The Schall Law Firm, a national shareholder rights litigation firm, announces that it is investigating claims on behalf of investors of REGENXBIO Inc. (“Regenxbio” or “the Company”) (NASDAQ: RGNX) for violations of the securities laws.

The investigation focuses on whether the Company issued false and/or misleading statements and/or failed to disclose information pertinent to investors. Regenxbio issued a press release on January 28, 2026, announcing that the FDA “placed a clinical hold on its investigational gene therapy, RGX-111, for the treatment of MPS I, also known as Hurler syndrome, following preliminary analysis of a single case of neoplasm (intraventricular CNS tumor) in a participant treated in its Phase I/II study." The Company added, "the FDA also placed a clinical hold on RGX-121, for the treatment of MPS II, also known as Hunter Syndrome, citing the similarities in products, study populations, and shared risk between the clinical studies." Based on this news, shares of Regenxbio fell by 17.9% on the same day.

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We also encourage you to contact Brian Schall of the Schall Law Firm, 2049 Century Park East, Suite 2460, Los Angeles, CA 90067, at 310-301-3335, to discuss your rights free of charge. You can also reach us through the firm's website at www.schallfirm.com, or by email at bschall@schallfirm.com.

The Schall Law Firm represents investors around the world and specializes in securities class action lawsuits and shareholder rights litigation.

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