First Guardant Health Liquid Biopsy Testing Service in Europe Now Operational at Vall d’Hebron Institute of Oncology - Seite 2

In 2020, there were over 282,000 new cancer cases in Spain and approximately 113,000 cancer deaths, with lung cancer and colon cancer being the leading causes of cancer-related death.¹ Guardant Health’s tests are used by oncologists around the world to guide treatment decisions across solid tumor cancers, and by pharmaceutical companies and academic researchers in clinical trials to accelerate precision medicine drug development.

About Guardant Health

Guardant Health is a leading precision oncology company focused on helping conquer cancer globally through use of its proprietary tests, vast data sets and advanced analytics. The Guardant Health oncology platform leverages capabilities to drive commercial adoption, improve patient clinical outcomes and lower healthcare costs across all stages of the cancer care continuum. Guardant Health has commercially launched Guardant360, Guardant360 CDx, Guardant360 TissueNext, Guardant360 Response, and GuardantOMNI tests for advanced stage cancer patients, and Guardant Reveal for early-stage cancer patients. The Guardant Health screening portfolio, including the Shield test, aims to address the needs of individuals eligible for cancer screening.

About Vall d’Hebron Institute of Oncology

Established in 2006, the Vall d’Hebron Institute of Oncology (VHIO) is a leading comprehensive cancer research center of excellence where its scientists and research physicians adopt a purely translational research model, working together as multidisciplinary teams to both accelerate and advance personalized and targeted therapies against cancer. Undertaking one of Spain’s most dynamic cancer research programs, VHIO is dedicated to delivering on the promise of precision medicine in oncology – turning cancer discovery into more effective treatments and better practice for the care of our patients. VHIO is one of the seven leading European cancer research centers that have joined forces to create Cancer Core Europe, a Cancer Association carrying out innovative research propelling cancer medicine into a new era through translational research.

Guardant Health Forward-Looking Statement

This press release contains forward-looking statements within the meaning of federal securities laws, including statements regarding the potential utilities, values, benefits and advantages of Guardant Health’s liquid biopsy tests or assays, which involve risks and uncertainties that could cause the actual results to differ materially from the anticipated results and expectations expressed in these forward-looking statements. These statements are based on current expectations, forecasts and assumptions, and actual outcomes and results could differ materially from these statements due to a number of factors. These and additional risks and uncertainties that could affect Guardant Health’s financial and operating results and cause actual results to differ materially from those indicated by the forward-looking statements made in this press release include those discussed under the captions “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operation” and elsewhere in its Annual Report on Form 10-K for the year ended December 31, 2021 and in its other reports filed with the Securities and Exchange Commission. The forward-looking statements in this press release are based on information available to Guardant Health as of the date hereof, and Guardant Health disclaims any obligation to update any forward-looking statements provided to reflect any change in its expectations or any change in events, conditions, or circumstances on which any such statement is based, except as required by law. These forward-looking statements should not be relied upon as representing Guardant Health’s views as of any date subsequent to the date of this press release.