Fundraising Fox

Guardant Health

NASDAQ: GH

Redwood City, US Β· Founded 2011 Β· Delaware corporation Β· 4,797 employees on LinkedIn Β· Public Β· 13 known investors

Guardant Health develops blood-based testing (liquid biopsy) for cancer detection and monitoring across all stages of the disease. The company serves oncologists, patients, and biopharmaceutical firms with FDA-approved tests for cancer screening, early-stage risk assessment, and treatment selection.

Also known as GH Β· Guardant Health, Inc.

Founders & leadership

Guardant Health was founded in 2011 by AmirAli Talasaz and Helmy Eltoukhy.

AT
AmirAli TalasazinCo-founder
HEHelmy Eltoukhy
Helmy EltoukhyinCo-founder Β· Chairman and Co-Chief Executive OfficerHelmy Eltoukhy is executive officer and director at Guardant Health, which develops blood-based liquid biopsy tests for cancer detection and monitoring. He has background in DNA sequencing and diagnostics.
MW
Michael WileyExecutive

Board

WH
Warren HogarthBoard director
SKSamir Kaul
Samir Kaulin𝕏Board MemberInvestor at Khosla Ventures

Investors Β· 13

Reported raises Β· per SEC filings

Form D private placements

$500M disclosed across 5 of 8 rounds Β· 2013–2018

β–Ά$320.4MraisedAug 2017 Β· 17 investors Β· Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • Samir KaulDirector
  • Michael WileyExecutive Officer
  • Helmy EltoukhyExecutive Officer, Director
  • AmirAli TalasazExecutive Officer, Director
  • Aaref HilalyDirector
Offering amount
$320.4M
Amount sold
$320.4M
First sale
May 2017
Incorporated
Corporation, Delaware
Federal exemptions
06b
Full filing on SEC EDGAR β†—
β–Ά$82.8MraisedMar 2016 Β· 14 investors Β· Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • Samir KaulDirector
  • Michael WileyExecutive Officer
  • Helmy EltoukhyExecutive Officer, Director
  • AmirAli TalasazExecutive Officer, Director
  • Aaref HilalyDirector
Offering amount
$100M
Amount sold
$82.8M
First sale
Dec 2015
Incorporated
Corporation, Delaware, 2011
Federal exemptions
06b
Full filing on SEC EDGAR β†—
β–Ά$56MraisedMar 2015 Β· 21 investors Β· Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • AmirAli TalasazExecutive Officer, Director
  • Warren HogarthDirector
  • Michael WileyExecutive Officer
  • Helmy EltoukhyExecutive Officer, Director
  • Samir KaulDirector
Offering amount
$60M
Amount sold
$56M
First sale
Dec 2014
Incorporated
Corporation, Delaware, 2011
Federal exemptions
06b
Full filing on SEC EDGAR β†—
β–Ά$31.5MraisedApr 2014 Β· 7 investors Β· Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • Michael WileyExecutive Officer
  • AmirAli TalasazExecutive Officer, Director
  • Warren HogarthDirector
  • Samir KaurDirector
  • Helmy EltoukhyExecutive Officer, Director
Offering amount
$32.5M
Amount sold
$31.5M
First sale
Apr 2014
Incorporated
Corporation, Delaware, 2011
Federal exemptions
06b
Full filing on SEC EDGAR β†—
β–Ά$9.2MraisedFeb 2014 Β· 36 investors Β· Biotechnology
Rule 506(b)
Officers, directors & promoters on the filing
  • Helmy EltoukhyExecutive Officer, Director
  • AmirAli TalasazExecutive Officer, Director
  • Michael WileyExecutive Officer
  • Warren HogarthDirector
Offering amount
$10M
Amount sold
$9.2M
First sale
Apr 2013
Incorporated
Corporation, Delaware, 2011
Federal exemptions
06b
Full filing on SEC EDGAR β†—

Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.

Valuation Β· disclosed

Disclosed events
$3.3Bvaluation at IPOJan 2018
filing β†—

Source: SEC prospectus filings, and round valuations the company or its investors disclosed β€” follow each entry's link for the claim.

Company profile

researched Aug 2026

Guardant Health, Inc. is an American biotechnology company that develops and sells liquid biopsy tests, which detect cancer from mutations and other modifications found in blood samples. Its portfolio spans the stages of cancer care: a screening test for colorectal cancer from a routine blood draw (Shield), tests that help identify risk of recurrence and monitor recurrence in early-stage cancer, comprehensive genomic tests that guide treatment selection and monitor treatment response in advanced cancer, and services for biopharmaceutical drug development.

