Skip to main content
Skip to main content
GRTS logo

Gritstone bio, Inc. (GRTS) Stock Analysis

Educational signal · not a buy or sell recommendation · How to read this

DELISTED

What happened to Gritstone bio, Inc. (GRTS) stock?

Gritstone bio, Inc. (GRTS) no longer trades on public markets. The figures below are historical and are not a current quote.

MCap: $3.80M| Vol: 55.25M| 52-wk range: $0.03 – $3.17

Market cap $3.80M is the value of all shares combined.

Data from FMP · Methodology

For informational purposes only. Not financial advice. Machine-generated analysis by Stock Expert AI — model gemini-2.0-flash, generated May 9, 2026. Editorial oversight is systemic, not page-by-page. Editorially accountable: Sedat ANAK, Founder and Editor-in-Chief. Data sources: Financial Modeling Prep, Yahoo Finance, SEC EDGAR

Gritstone bio, Inc. (GRTS). Gritstone bio, Inc. is a clinical-stage biotechnology company focused on developing immunotherapies for cancer and infectious diseases. Market cap: $3.80M, Sector: Healthcare.

Last analyzed: May 9, 2026
Gritstone bio, Inc. is a clinical-stage biotechnology company focused on developing immunotherapies for cancer and infectious diseases. Their pipeline includes neoantigen-based and off-the-shelf immunotherapies, as well as vaccines for SARS-CoV-2 and HIV.

Analyst Coverage for GRTS: GRTS does not currently have published analyst price targets in our coverage universe. This is common for smaller-cap names with limited Wall Street coverage. In the absence of analyst consensus, our AI model evaluates GRTS against Healthcare peers across nine fundamental dimensions and assigns a neutral fundamental signal based on the underlying data.

Watch the GRTS film Every key number, told as a short cinematic story — just press play. ~2 min

Dated analysis: the newest financial statements on file are 26 months old (Jun 30, 2024), so the figures and score below describe that period, not today.

Council Score · Weighted Average of 3 Disciplines
Split View 35/100 · D

GRTS: 1/2 scored disciplines lean bearish. Dominant signal: Seth Klarman bearish.

How is this calculated? →
Legends Council · 5 Legends + Moon AI

AI simulations built from the named investors' published principles. Not affiliated with, endorsed by, or the opinion of these individuals. How these lenses are built

Dalio-style lens (simulated)Ray Dalio
Favorable read
Englander-style lens (simulated)Izzy Englander
Neutral read
Klarman-style lens (simulated)Seth Klarman
Unfavorable read
Moon AI lens (model)
Unfavorable read
Munger's Mindset · Balance Sheet & Valuation
Financial Health
Negative
Margin of Safety
Fairly Valued
Council Score · Weighted Average of 3 Disciplines · See tabs for details →
The lenses are modelled on the published principles of the investors named. We are not affiliated with them, they have not endorsed this, and it is not their opinion of this stock.

Gritstone bio, Inc. (GRTS) Healthcare & Pipeline Overview

CEOAndrew R. Allen BCh, BM, MA, MRCP,
Employees231
HeadquartersEmeryVille, CA, US
IPO Year2018

Gritstone bio, Inc. is a clinical-stage biotechnology firm specializing in the development of novel cancer and infectious disease immunotherapies, including personalized neoantigen-based treatments and off-the-shelf solutions, positioning them within the competitive biotechnology landscape focused on innovative immune-oncology and vaccine platforms.

Data Provenance | Financial Data Quantitative Analysis Analysis: May 9, 2026

What Is the Investment Thesis for GRTS?

AI-written as of May 9, 2026 — figures and tone reflect the data available then, not today's score.

Gritstone bio, Inc. presents a high-risk, high-reward investment opportunity within the biotechnology sector. The company's personalized neoantigen approach with GRANITE and its off-the-shelf SLATE immunotherapy represent potential value drivers in the oncology space. Success in clinical trials for either program could lead to significant market appreciation. The CORAL vaccine platform offers additional upside potential in the infectious disease market, particularly if it demonstrates superior efficacy against emerging SARS-CoV-2 variants. However, the company's negative profit margin of -10405.0% and gross margin of -470.3% highlight the significant financial risks associated with clinical-stage biotechnology companies. Continued funding and successful navigation of the regulatory landscape are crucial for Gritstone's long-term viability. Investors should carefully consider the inherent risks and uncertainties associated with drug development before investing.

