Paper details vaccine design optimization process of Gritstone’s “off-the-shelf” or shared neoantigen vaccine platform, SLATE Discovery of a novel immunodominance hierarchy of tumor neoantigens (including KRAS) enabled the development of a more potent, KRAS-specific vaccine candidate (SLATE-KRAS) being studied by Steven A. Rosenberg of the National Cancer Institute (NCI) Publication underscores the important role of antigen... Read More

EMERYVILLE, Calif., April 08, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor and scientific conferences. Select events (marked by *) will be webcasted live and webcast details will be available on the ‘Events’ page of Gritstone bio’s website:... Read More

State-of-the-art neoantigen prediction platform (EDGE™) now predicts HLA Class I presentation of epitopes with >80% accuracy Newly developed EDGE-II model achieves superior predictive performance of HLA Class II presentation and CD4+ immunogenicity over publicly available models Combined with Gritstone's vaccine vectors, EDGE has demonstrated best-in-class potential in identifying neoantigens capable of eliciting T cell... Read More

EMERYVILLE, Calif., April 01, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced the pricing of an approximately $32.5 million underwritten public offering of its common stock (or pre-funded warrants to purchase common stock in lieu thereof) and accompanying common warrants to purchase common stock (or... Read More

EMERYVILLE, Calif., April 01, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that it has commenced an underwritten public offering of shares of its common stock (or pre-funded warrants to purchase common stock in lieu thereof) and accompanying common warrants to purchase common stock (or pre-funded... Read More

Early progression-free survival (PFS) trends favor GRANITE recipients with hazard ratios of 0.82 in the overall population ([95% CI, 0.34-1.67]; 62% censored) and 0.52 (48% relative risk reduction of progression or death with GRANITE vs. control) in a high-risk group, where clinical data are more mature ([95% CI, 0.15-1.38]; 44% censored); >90% of high-risk patients have liver metastases Short-term molecular response (as... Read More

Preliminary data from Phase 2 portion of Phase 2/3 study evaluating GRANITE, Gritstone’s personalized cancer vaccine in front-line metastatic, microsatellite-stable colorectal cancer (MSS-CRC) remain expected in 1Q 2024 National Cancer Institute-led Phase 1 study evaluating Gritstone's "off-the-shelf" cancer vaccine, SLATE, combined with neoantigen cell therapy expected to begin in the coming months Gritstone incorporating... Read More

EMERYVILLE, Calif., Feb. 29, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced an approximately 40% reduction of its workforce. The move comes following the recently announced delay of the proposed CORAL Phase 2b study, which resulted in Gritstone not receiving external funding it previously anticipated... Read More

EMERYVILLE, Calif., Feb. 21, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor and scientific conferences: 2024 BIO CEO & Investor Conference (Panel) Panel Title: Reviewing Vaccine Pipeline Breakthroughs and Barriers Date and Time: Monday,... Read More

EMERYVILLE, Calif., Feb. 12, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that it is now preparing to launch the Phase 2b head-to-head trial of its next-generation COVID-19 vaccine in the Fall of 2024 rather than 1Q24. This is to allow use of fully GMP-grade raw materials in the vaccine, which is... Read More

EMERYVILLE, Calif., Feb. 08, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted six employees nonqualified stock options to purchase an aggregate of 147,000 shares of its common stock with an exercise price of $2.26, which is equal... Read More

EMERYVILLE, Calif., Jan. 17, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor conference: B. Riley Securities' 4 th Annual Oncology Conference (Fireside Chat) Date and Time: Thursday, January 18, 2024 at 1:30pm ET Presenter: Andrew Allen, M.D.,... Read More

EMERYVILLE, Calif., Jan. 10, 2024 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted two employees nonqualified stock options to purchase an aggregate of 18,500 shares of its common stock with an exercise price of $2.10, which is equal... Read More

EMERYVILLE, Calif., Dec. 07, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted four employees nonqualified stock options to purchase an aggregate of 42,000 shares of its common stock with an exercise price of $1.53, which is equal... Read More

EMERYVILLE, Calif., Nov. 20, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor conferences: 6th Annual Evercore ISI HealthCONx Conference (Fireside Chat) Presentation Date and Time: Wednesday, November 29, 2023 at 10:00am ET Speaker: Andrew... Read More

BARDA contract and IDWeek presentations position Gritstone’s self-amplifying mRNA (samRNA) as a leading next-generation approach to COVID-19 prevention; preparations underway for Phase 2b head-to-head study evaluating samRNA candidate versus an approved COVID-19 vaccine Preliminary data from Phase 2 portion of Phase 2/3 study evaluating Gritstone’s personalized cancer vaccine (PCV), GRANITE, in first-line metastatic,... Read More

EMERYVILLE, Calif., Nov. 07, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted one employee nonqualified stock options to purchase an aggregate of 4,600 shares of its common stock with an exercise price of $1.83, which is equal to... Read More

