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Personalis

Biotech & Life Sciences · Menlo Park, United States · Founded 2011 · IPO 2019

Contract research organization and genome-scale diagnostics services company specializing in genome guided medicine MoreLess

Personalis, Inc. operates as a specialized cancer genomics company, providing advanced sequencing and data analysis services to support the development of next-generation cancer therapies. The company was established in 2011 as a spin-out from Stanford University. The founding team includes CEO John West and a group of Stanford professors: Dr. Euan Ashley, Dr. Atul Butte, Dr. Russ Altman, and Dr. Michael Snyder.

The founders brought extensive and complementary expertise to the venture. John West, the founding CEO who retired at the end of 2022, had a long career in DNA sequencing, including leading the development of automated sequencing systems and serving as CEO of Solexa, which he sold to Illumina in 2007. His interest in the clinical application of genomics was solidified when his family became the first healthy family of four to be sequenced, an experience that led directly to the founding of Personalis. The other co-founders are distinguished academics from Stanford: Dr. Euan Ashley is a physician-scientist known for establishing the field of precision medicine; Dr. Russ Altman's work focuses on applying AI and data science to understand drug action; and Dr. Michael Snyder is a leader in functional genomics, proteomics, and personalized medicine.

Personalis generates revenue primarily through the sale of sequencing and data analysis services. Its business model targets biopharmaceutical companies, academic institutions, and clinical oncologists. The company's main revenue streams come from providing these services for pharmaceutical research and development, population sequencing programs like the U.S. Department of Veterans Affairs Million Veterans Program (VA MVP), and, increasingly, from clinical diagnostic testing. For the full year 2024, Personalis reported revenue of $84.6 million.

The core of the company's offering is its NeXT Platform™, which provides comprehensive molecular data about a patient's cancer and immune response from a single tissue sample, analyzing all of the approximately 20,000 human genes. A key product derived from this platform is NeXT Personal, an ultra-sensitive test designed to detect minimal residual disease (MRD) and cancer recurrence by identifying minute traces of circulating tumor DNA (ctDNA). This personalized approach aims to guide patient care throughout their cancer journey, from initial biopsy to long-term monitoring. The company went public with an initial public offering on the Nasdaq exchange on June 20, 2019, under the ticker symbol "PSNL".

Keywords: cancer genomics, genomic sequencing, precision oncology, personalized medicine, minimal residual disease, MRD testing, cancer recurrence, circulating tumor DNA, ctDNA, next-generation sequencing, NGS, immuno-oncology, biomarker discovery, biopharmaceutical services, tumor profiling, NeXT Platform, John West, Euan Ashley, Russ Altman, Michael Snyder, Stanford University spin-out, clinical diagnostics

Valuation $1.16B
Revenue $79M
Total funding $50–100M

Talent graph

Personalis's talent

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Employees mapped 403 incl. 4 AI specialists
Founders Hidden — book a demo/100 quality score
Key operators 9 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Investors

4 investors on Personalis's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Series A 3 investors entered at this stage
Lightspeed Venture Partners
Mohr Davidow Ventures
Abingworth
Series B+ 1 investor entered at this stage
Merck & Co.

Global footprint

Where Personalis has talent and traffic

Workforce by country
5 countries with
team presence
🇺🇸 United States97.8%
🇨🇳 China0.9%
🇮🇷 Iran0.4%
🇩🇪 Germany0.4%
🇵🇹 Portugal0.4%
5 countries shown
Web traffic by country
39K monthly visits
across markets
🇺🇸 United States52.6%
🇮🇳 India36.4%
🇨🇦 Canada4.4%
🇮🇹 Italy2.8%
🏳️ Korea1.5%
Top 5 markets shown

Patent intelligence

Personalis’s patent portfolio

Estimated portfolio value
$30M

18 active families in the valuation dataset.

Source: Dealroom Patent Intelligence · PatSnap. Portfolio estimates and the family records below have different coverage.

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Market sentiment

What the market is saying about Personalis

An AI-synthesized read of the highest-engagement posts about Personalis on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.

Reading the room on X — pulling top posts and synthesizing themes…

Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour

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