Based on FMP financials and quantitative analysis

GRTS Key Highlights

AI-written as of May 9, 2026 — figures and tone reflect the data available then, not today's score.

Gritstone bio, Inc. is a clinical-stage biotechnology company focused on developing immunotherapies for cancer and infectious diseases.

  • The company's lead product candidate, GRANITE, is a neoantigen-based immunotherapy for the treatment of solid tumors.
  • Gritstone is also developing SLATE, an off-the-shelf immunotherapy candidate for the treatment of common solid tumors.
  • The company is developing CORAL, a SARS-CoV-2 vaccine platform designed to deliver spike and additional SARS-CoV-2 T cell epitopes.
  • Gritstone has strategic collaborations with bluebird bio, Inc. and Gilead Sciences, Inc.

Who Are GRTS's Competitors?

GRTS is benchmarked below against 8 industry peers on price, market cap, and our AI MoonshotScore.

Company Price Change Market Cap MoonshotScore
BMY Bristol-Myers Squibb Company $63.34 -0.64% $129B 905-pillar
MRNA Moderna, Inc. $136.62 +0.74% $54.2B 305-pillar
GILD Gilead Sciences, Inc. $144.81 -0.58% $180B 635-pillar
RLYB Rallybio Corporation $16.75 -1.30% $88.9M 825-pillar
ICCC ImmuCell Corporation $9.91 +0.05% $89.7M 775-pillar
ORMP Oramed Pharmaceuticals Inc. $4.74 -0.38% $194M 785-pillar
NAGE Niagen Bioscience Inc $3.04 -0.49% $242M 665-pillar
QTTB Q32 Bio Inc. $10.93 +1.96% $325M 685-pillar

AI Score by Stock Expert AI · Price data: FMP / Yahoo Finance

What Are GRTS's Key Strengths?

Innovative neoantigen-based immunotherapy platform.

  • Diverse pipeline of cancer and infectious disease therapies.
  • Strategic collaborations with established pharmaceutical companies.
  • Experienced management team with expertise in drug development.

What Are GRTS's Weaknesses?

Clinical-stage company with no currently approved products.

  • High research and development costs.
  • Dependence on successful clinical trial outcomes.
  • Negative profit and gross margins.

What Could Drive GRTS Stock Higher?

Clinical trial data releases for GRANITE in various solid tumors.

  • Clinical trial data releases for SLATE in common solid tumors.
  • Progress updates on the development of the CORAL vaccine platform.
  • Strategic collaborations and partnerships to advance pipeline development.
  • Regulatory milestones and approvals for Gritstone's product candidates.

What Are the Key Risks for GRTS?

Financial-distress signal — its Altman Z-Score of -9.73 sits in the distress zone (elevated bankruptcy risk).

  • Weak fundamentals — a Piotroski F-Score of 1/9 flags soft profitability, leverage or efficiency.
  • Insider selling — insiders were net sellers of roughly $2.4M recently.
  • Unsuccessful clinical trial outcomes for GRANITE and SLATE.
  • Competition from larger pharmaceutical companies with more resources.
  • Regulatory delays or rejection of Gritstone's product candidates.
  • High research and development costs.
  • Dependence on securing funding to support operations.

What Are the Growth Opportunities for GRTS?

