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

IF YOU ARE AN INVESTOR WHO LOST MONEY ON JASPER THERAPEUTICS, INC. (JSPR), CLICK HERE TO INQUIRE ABOUT POTENTIALLY PURSUING CLAIMS TO RECOVER YOUR LOSS.

What Happened?

On July 7, 2025, Jasper released an update on its Phase 1b/2a clinical study of subcutaneous briquilimab for the treatment of Chronic Spontaneous Urticaria (“CSU”), referred to as the “BEACON Study,” stating that certain results “appear to be confounded by an issue with one drug product lot used in those cohorts, with 10 of the 13 patients dosed with drug from the lot in question,” and that Jasper was “taking steps to ensure that drug product from the lot in question is returned to the Company and that sites have drug product from other lots to continue dosing.” Further, the Company revealed it “has also determined that the drug product lot in question was used to treat participants enrolled in the ETESIAN [Study]. As a result, and in order to focus resources on advancing briquilimab in CSU, the Company is halting the study and pausing development in asthma.” Jasper also disclosed that it would be “halting development in SCID” and “will be implementing a number of other cost cutting measures including a potential restructuring, to extend runway and reduce expenses.”

On this news, Jasper’s stock price fell $3.73, or 55.1%, to close at $3.04 per share on July 7, 2025, thereby injuring investors.

Contact Us To Participate or Learn More:

If you wish to learn more about this action, or if you have any questions concerning this announcement or your rights or interests with respect to these matters, please contact us.

Charles Linehan, Esq.,

Glancy Prongay & Murray LLP,

1925 Century Park East, Suite 2100,

Los Angeles California 90067

Email: shareholders@glancylaw.com

Telephone: 310-201-9150 (Toll-Free: 888-773-9224)

Visit our website at www.glancylaw.com.

Follow us for updates on LinkedIn, Twitter, or Facebook.

Whistleblower Notice

Persons with non-public information regarding Jasper 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 Glancy Prongay & Murray LLP

Glancy Prongay & Murray LLP (“GPM”) is a premier law firm representing investors and consumers in securities litigation and other complex class action litigation. GPM has been consistently ranked in the Top 50 Securities Class Action Settlements by ISS Securities Class Action Services. 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 and relating to nearly all industries and sectors. 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.

This press release may be considered Attorney Advertising in some jurisdictions under the applicable law and ethical rules.

View source version on businesswire.com: https://www.businesswire.com/news/home/20250923570377/en/