Jounce Therapeutics to Announce Second Quarter 2021 Financial Results and Host a Conference Call on Thursday, August 5, 2021

Jounce Therapeutics, Inc. (NASDAQ: JNCE), a clinical-stage company focused on the discovery and development of novel cancer immunotherapies and predictive biomarkers, today announced that it will report second quarter 2021 financial results and provide a corporate update before market open on Thursday, August 5, 2021. Jounce Therapeutics’ management team will host a live conference call and webcast at 8:00am ET.

Conference Call and WebcastTo access the conference call, please dial [phone] (domestic) or [phone] (international) and refer to conference ID 4291658. The live webcast can be accessed under “Events & Presentations” in the Investors and Media section of Jounce’s website at www.jouncetx.com. The webcast will be archived and made available for replay on the company’s website approximately two hours after the call and will be available for 30 days thereafter.

About Jounce TherapeuticsJounce Therapeutics, Inc. is a clinical-stage immunotherapy company dedicated to transforming the treatment of cancer by developing therapies that enable the immune system to attack tumors and provide long-lasting benefits to patients through a biomarker-driven approach. Jounce currently has multiple development stage programs ongoing while simultaneously advancing additional early-stage assets from its robust discovery engine based on its Translational Science Platform. Jounce’s highest priority program, JTX-8064, is a LILRB2 (ILT4) receptor antagonist shown to reprogram immune-suppressive tumor associated macrophages to an anti-tumor state in preclinical studies. A Phase 1 clinical trial, named INNATE, of JTX-8064 as a monotherapy and in combination with pimivalimab (formerly JTX-4014), Jounce’s internal PD-1 inhibitor, is currently enrolling patients with advanced solid tumors. Jounce’s most advanced product candidate, vopratelimab, is a monoclonal antibody that binds to and activates ICOS, and is currently being studied in the SELECT Phase 2 trial. Pimivalimab is a PD-1 inhibitor intended for combination use in the INNATE and SELECT trials and with Jounce’s broader pipeline. Additionally, Jounce obtained IND clearance for and exclusively licensed worldwide rights to JTX-1811, a monoclonal antibody targeting CCR8 and designed to selectively deplete T regulatory cells in the tumor microenvironment, to Gilead Sciences, Inc. For more information, please visit www.jouncetx.com.

Investor and Media Contacts:

Mark YoreJounce Therapeutics, Inc.+1-857-200-1255 [e-mail]

Julie SeidelStern Investor [e-mail]