  • Expansion of GRANITE into additional cancer types: Gritstone's personalized neoantigen immunotherapy, GRANITE, is currently being evaluated in clinical trials for various solid tumors. Expanding the clinical development program to include additional cancer types, such as ovarian cancer or melanoma, could significantly increase the potential market for GRANITE. The market for cancer therapies is projected to reach $286 billion by 2028, offering substantial growth opportunities for successful immunotherapies.
  • Advancement of SLATE through clinical trials: SLATE, Gritstone's off-the-shelf immunotherapy candidate, targets shared neoantigens common across multiple solid tumors. Successful clinical trials demonstrating the efficacy and safety of SLATE could lead to its approval and commercialization, providing a readily available treatment option for a broader patient population. The timeline for SLATE's development will depend on the progress of ongoing and future clinical trials.
  • Development and commercialization of CORAL vaccine platform: Gritstone's CORAL vaccine platform is designed to deliver spike and additional SARS-CoV-2 T cell epitopes for enhanced protection against current and future variants. Successful development and commercialization of a CORAL-based vaccine could generate significant revenue, particularly if it demonstrates superior efficacy against emerging variants.
  • Strategic partnerships and collaborations: Gritstone has already established strategic collaborations with companies like bluebird bio, Inc. and Gilead Sciences, Inc. Expanding these partnerships or forming new collaborations with other pharmaceutical or biotechnology companies could provide access to additional resources, expertise, and funding to accelerate the development and commercialization of its product candidates. These partnerships can also help mitigate the financial risks associated with drug development.
  • Expansion into new therapeutic areas: While Gritstone's primary focus is on cancer and infectious diseases, the company could explore opportunities to expand into other therapeutic areas, such as autoimmune diseases or inflammatory disorders. This diversification could broaden the company's pipeline and reduce its reliance on the success of its current product candidates. The market for autoimmune disease therapies is projected to reach $150 billion by 2027.

What Are GRTS's Competitive Advantages?

  • Proprietary EDGE platform for identifying and targeting tumor-specific neoantigens.
  • Personalized neoantigen-based immunotherapy approach.
  • Off-the-shelf immunotherapy candidate targeting shared neoantigens.
  • Strategic collaborations with established pharmaceutical companies.

What Does GRTS Do?

Gritstone bio, Inc., founded in 2015 and headquartered in Emeryville, California, is a clinical-stage biotechnology company dedicated to developing innovative immunotherapies for the treatment of various cancers and infectious diseases. The company's primary focus is on harnessing the power of the immune system to target and eliminate cancer cells and combat infectious pathogens. Gritstone's lead product candidate, GRANITE, is a personalized neoantigen-based immunotherapy designed for solid tumors, including metastatic non-small cell lung cancer, gastroesophageal cancer, bladder cancer, and microsatellite stable colorectal cancer. This personalized approach involves identifying unique mutations (neoantigens) within a patient's tumor and creating a customized immunotherapy to target those specific mutations. In addition to GRANITE, Gritstone is developing SLATE, an 'off-the-shelf' immunotherapy candidate targeting shared neoantigens common across various solid tumors, such as metastatic non-small cell lung cancer, colorectal cancer, and pancreatic cancer. This off-the-shelf approach aims to provide a more readily available treatment option for a broader patient population. Furthermore, Gritstone is actively engaged in developing vaccines, including CORAL, a SARS-CoV-2 vaccine platform designed to deliver spike and additional SARS-CoV-2 T cell epitopes for enhanced protection against current and future variants. They are also working on a therapeutic vaccine candidate aimed at treating and potentially curing HIV infection. Gritstone has established strategic collaborations with companies like bluebird bio, Inc. and Gilead Sciences, Inc., and maintains a license agreement with Genevant Sciences GmbH, to further advance its research and development efforts.

What Products and Services Does GRTS Offer?

  • Develop personalized neoantigen-based immunotherapies for cancer treatment.
  • Create off-the-shelf immunotherapies targeting shared neoantigens in common solid tumors.
  • Design and develop vaccines for infectious diseases, including SARS-CoV-2 and HIV.
  • Conduct clinical trials to evaluate the safety and efficacy of their immunotherapy and vaccine candidates.
  • Establish strategic collaborations with other pharmaceutical and biotechnology companies.
  • Utilize their proprietary EDGE platform to predict and target tumor-specific neoantigens.

How Does GRTS Make Money?

