X0306 4 2020-12-18 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 2020-12-18 4 M 0 53610 1.00 A 403220 D Common Stock 2020-12-18 4 S 0 53610 1.40 D 349610 D Common Stock 2020-12-21 4 M 0 87500 1.40 A 437110 D Common Stock 2020-12-21 4 S 0 87500 1.75 D 349610 D Stock Option (Right to Buy) 1.00 2020-12-18 4 M 0 53610 1.00 D 2024-04-11 Common Stock 53610 53610 D Stock Option (Right to Buy) 1.40 2020-12-21 4 M 0 87500 1.40 D 2026-01-07 Common Stock 87500 87500 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 option is currently fully vested. /s/ Sean Moran 2020-12-22