership, over which Mr. Nahmad maintains effective control. /s/ Albert H. Nahmad 2022-10-18