  • Develop and out-license immunotherapies and vaccines to pharmaceutical companies.
  • Generate revenue through research and development collaborations with other companies.
  • Potentially manufacture and sell their own products if clinical trials are successful and regulatory approval is obtained.
  • Focus on discovering and developing novel immunotherapies and vaccines.

What Industry Does GRTS Operate In?

Gritstone bio, Inc. operates within the competitive biotechnology industry, which is characterized by rapid innovation, high research and development costs, and stringent regulatory requirements. The market for cancer immunotherapies is experiencing significant growth, driven by the increasing prevalence of cancer and the limitations of traditional treatment options. The development of effective vaccines against infectious diseases, such as SARS-CoV-2 and HIV, also represents a significant market opportunity. Gritstone's personalized neoantigen approach and off-the-shelf immunotherapy platform position it to potentially capture a share of this growing market, but it faces competition from larger, more established pharmaceutical companies and other emerging biotechnology firms.

Who Are GRTS's Key Customers?

  • Pharmaceutical companies seeking to license or acquire novel immunotherapies and vaccines.
  • Patients with cancer and infectious diseases who may benefit from Gritstone's therapies.
  • Healthcare providers who prescribe and administer Gritstone's therapies.
  • Government agencies and non-profit organizations involved in public health initiatives.
Model self-rating on this text: 71% (not a measure of the evidence) Updated: May 9, 2026

Research confidence

Low 15/100

Thin evidence — scoring coverage unknown. Treat this as a starting point, not a conclusion.

  • Scoring coverage unknown
  • Price 5 days old
  • Latest filing 759 days ago
  • No analyst coverage

MoonshotScore History

Recorded daily since 2026-08-23 · 4 snapshots

2026-08-23 44
2026-08-24 44
2026-08-25 44
2026-08-26 44

What changed?

The score has stayed at 44.

Over the same 3 days the stock moved +0.0%.

Company Profile

Gritstone bio, Inc. operates in the Biotechnology industry within the Healthcare sector. It is headquartered in EmeryVille, US. The company is led by CEO Andrew R. Allen BCh, BM, MA, MRCP,. GRTS has traded publicly since 2018.

Key Financial Metrics

Return on assets is -77.9%, showing how much profit it generates from its asset base. A current ratio of 3.20 indicates the company holds enough short-term assets to cover its near-term obligations.

GRTS Valuation & Market Position

With a $3.80M market cap, Gritstone bio, Inc. sits in the micro-cap segment of the market.

Quarterly Financial Performance: Gritstone bio, Inc.

Revenue for Gritstone bio, Inc. came in at $57K during Q2 FY2024, a 16.3% improvement versus the preceding quarter. The company recorded a net loss of $23.4M, with diluted EPS of $-0.16.

F-Score 1/9

Financial Health

Gritstone bio, Inc.'s Piotroski F-Score is 1/9, a 9-point checklist of profitability, leverage and efficiency — flagging fundamental weakness worth scrutiny. Its Altman Z-Score of -9.73 places it in the distress zone, a signal of elevated financial risk.

6/8 beats

Earnings Track Record

Gritstone bio, Inc. has beaten Wall Street's EPS estimate in 6 of its last 8 reported quarters — a consistent record of delivering on expectations.

FY2026 est

Forward Outlook

Wall Street analysts project Gritstone bio, Inc. revenue of about $35.0M for fiscal 2026, with EPS near $-0.32.

Net selling

Insider Activity

The most recent 12 insider filings for Gritstone bio, Inc. break down as 12 sales and 0 purchases. On net that is roughly 1.1M shares disposed (about $2.4M), a signal worth weighing alongside the fundamentals.

GRTS Financials

Fundamental Snapshot

Return on Equity (TTM)
-124.4%
Current Ratio
3.2

Based on FMP financials and quantitative analysis

Bull Case vs Bear Case

Bull Case

  • Innovative neoantigen-based immunotherapy platform.
  • Diverse pipeline of cancer and infectious disease therapies.
  • Strategic collaborations with established pharmaceutical companies.
  • Experienced management team with expertise in drug development.

