X0306 4 2016-05-26 0 0001595097 Corbus Pharmaceuticals Holdings, Inc. CRBP 0001255348 CATLIN AVERY W C/O CORBUS PHARMACEUTICALS HOLDINGS, INC 100 RIVER RIDGE DRIVE NORWOOD MA 02062 1 0 0 0 Stock Option(right to buy) 3.00 2016-05-26 4 A 0 50000 0.00 A 2026-05-26 Common Stock 50000 50000 D The option award was made in accordance with the terms of the issuer's 2014 Equity Compensation Plan. The option will vest in equal monthly installments over the course of 12 months beginning on the date of grant. /s/ Avery Catlin 2016-05-31