144 0001197038 XXXXXXXX LIVE 0001318220 WASTE CONNECTIONS, INC. 001-34370 6220 Hwy 7, Suite 600 Woodbridge A6 L4H4G3 (905) 532-7510 DOMENICO PIO Officer Common CANACCORD GENUITY CORP. (SOFI)

609 Granville Street Suite 2200 Vancouver A1 V7Y1H2

10000 1912455.00 258085200 03/03/2025 TSX Common 06/30/2019 Restricted Stock Issuer N 10000 06/30/2019 Not Applicable Y Long shares received from restricted stock vestings from 06/30/2019 to 02/18/2025. 03/03/2025 /s/ Domenico D Pio