144 0001255348 XXXXXXXX LIVE 0001595097 Corbus Pharmaceuticals Holdings, Inc. 001-37348 500 RIVER RIDGE DRIVE NORWOOD MA 02062 617-963-0103 CATLIN AVERY W Director Common Stock Stifel Nicolaus & Company Inc.

501 N Broadway St. Louis MO 63102

888 50109.00 12043940 09/04/2024 NASDAQ Common Stock 09/23/2014 Option Exercise Issuer N 1667 09/04/2024 Cash Y 09/04/2024 /s/ Dominick Iadicicco, as a duly authorized representative of STIFEL, as attorney-in-fact for Avery W Catlin