Core products include Guardant360, a biopsy-free tumor sequencing test launched commercially to oncologists in 2014 that sequences circulating tumor DNA to track tumor genomics and identify associated treatment options; GuardantOMNI, launched in 2017 for biopharmaceutical research; Guardant Reveal, used for residual and recurrent disease monitoring; and the Lunar early-stage cancer assay released for academic and biopharmaceutical research in 2019. The company states it secured the first U.S. FDA-approved blood tests for comprehensive genomic testing and for primary colorectal cancer screening. Guardant360 required two blood samples and examined 73 genes as of 2019, had been used across 50 cancer types by 6,000 oncologists for 100,000 patients, and Japan's Ministry of Health, Labour and Welfare granted regulatory approval of Guardant360 CDx as a companion diagnostic.

The company reports on its website that more than 1,000,000 of its blood tests have been performed by 12,000 doctors to date. Corporate headquarters are at 3100 Hanover Street, Palo Alto, California, with a laboratory at 505 Penobscot Drive, Redwood City, California.

Founding story

Co-founders Helmy Eltoukhy and AmirAli Talasaz met at Stanford University in 2002 and worked together at Illumina until Talasaz departed in 2012. They developed a technique for detecting and monitoring tumor fragments circulating in a patient's bloodstream as an alternative to tissue biopsies, and co-founded Guardant Health during 2012–2013. Early in its history the company acquired multiple patents from Swiss biochemist Maurice Stroun, who became a founding advisor. The company describes its founding premise as making genomic data actionable for routine clinical use through liquid biopsy.

Business model

Guardant Health earns revenue from test fees paid by third-party insurance companies and by drug developers. Tests are ordered by physicians and oncologists; the biopharma segment sells testing and data services supporting drug development. The company reported $374 million in revenue in 2021.

Fee-per-test reimbursement from third-party payers (including Medicare and commercial insurers such as UnitedHealth Group for the Shield colorectal screening test) plus payments from biopharmaceutical customers using its tests in drug development.

Traction

Over 1,000,000 blood tests performed by 12,000 doctors to date per the company website; $374 million in revenue in 2021; Guardant360 used across 50 cancer types by 6,000 oncologists for 100,000 patients and by 50 biopharmaceutical companies as of 2019; Medicare and, as of 2026, UnitedHealth Group coverage for the Shield colorectal screening test.

Latest developments

Company press releases dated July 2026 report second quarter 2026 financial results with increased 2026 revenue guidance, UnitedHealth Group coverage of the Shield blood test for colorectal cancer screening (July 1, 2026), and an awareness campaign featuring actor and cancer advocate Patrick Dempsey memorializing those who died of colorectal cancer (July 28, 2026).

β–ΈFull profile β€” market position, technology, go-to-market, geography, history, risks & controversies

Market position

A publicly traded precision oncology company; a directory listing names GRAIL, Freenome and NeoGenomics as competitors. In colorectal cancer screening, a competing stool-based test was reported as 92 percent accurate versus the 83 percent reported for Guardant's blood test in its 2022 study readout.

Positioned as offering biopsy-free, blood-based tumor sequencing that tracks tumor genomics in real time, with claims of the first U.S. FDA-approved blood tests for comprehensive genomic testing and for primary colorectal cancer screening, and a product line spanning screening, early-stage recurrence monitoring, advanced cancer treatment selection and biopharma services.

Technology

The technology sequences circulating tumor DNA β€” fragments of DNA shed into the bloodstream by dying tumor cells β€” from blood samples to identify actionable tumor genomic alterations, assess treatment response, detect residual disease and detect early signs of cancer. The company positions this as faster than tissue-based methods and performable in a doctor's office.

Go-to-market

Direct sales of laboratory tests to oncologists and healthcare providers, supported by payer reimbursement (Medicare and commercial coverage) and a patient support program, Guardant Access, that assists with insurance eligibility, claims appeals, billing and financial assistance. The company also partners with the National Cancer Institute, large pharmaceutical companies, academic medical centers and patient advocacy organizations such as Susan G. Komen, the Colon Cancer Coalition and Fight Colorectal Cancer, and used a joint venture with SoftBank to reach markets in Africa, Asia and the Middle East.

Oncologists and other physicians ordering tests for patients across all cancer stages, patients undergoing colorectal cancer screening, third-party insurers as payers, and biopharmaceutical companies using the tests and data for drug development.

Geography

Corporate headquarters in Palo Alto, California (approximately 250,000 sq ft at the former Hewlett Packard Enterprise campus), a laboratory in Redwood City, California, and offices and labs in Torrey Pines, San Diego (37,000 sq ft, 55 employees as of 2022). Roughly 900 of about 1,400 employees were in California as of 2022. International expansion into Africa, Asia and the Middle East ran through the Guardant Health AMEA joint venture, and Guardant360 CDx received Japanese regulatory approval as a companion diagnostic.