Bear Case

  • Clinical-stage company with no currently approved products.
  • High research and development costs.
  • Dependence on successful clinical trial outcomes.
  • Negative profit and gross margins.

AI-generated arguments based on insider flow, news sentiment and technicals — not financial advice · May 2026

Recent Quarterly Results

Quarter Revenue Net Income EPS
Q2 FY2024 $57,000 -$23M -$0.16
Q1 FY2024 $49,000 -$40M -$0.34

Q2 FY2024 · filed 13 Aug 2024 · SEC EDGAR →

Based on FMP financials and quantitative analysis

GRTS Latest News

Leadership: Andrew R. Allen BCh, BM, MA, MRCP,

CEO

Andrew R. Allen is the Chief Executive Officer of Gritstone bio, Inc. He holds degrees in Bachelor of Medicine and Bachelor of Surgery (BCh, BM) from the University of Oxford, as well as a Master of Arts (MA) and Membership of the Royal College of Physicians (MRCP). Allen has extensive experience in the pharmaceutical and biotechnology industries, with a focus on oncology and immunology. Prior to joining Gritstone, he held leadership positions at various companies, where he was responsible for overseeing clinical development programs and commercialization strategies.

Track Record: Since becoming CEO of Gritstone bio, Andrew Allen has focused on advancing the company's pipeline of immunotherapies and vaccines. He has overseen the progress of GRANITE and SLATE through clinical trials, as well as the development of the CORAL vaccine platform. Allen has also been instrumental in establishing strategic collaborations with companies like bluebird bio and Gilead Sciences. His leadership has been focused on driving innovation and securing funding to support the company's research and development efforts.

Common Questions About GRTS (Healthcare)

What happened to Gritstone bio, Inc. (GRTS) stock?

Gritstone bio, Inc. (GRTS) no longer trades on public markets. The figures below are historical and are not a current quote.

Can I still buy GRTS shares?

No. GRTS stopped trading on public markets, so the shares are not available through a broker. Anything you see quoted for GRTS elsewhere is historical data, not a live market.

Are the figures on this page current?

No. Every number here is the last value recorded before GRTS stopped trading. Nothing on this page updates, and none of it is a current quote.

Why does this page still exist?

Because people still search for what happened to Gritstone bio, Inc.. An archived profile that states the delisting plainly is more useful than a dead link — provided it is labelled as history, which is what this page does.

What does Gritstone bio, Inc. do?

Gritstone bio, Inc. is a clinical-stage biotechnology company focused on developing innovative immunotherapies for the treatment of cancer and infectious diseases.

What do analysts say about GRTS stock?

As of May 9, 2026, analyst coverage of Gritstone bio, Inc. (GRTS) is limited given its market capitalization and clinical-stage nature.

What are the main risks for GRTS?

Gritstone bio, Inc. faces several key risks inherent to clinical-stage biotechnology companies. A primary risk is the uncertainty of clinical trial outcomes for its lead product candidates, GRANITE and SLATE.

Disclaimer: This content is for informational purposes only and does not constitute investment advice. Always do your own research and consult a financial advisor.

Official Resources

Analysis updated
Data Sources & Methodology
Market data powered by Financial Modeling Prep & Yahoo Finance. AI analysis by Stock Expert AI proprietary algorithms. Technical indicators via industry-standard calculations. Last updated: .
Data Provenance
Sources: Financial Modeling Prep (FMP) — Primary · Yahoo Finance — Fallback · Alpaca — Tertiary
Last fetched:
Cache TTL: Quote 5min · Profile 7d · Financials 7d · Insider 48h
How we use AI: Numbers are pulled directly from FMP & Yahoo Finance — our AI writes the analysis, it never edits the figures.
Data provided as-is for educational purposes. Not financial advice. Methodology

Data provided for informational purposes only.

Analysis Notes
  • Information is based on available data and may be subject to change.
  • Clinical trial outcomes are inherently uncertain.
  • Financial data is based on historical performance and may not be indicative of future results.
Data Sources
Financial Modeling Prep (FMP)Stock Expert AI proprietary analysis

More Stocks We Cover