Glancy Prongay & Murray LLP (“GPM”), a leading national shareholder rights law firm, today announced that it has commenced an investigation on behalf of Gritstone bio, Inc. (“Gritstone” or the “Company”) (NASDAQ: GRTS) investors concerning the Company’s possible violations of the federal securities laws.

If you suffered a loss on your Gritstone investments or would like to inquire about potentially pursuing claims to recover your loss under the federal securities laws, you can submit your contact information at www.glancylaw.com/cases/Gritstone-bio-Inc/. You can also contact Charles H. Linehan, of GPM at 310-201-9150, Toll-Free at 888-773-9224, or via email at shareholders@glancylaw.com to learn more about your rights.

On February 12, 2024, Gritstone disclosed that it would be delaying the launch of its COVID-19 vaccine study (the “Phase 2b CORAL Study”) from the first quarter of 2024 to Fall 2024 to “allow use of fully GMP-grade raw materials in the vaccine, which is expected to increase the regulatory utility of the trial.”

Then, on February 29, 2024, Gritstone announced that it was reducing approximated 40% of its workforce, stating that “[t]he 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 beginning in 1Q 2024, associated with the initiation of the study.”

On this news, Gritstone’s stock price fell $0.78, or 27.9%, to close at $2.02 per share on March 1, 2024, thereby injuring investors.

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Whistleblower Notice: Persons with non-public information regarding Gritstone should consider their options to aid the investigation or take advantage of the SEC Whistleblower Program. Under the program, whistleblowers who provide original information may receive rewards totaling up to 30 percent of any successful recovery made by the SEC. For more information, call Charles H. Linehan at 310-201-9150 or 888-773-9224 or email shareholders@glancylaw.com.

About GPM

Glancy Prongay & Murray LLP is a premier law firm representing investors and consumers in securities litigation and other complex class action litigation. ISS Securities Class Action Services has consistently ranked GPM in its annual SCAS Top 50 Report. In 2018, GPM was ranked a top five law firm in number of securities class action settlements, and a top six law firm for total dollar size of settlements. With four offices across the country, GPM’s nearly 40 attorneys have won groundbreaking rulings and recovered billions of dollars for investors and consumers in securities, antitrust, consumer, and employment class actions. GPM’s lawyers have handled cases covering a wide spectrum of corporate misconduct including cases involving financial restatements, internal control weaknesses, earnings management, fraudulent earnings guidance and forward looking statements, auditor misconduct, insider trading, violations of FDA regulations, actions resulting in FDA and DOJ investigations, and many other forms of corporate misconduct. GPM’s attorneys have worked on securities cases relating to nearly all industries and sectors in the financial markets, including, energy, consumer discretionary, consumer staples, real estate and REITs, financial, insurance, information technology, health care, biotech, cryptocurrency, medical devices, and many more. GPM’s past successes have been widely covered by leading news and industry publications such as The Wall Street Journal, The Financial Times, Bloomberg Businessweek, Reuters, the Associated Press, Barron’s, Investor’s Business Daily, Forbes, and Money.

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