X0306 4 2020-12-16 0 0001595097 Corbus Pharmaceuticals Holdings, Inc. CRBP 0001451495 Moran Sean F. C/O CORBUS PHARMACEUTICALS HOLDINGS, INC 500 RIVER RIDGE DRIVE NORWOOD MA 02062 0 1 0 0 Chief Financial Officer Common Stock 2020-12-16 4 M 0 36923 0.1657 A 386533 D Common Stock 2020-12-16 4 S 0 36923 1.317 D 349610 D Stock Option (Right to Buy) 0.1657 2020-12-16 4 M 0 36923 0.1657 D 2024-01-28 Common Stock 36923 36923 D The sale of the shares of Common Stock were made pursuant to a plan intended to comply with Rule 10b5-1 of the Exchange Act, previously entered into on December 14, 2020 The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $1.31 to $1.35 per share, inclusive. The reporting person undertakes to provide to Corbus Pharmaceuticals Holdings, Inc., any security holder of Corbus Pharmaceuticals Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth herein The option is currently fully vested. /s/ Sean Moran 2020-12-18