VANCOUVER, British Columbia and BASEL, Switzerland, Oct. 12, 2023 (GLOBE NEWSWIRE) -- Genevant Sciences , a leading nucleic acid delivery company with world-class platforms and a robust and expansive lipid nanoparticle (LNP) patent portfolio, today announced the use of its LNP technology in Gritstone bio’s (Nasdaq: GRTS) self-amplifying mRNA (samRNA) vaccine candidate against COVID-19 in its CORAL program. Gritstone was... Read More

High neutralizing antibody (nAb) responses sustained through at least 12 months, highlighting potential for durable clinical protection T cell responses to Spike plus other viral targets observed in all Phase 1 studies, demonstrating broad and potentially variant-proof immune response Over 300 subjects dosed to date across Phase 1 studies; vaccine tolerability appears comparable to approved COVID-19 vaccines Head-to-head... Read More

EMERYVILLE, Calif., Oct. 10, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted three employees nonqualified stock options to purchase an aggregate of 47,000 shares of its common stock with an exercise price of $2.41, which is equal... Read More

EMERYVILLE, Calif., Oct. 04, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced results from all three (3) Phase 1 studies evaluating its self-amplifying mRNA (samRNA) vaccine candidates against COVID-19 (part of the company’s CORAL program) are to be presented at IDWeek 2023, occurring October 11-15, 2023,... Read More

10,000 participant randomized Phase 2b study will evaluate Gritstone’s self-amplifying mRNA (samRNA) vaccine candidate containing Spike plus other viral targets with an approved vaccine against COVID-19 Contract is part of ‘Project NextGen,’ an initiative by the U.S. Department of Health and Human Services to advance a pipeline of new, innovative vaccines and therapeutics providing broader and more durable protection for... Read More

EMERYVILLE, Calif., Sept. 13, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted one employee nonqualified stock options to purchase an aggregate of 14,000 shares of its common stock with an exercise price of $1.71, which is equal... Read More

EMERYVILLE, Calif., Sept. 05, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor conferences: 2023 Wells Fargo Healthcare Conference (1x1s only) Conference Dates: September 6 - 8, 2023 Location: Boston, MA H.C. Wainwright 25th Annual Global... Read More

EMERYVILLE, Calif., Aug. 16, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted two employees nonqualified stock options to purchase an aggregate of 32,500 shares of its common stock with an exercise price of $1.70, which is equal... Read More

Agreement provides nonexclusive access to Genevant’s leading LNP technology for use with Gritstone bio’s self-amplifying RNA technology in wide array of infectious disease vaccines Multi-year, multi-pathogen, option-based deal follows multiple successful prior collaborations between Gritstone and Genevant EMERYVILLE, Calif., VANCOUVER, British Columbia, and BASEL, Switzerland, Aug. 15, 2023 (GLOBE NEWSWIRE) -- Gritstone bio,... Read More

Enrollment completed in Phase 2 portion of Phase 2/3 study evaluating GRANITE (personalized cancer vaccine [PCV]) in first-line metastatic microsatellite-stable colorectal cancer (MSS-CRC); preliminary efficacy data expected in 1Q 2024 Gritstone partnering with Friends of Cancer Research (Friends) on Friends’ ctDNA for Monitoring Treatment Response (ctMoniTR) Project, a collaborative research initiative to inform use of... Read More

EMERYVILLE, Calif., Aug. 07, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the company has joined the ctMoniTR Project , a collaborative research initiative providing foundational evidence to inform future use of change in circulating tumor DNA (ctDNA) as an early indicator of long-term clinical... Read More

EMERYVILLE, Calif., July 17, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted four employees nonqualified stock options to purchase an aggregate of 30,700 shares of its common stock with an exercise price of $2.02, which is equal... Read More

EMERYVILLE, Calif., June 13, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted five employees nonqualified stock options to purchase an aggregate of 83,300 shares of its common stock with an exercise price of $2.06, which is equal... Read More

Potent and durable immunogenicity achieved with low dose self-amplifying mRNA vaccine (samRNA) candidate Immunity boosted for at least 6 months in previously vaccinated-older adults (administration post-primary series of Vaxzevria®, Comirnaty® or Spikevax®) Data underscore the potential of Gritstone’s samRNA candidates to serve as next-generation vaccines against COVID-19 and other infectious diseases EMERYVILLE, Calif.,... Read More

EMERYVILLE, Calif., June 01, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will be participating in the following investor conferences: Goldman Sachs 44th Annual Healthcare Conference (Fireside Chat) Fireside Chat Date and Time: Monday, June 12 at 4:00pm PT Speaker: Andrew Allen, M.D.,... Read More

EMERYVILLE, Calif., May 24, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted two employees nonqualified stock options to purchase an aggregate of 31,000 shares of its common stock with an exercise price of $1.96, which is equal to... Read More

Robust enrollment in Phase 2 portion of randomized Phase 2/3 study of GRANITE (personalized vaccine in first-line metastatic microsatellite-stable colorectal cancer [MSS-CRC]) to date; 71 of 80 patients (initial target) enrolled as of May 10, 2023 Gritstone prioritizing GRANITE; expanding Phase 2 from 80 to 100 patients, enrollment completion expected in 3Q2023, preliminary data on approximately 50 patients expected in... Read More

