144 0001237784 XXXXXXXX LIVE 0001124941 BEACON ROOFING SUPPLY, INC. 000-50924 505 Huntmar Park Drive, Suite 300 Herndon VA 20170 (571) 323-3939 Robert M. McLaughlin Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 38th Floor New York NY 10004

1500 113788.65 63157642 11/10/2023 NASDAQ Common 02/10/2018 Restricted Stock Issuer N 1500 02/10/2018 Not Applicable Y Sales that were executed on November 10, 2023 are being reported on this Form 144 filed on November 13, 2023 given the EDGAR system was not accepting filings on November 10 in observance of the federal holiday. 11/13/2023 /s/ Robert Michael McLaughlin