The Gross Law Firm notifies investors that a class action has commenced in the United States District Court for the Southern District of California on behalf of shareholders of aTyr Pharma, Inc. who purchased common stock between January 16, 2025 and September 12, 2025.
According to the complaint, defendants provided overwhelmingly positive statements to investors while, at the same time, disseminating false and misleading statements and/or concealing material adverse facts concerning the efficacy of Efzofitimod, particularly, the drug’s capability to allow a patient to completely taper their steroid usage. The truth emerged on September 15, 2025 (pre-market) when aTyr hosted an investor call announcing that the EFZO-FIT study did not meet its primary endpoint. In pertinent part, defendants announced that the study did not meet the primary endpoint in change from baseline in mean daily OSC dose at week 48. Additionally, aTyr announced that the Company’s next step was to engage with the FDA to determine a path forward, given the disappointing topline results. Following this news, the price of aTyr’s common stock declined from a closing market price of $6.03 per share on September 12, 2025 to $1.02 per share on September 15, 2025, a decline of 83.2% in the span of just a single day.
If you wish to choose counsel to represent you and the class, you must apply to be appointed lead plaintiff and be selected by the Court. The lead plaintiff will direct the litigation and participate in important decisions including whether to accept a settlement for the class in the action. The lead plaintiff will be selected from among applicants claiming the largest loss from investment in the respective securities during the class periods. Members of the class will be represented by the lead plaintiff and counsel chosen by the lead plaintiff. No class has yet been certified in the above action. Appointment as Lead Plaintiff is not required to partake in any recovery.
Shareholders have until December 8, 2025 to request that the court appoint them lead plaintiff.
To receive more information, please fill out the form.
