X0306 4 2017-02-01 1 0001640455 Jounce Therapeutics, Inc. JNCE 0001641080 Hadley Harbor Master Investors (Cayman) L.P. C/O WELLINGTON MANAGEMENT COMPANY LLP 280 CONGRESS STREET BOSTON MA 02210 0 0 1 0 Common Stock 2017-02-01 4 C 0 719476 A 719476 D Series B Convertible Preferred Stock 2017-02-01 4 C 0 2654867 0.00 D Common Stock 719476 0 D Each share of Series B convertible preferred stock converted into 0.271003 shares of common stock immediately prior to the amendment and restatement by Jounce Therapeutics, Inc. of its certificate of incorporation in connection with the closing of its initial public offering, and had no expiration date. Hadley Harbor Master Investors (Cayman) L.P., By: Wellington Alternative Investments LLC, as General Partner, /s/ Matthew N. Shea, By: Matthew N. Shea Title: Managing Director and Counsel 2017-01-31