INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Sionna Therapeutics, Inc. - SION
INVESTOR ALERT: Pomerantz Law Firm Investigates Claims On Behalf of Investors of Sionna Therapeutics, Inc. - SION
PR Newswire
NEW YORK, Sept. 17, 2026
NEW YORK, Sept. 17, 2026 /PRNewswire/ -- Pomerantz LLP is investigating claims on behalf of investors of Sionna Therapeutics, Inc. ("Sionna" or the "Company") (NASDAQ: SION). Such investors are advised to contact Danielle Peyton at newaction@pomlaw.com or 646-581-9980, ext. 7980.
The investigation concerns whether Sionna and certain of its officers and/or directors have engaged in securities fraud or other unlawful business practices.
[Click here for information about joining the class action]
On August 10, 2026, Sionna issued a press release "report[ing] topline data from two nucleotide binding domain 1 (NBD1) stabilizer programs, the PreciSION CF Phase 2a proof-of-concept (POC) trial of SION-719 when added to Trikafta® (elexacaftor/tezacaftor/ivacaftor) in CF participants, and the Phase 1 trial of SION-451-based proprietary dual combinations in healthy subjects." Sionna disclosed that the PreciSION CF trial failed to achieve its key activity endpoint, which measured the reduction in sweat chloride when SION-719 was administered alongside the standard-of-care treatment Trikafta.
On this news, Sionna's stock price fell $46.54 per share, or 91.18%, to close at $4.50 per share on August 10, 2026.
Pomerantz LLP, with offices in New York, Chicago, Los Angeles, London, Paris, and Tel Aviv, is acknowledged as one of the premier firms in the areas of corporate, securities, and antitrust class litigation. Founded by the late Abraham L. Pomerantz, known as the dean of the class action bar, Pomerantz pioneered the field of securities class actions. Today, more than 85 years later, Pomerantz continues in the tradition he established, fighting for the rights of the victims of securities fraud, breaches of fiduciary duty, and corporate misconduct. The Firm has recovered numerous multimillion-dollar damages awards on behalf of class members. See www.pomlaw.com.
Attorney advertising. Prior results do not guarantee similar outcomes.
CONTACT:
Danielle Peyton
Pomerantz LLP
dpeyton@pomlaw.com
646-581-9980 ext. 7980
SOURCE Pomerantz LLP
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