EMERYVILLE, Calif., May 03, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced it will report its first quarter 2023 financial results and provide a corporate update following market close on Thursday, May 11, 2023. The announcement will be followed by a conference call and audio webcast, which will begin at... Read More

CORAL-CEPI: Primary series samRNA vaccination elicits strong neutralizing antibody (nAb) responses that persist for at least 6 months, including variant cross-reactive nAb, in previously unvaccinated (“vaccine-naïve”) South African subjects Updated CORAL-BOOST: Boost samRNA vaccine elicits robust nAbs that persist for at least 6 months regardless of primary series (adenovirus or mRNA) Data further support the favorable... Read More

Longitudinal analysis of GRANITE recipients (personalized vaccine candidate now in Phase 2/3 for MSS-CRC) demonstrates vaccine-elicited priming and boosting of antigen-specific T cell populations associated with conversion of “cold” to “hot” tumors and molecular responses Advances in EDGE™ models (Gritstone’s AI-driven neoantigen prediction platform) enable best-in-class prediction of class II HLA-presented neoantigens that... Read More

EMERYVILLE, Calif., April 10, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted one employee nonqualified stock options to purchase an aggregate of 20,000 shares of its common stock with an exercise price of $2.76, which is equal... Read More

EMERYVILLE, Calif., April 04, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced multiple presentations at the 33rd European Congress of Clinical Microbiology and Infectious Diseases (ECCMID 2023), taking place April 15-18, 2023 in Copenhagen, Denmark. Both presentations are from the company’s CORAL program,... Read More

EMERYVILLE, Calif., March 15, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced multiple presentations at the 2023 American Association for Cancer Research (AACR) Annual Meeting, taking place April 14-19, 2023 in Orlando, Florida. The poster presentations will address the company’s proprietary neoantigen... Read More

Preliminary data from GRANITE Phase 2/3 study (individualized vaccine for first-line microsatellite-stable colorectal cancer [MSS-CRC]) remain expected in 4Q 2023 Phase 1/2 efficacy signals from “off-the-shelf” vaccine program (SLATE) consistent with those from GRANITE; randomized study of SLATE in patients with newly-diagnosed metastatic cancer to initiate in 2H 2023 Clinical evidence building for differentiation of... Read More

EMERYVILLE, Calif., March 02, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced it will report its fourth quarter and full year 2022 financial results and provide a corporate update following market close on Thursday, March 9, 2023. The announcement will be followed by a conference call and audio webcast,... Read More

EMERYVILLE, Calif., Feb. 27, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the Compensation Committee of the company’s Board of Directors granted three employees nonqualified stock options to purchase an aggregate of 33,000 shares of its common stock with an exercise price of $2.71, which is equal... Read More

EMERYVILLE, Calif., Feb. 27, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that Andrew Allen, M.D., Ph.D., Gritstone’s Co-founder, President and Chief Executive Officer will participate in the “Novel Immuno-Oncology” panel at the Cowen 43 rd Annual Healthcare Conference on March 6, 2023. Panel Details... Read More

EMERYVILLE, Calif., Feb. 14, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that it has entered into a clinical trial agreement with the National Cancer Institute (NCI), an institute of the National Institutes of Health, to evaluate an autologous T cell therapy expressing a T cell receptor targeting... Read More

EMERYVILLE, Calif., Jan. 24, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the company’s Board of Directors granted two employees nonqualified stock options to purchase an aggregate of 28,000 shares of its common stock with an exercise price of $3.67, which is equal to the closing price of... Read More

EMERYVILLE, Calif., Jan. 18, 2023 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that management will participate in the following investor conferences. B. Riley Securities' 3 rd Annual Oncology Conference (Fireside Chat) Date and Time: Thursday, January 19, 2023 at 12:30pm ET Presenter: Andrew Allen, M.D.,... Read More

EMERYVILLE, Calif., Dec. 15, 2022 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that Andrew Allen, M.D., Ph.D., Co-founder, President and Chief Executive Officer, will present at the 41 st Annual J.P. Morgan Healthcare Conference occurring January 9-12, 2023 in San Francisco. The presentation will take place... Read More

EMERYVILLE, Calif., Dec. 15, 2022 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company that aims to develop the world’s most potent vaccines, today announced that the company’s Board of Directors granted five employees nonqualified stock options to purchase an aggregate of 46,950 shares of its common stock with an exercise price of $2.69, which is equal to the closing price of... Read More

Patents support Gritstone’s pioneering work in the application of next-generation samRNA vaccine technology in oncology and infectious disease EMERYVILLE, Calif., Dec. 13, 2022 (GLOBE NEWSWIRE) -- Gritstone bio, Inc. (Nasdaq: GRTS), a clinical-stage biotechnology company working to develop the world’s most potent vaccines, today announced that the United States Patent and Trademark Office (USPTO) recently issued two new... Read More