Robbins LLP is Investigating Allegations that Immutep Limited Misled Investors Regarding the Viability and Efficacy of its Drug Candidate

Robbins LLP informs stockholders that a class action was filed on behalf of all investors who purchased or otherwise acquired Immutep Limited American Depository Receipts (NASDAQ: IMMP) between March 24, 2025 and March 12, 2026. Immutep is an Australian-based biotechnology company focused on developing Lymphocyte Activation Gene-3 (LAG-3) related immunotherapies for cancer and autoimmune diseases. The company’s product pipeline includes TACTI-004, which is in phase III clinical trial evaluating eftilagimod alfa (efti) in patients with advanced lung cancer.

The Allegations:

According to the complaint, during the class period, defendants concealed and misrepresented the status and prospects of the TACTI-004 trial based on continuing positive efficacy and safety readouts of efti's performance in other trials, particularly following positive top-line results from Immutep’s prior TACTI-002 and INSIGHT-003 studies. Further, defendants announced in a Form-K filed with the SEC in January 30, 2026, that the trial was exhibiting “strong operational progress” and the planned interim futility analysis remained “on track for the first quarter of 2026.” In truth, Immutep was aware of or was reckless, based on its access to internal clinical data, analyses, and reports concerning the TACTI-004 trial and its planned interim futility evaluation, that then-existing information materially increased the risk that the study would fail to meet its primary efficacy and/or safety endpoints.

On March 13, 2026, Immutep issued a press release announcing that the Independent Data Monitoring (IDMC) for the TACTI-004 Phase III study recommended that the trial be discontinued following a planned interim futility analysis. Further, based on its review of the available safety and efficacy data, the IDMC recommended that the trial be discontinued for futility. On this news, the price of Immutep’s ADRs declined from a closing market price of $2.76 per share on March 12, 2026, to $0.48 per share on March 13, 2026, a decline of about 83%.

What Now: You may be eligible to participate in the class action against Immutep Limited. Shareholders who wish to serve as lead plaintiff for the class should contact Robbins LLP. The lead plaintiff is a representative party who acts on behalf of other class members in directing the litigation.  You do not have to participate in the case to be eligible for a recovery. If you choose to take no action, you can remain an absent class member.

All representation is on a contingency fee basis. Shareholders pay no fees or expenses.