History

Wikipedia dates the company's founding to 2012, with co-founders Helmy Eltoukhy and AmirAli Talasaz establishing it during 2012–2013; one directory also lists Michael Wiley among founders. Guardant360 went on sale to oncologists in 2014. The company held 40 patents by 2015, announced clinical trial results in 2016 showing detection of disease-associated mutations also present in 94%–100% of solid tissue samples, and launched GuardantOMNI in 2017. It went public on Nasdaq in 2018, raising $237.5 million at a $3.3 billion valuation. Medicare coverage of Guardant360 began in 2018 for select lung cancer patients and expanded to solid tumors in 2019, followed by FDA approval in 2020. In December 2022 it reported results of a 20,000-participant colorectal cancer screening study begun in 2019, and in 2022 it acquired the Guardant Health AMEA joint venture for roughly $178 million.

Risks & controversies

In December 2022, results of the company's 20,000-participant colorectal cancer screening study showed 83 percent accuracy in detecting cancer with a 10 percent false positivity rate; Bloomberg reported this fell short of the 85 percent investors expected and the stock price declined, with a competing stool-based test reported at 92 percent accuracy. Sources also show inconsistencies in reported founding year (2011 internally versus 2012 per Wikipedia) and total funding figures ($550 million per Wikipedia, more than $500 million per one funding report, $1.9 billion per a startup directory).

Compiled by commissioned research from 8 cited public sources β€” announcements, filings, and press listed under research sources below.

Key figures

latest reported
Biopharmaceutical companies using Guardant360Jan 201950 companies
Blood tests performed to dateJan 20261,000,000 tests
Colorectal screening test sensitivity in 20,000-participant studyDec 202283%
EmployeesJan 20221,400 people
Employees in San DiegoJan 202255 people
Genes analyzed by Guardant360Jan 201973 genes
Oncologists using Guardant360Jan 20196,000 oncologists
Ordering physiciansJan 202612,000 doctors
Palo Alto headquarters sizeJan 2022250,000 square feet
Patents heldJan 201540 patents
Patients whose samples were assessed with Guardant360Jan 2019100,000 patients
RevenueJan 2021$374M
San Diego (Torrey Pines) office sizeJan 202237,000 square feet
Total funding raised in first six yearsJan 2018$550M

Company-reported or press-reported figures, each dated to when it was claimed β€” not independently audited.

Competitors Β· 6

by search overlap
Signant Health315 shared keywordsSignant Health provides eClinical technology and services for clinical trial data collection, including electronic data capture, patient and site data solutions, and scientific and operational support. It serves pharmaceutical sponsors and CROs running global clinical trials to generate high-quality data for trial decisions and regulatory submissions.
American Cancer Society (ACS)197 shared keywordsThe American Cancer Society is a nonprofit cancer-fighting organization that combats cancer through advocacy, research, and patient support. It provides information, guidance, caregiver resources, screening guidance, and clinical trial navigation for cancer patients, families, and caregivers, and funds cancer research.
Exact Sciences189 shared keywordsExact Sciences develops diagnostic tests for cancer, including tests that assess hereditary risk, screen for the presence of cancer, and analyze the genomic alterations of a diagnosed cancer to inform treatment decisions. Its products serve patients and clinicians in oncology diagnostics.
Labcorp182 shared keywordsLabcorp provides clinical laboratory testing, diagnostics, and lab data services for patients, healthcare providers, and biopharma companies, including genetic health panels, oncology testing, and self-ordered lab tests. It also offers AI-powered tools such as a results-explaining consumer app, a diagnostic assistant integrated into EHRs, and a laboratory data analytics platform to support drug development and clinical research.
Valant Medical176 shared keywordsValant provides software solutions for behavioral healthcare organizations to improve clinical outcomes and operational efficiency. The platform serves behavioral health practices and treatment centers seeking to streamline care delivery and practice management.
Quest Diagnostics175 shared keywordsQuest Diagnostics is the world's leading provider of diagnostic information services, serving one in three adult Americans and half of US physicians and hospitals. The company offers diagnostic insights and testing services to consumers and healthcare providers to support health decision-making.

