X0306 4 2019-09-18 0 0001512762 Coherus BioSciences, Inc. CHRS 0001427569 Viret Jean-Frederic COHERUS BIOSCIENCES, INC. 333 TWIN DOLPHIN DRIVE, SUITE 600 REDWOOD CITY CA 94065 0 1 0 0 Chief Financial Officer Common Stock, $0.0001 par value 2019-09-18 4 M 0 3159 10.05 A 11672 D Common Stock, $0.0001 par value 2019-09-18 4 S 0 3159 20.4368 D 8513 D Stock Option (Right to Buy) 10.05 2019-09-18 4 M 0 3159 0.00 D 2028-02-01 Common Stock 3159 117364 D The sales reported in this Form 4 were effected pursuant to one or more Rule 10b5-1 trading plans adopted by Reporting Person. The transaction was executed in multiple trades in prices ranging from $19.94 to $20.725, inclusive. The price reported in Column 4 above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the Issuer, or a stockholder of the Issuer, information regarding the number of shares and prices at which the transaction was effected. The underlying shares subject to the option vest and become exercisable as to 1/48th of the total number of shares subject to the option in successive, equal monthly installments measured from February 1, 2018, subject to Reporting Person's continued service relationship with the Issuer on each such vesting date. /s/ Jean-Frederic Viret 2019-09-20