X0306 4 2015-04-20 0 0001435049 ADURO BIOTECH, INC. ADRO 0001636810 Morningside Venture (VI) Investments Ltd C/O THC MANAGEMENT SERVICES S.A.M. 2ND FLOOR, LE PRINCE DE GALLES 3-5 AVENUE DES CITRONNIERS O9 MC 98000 MONACO 0 0 1 0 Common Stock 2015-04-20 4 C 0 7564631 A 7564631 D Common Stock 2015-04-20 4 C 0 9039857 A 16604488 D Common Stock 2015-04-20 4 C 0 1997854 A 18602342 D Common Stock 2015-04-20 4 P 0 441176 17.00 A 19043518 D Series B Preferred Stock 2015-04-20 4 C 0 7564631 0.00 D Common Stock 7564631 0 D Series C Preferred Stock 2015-04-20 4 C 0 9039857 0.00 D Common Stock 9039857 0 D Series D Preferred Stock 2015-04-20 4 C 0 1997854 0.00 D Common Stock 1997854 0 D Series B Preferred Stock Warrant (right to buy) 1.1937 2015-04-20 4 D 0 61410 0.00 D 2011-04-15 2016-04-15 Series B Preferred Stock 44215 0 D Common Stock Warrant (right to buy) 1.66 2015-04-20 4 A 0 44215 0.00 A 2011-04-15 2016-04-15 Common Stock 44215 44215 D Each share of Series B Preferred Stock, Series C Preferred Stock, and Series D Preferred Stock automatically converted into 0.72 of a share of common stock immediately prior to the closing of the Issuer's initial public offering, and has no expiration date. Pursuant to the terms of the Series B Preferred Stock Warrant (the "Old Warrant"), effective upon conversion of all outstanding shares of Series B Preferred Stock of the Issuer, the Old Warrant converts into a Warrant to purchase shares of Common Stock of the Issuer (the "New Warrant"). The two transactions reported in Table II above show the cancellation of the Old Warrant and acquisition of the New Warrant in connection with the automatic conversion of the Series B Preferred Stock into 0.72 of a share of common stock immediately prior to the closing of the Issuer's initial public offering. /s/ Jennifer Lew, Attorney-in-Fact 2015-04-22