Companies competing with Guardant Health for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline Β· 18

launches, deals, and filings
Jul 2026
Second quarter 2026 financial results and increased 2026 revenue guidance

Guardant Health reported second quarter 2026 financial results and increased its 2026 revenue guidance, per a company press release headline.

source β†—

Jul 2026
UnitedHealth Group covers Shield blood test for colorectal cancer screening

Company press release states UnitedHealth Group now covers Guardant Health's Shield blood test for colorectal cancer screening.

source β†—

Dec 2022
Colorectal cancer screening study results reported; stock declined

Guardant Health announced results from a 20,000-participant study, begun in 2019, of its blood-based colorectal cancer screening test in average-risk individuals. The test was reported as 83% accurate at detecting cancer with a 10% false positivity rate; Bloomberg reported the results fell short of the 85% accuracy investors expected and the stock price fell.

source β†—

Jan 2022
Acquisition of Guardant Health AMEA joint venture

Guardant Health purchased the Guardant Health AMEA joint venture for approximately $178 million.

$178M source β†—

Jan 2022
Support for Colon Cancer Coalition Survivorship Council

Guardant Health supported the 2022 launch of the Colon Cancer Coalition's first Survivorship Council, comprising 17 patients, survivors and caregivers affected by colorectal cancer.

source β†—

Aug 2021
Talasaz steps down as board chairman

AmirAli Talasaz has served on the board of directors since January 2013 and occupied the chairman role until August 2021.

source β†—

Jan 2021
Craig Eagle named chief medical officer

Craig Eagle was named chief medical officer in 2021, succeeding Richard B. Lanman, who joined in 2014 and held the CMO role as of 2017.

source β†—

Jul 2020
Lease signed at former Hewlett Packard Enterprise headquarters in Palo Alto

Guardant Health leased two levels of the former Hewlett Packard Enterprise headquarters in Palo Alto, reported as the largest Silicon Valley lease of the year to date; the company subsequently moved its corporate headquarters to the approximately 250,000-square-foot space.

source β†—

Jan 2020
FDA approval of Guardant360

The Guardant360 test received U.S. Food and Drug Administration approval in 2020.

source β†—

Jan 2019
Lunar early-stage cancer assay released for research use

Guardant Health launched the early-stage cancer assay called Lunar for academic and biopharmaceutical research.

source β†—

Jan 2019
Expanded Medicare coverage of Guardant360 for solid tumors

source β†—

Jan 2018
Initial public offering on Nasdaq

The company's U.S. initial public offering raised $237.5 million and valued Guardant Health at $3.3 billion. Shares trade on Nasdaq under the ticker GH.

$237.5M source β†—

Jan 2018
Guardant Health AMEA joint venture with SoftBank launched

A joint venture formed by Guardant Health and SoftBank to expand use of Guardant360 in Africa, Asia and the Middle East launched in 2018.

source β†—

Jan 2018
Medicare coverage of Guardant360 for select lung cancer patients

Medicare began covering the Guardant360 test for select lung cancer patients in 2018, prior to FDA approval.

source β†—

May 2017
$360M round led by SoftBank Group

Guardant Health raised $360 million in a round led by SoftBank Group, with participation from prior investors including Khosla Ventures and Sequoia Capital. Proceeds were earmarked for sequencing the DNA of 1 million cancer patients over five years, an early-detection blood screening test, and a test for residual disease in cancer survivors.

$360M source β†—

Jan 2017
GuardantOMNI launched

The GuardantOMNI test launched in 2017 and has been used for biopharmaceutical research.

source β†—

May 2016
Project Lunar early-detection research program launched

Guardant Health launched Project Lunar, studying hundreds of pre-symptomatic, high-risk people for breast, colorectal, lung, ovarian and pancreatic cancer, in collaboration with UCSF, Samsung Medical Center (Seoul), the University of Colorado and the University of Pennsylvania.

source β†—

Jan 2014
Guardant360 commercial launch to oncologists

The company began selling its Guardant360 liquid biopsy test to oncologists in 2014.

source β†—

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

Legal entities Β· 1

corporate structure
Guardant HealthDelaware

In the news

β–ΈResearch sources Β· 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Guardant Health do?
Nasdaq-listed biotechnology company selling blood-based liquid biopsy tests for cancer screening, treatment selection and monitoring.
Who founded Guardant Health?
Guardant Health was founded by AmirAli Talasaz, Helmy Eltoukhy in 2011.
Who are Guardant Health's investors?
Guardant Health's investors include 8VC, AUTHENTIC VENTURES, Cota Capital, Felicis Ventures, Khosla Ventures, Lightspeed Venture Partners, Lotus Capital, Manta Ray Ventures and 5 more.
How much funding has Guardant Health raised?
Guardant Health has disclosed $500M raised across 5 of its 8 known rounds.
Is Guardant Health publicly traded?
Yes β€” Guardant Health trades on NASDAQ under the ticker GH.
Where is Guardant Health headquartered?
Guardant Health is headquartered in Redwood City, US.