# EDGAR Filing Document

**Accession Number:** 0001506184
**File Stem:** 0001193125-26-107070
**Filing Date:** 2026-3
**Character Count:** 8149
**Document Hash:** 90b41c1f819186f66c3a87046ea33a6a
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-107070.hdr.sgml**: 20260316

**ACCESSION NUMBER**: 0001193125-26-107070

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20260313

**FILED AS OF DATE**: 20260316

**DATE AS OF CHANGE**: 20260316

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IMMUTEP Ltd
- **CENTRAL INDEX KEY:** 0001506184
- **STANDARD INDUSTRIAL CLASSIFICATION:** PHARMACEUTICAL PREPARATIONS [2834]
- **ORGANIZATION NAME:** 03 Life Sciences
- **EIN:** 000000000
- **STATE OF INCORPORATION:** C3
- **FISCAL YEAR END:** 0630

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35428
- **FILM NUMBER:** 26754298

**BUSINESS ADDRESS:**
- **STREET 1:** LEVEL 32, SUITE 32.07 AUSTRALIA SQUARE
- **STREET 2:** 264 GEORGE STREET
- **CITY:** SYDNEY,
- **STATE:** C3
- **ZIP:** NSW 2000
- **BUSINESS PHONE:** 612 8315 7003

**MAIL ADDRESS:**
- **STREET 1:** LEVEL 32, SUITE 32.07 AUSTRALIA SQUARE
- **STREET 2:** 264 GEORGE STREET
- **CITY:** SYDNEY,
- **STATE:** C3
- **ZIP:** NSW 2000

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Prima BioMed Ltd
- **DATE OF NAME CHANGE:** 20101119

**UNITED STATES** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM 6-K** 

**REPORT OF FOREIGN PRIVATE ISSUER** 

**PURSUANT TO RULE 13a-16 OR 15d-16** 

**UNDER THE SECURITIES EXCHANGE ACT OF 1934** 

**Date as Mar 13, 2026** 

**Commission File Number 001-35428** 

## IMMUTEP LIMITED
**(Exact Name as Specified in its Charter)** 

**N/A** 

**(Translation of Registrant's Name)** 

**Level 32, Australia Square** 

**264 George Street, Sydney** 

**NSW 2000, Australia** 

**(Address of principal executive office)** 

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F ☒ Form 40-F ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ☐

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes ☐ No ☒

If "Yes" is marked, indicated below the file number assigned to the registrant in connection with Rule 12g3-2(b): Not applicable.

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**EXHIBIT INDEX** 

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| | |
|:---|:---|
| **Exhibit** | **Description of Exhibit** |
| 99.1 | [TACTI-004 Phase III Study in First Line NSCLC to be discontinued following Futility Analysis](d115551dex991.htm) |

---

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**SIGNATURES** 

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: Mar 13, 2026

---

| | |
|:---|:---|
| IMMUTEP LIMITED | IMMUTEP LIMITED |
| By: | /s/ Marc Voigt |
| Name: | Marc Voigt |
| Title: | Chief Executive Officer |

---

## Exhibit 99.1

**Exhibit 99.1**![LOGO](g115551dsp01.jpg)

**TACTI-004 Phase III Study in First Line NSCLC to be discontinued following Futility Analysis** 

*Independent Data Monitoring Committee Recommends Discontinuation of Phase III Trial Following Futility Analysis* 

**SYDNEY, AUSTRALIA – March 13, 2026** – Immutep Limited (ASX: IMM; NASDAQ: IMMP) ("Immutep" or "the Company"), today announced that the Independent Data Monitoring Committee (IDMC) for the TACTI-004 Phase III study evaluating eftilagimod alfa ("efti") in patients in 1<sup>st</sup> line non-small cell lung cancer has recommended the discontinuation of the trial following a planned interim futility analysis in accordance with the study protocol.

Based on its review of the available safety and efficacy data, the IDMC recommended that the trial be discontinued for futility.

In response to the IDMC's recommendation, enrolment in the study will be halted and the Company will implement an orderly wind down of the study, including appropriate patient follow up and site close out in accordance with regulatory and ethical obligations.

"We are very disappointed and surprised with the outcome of the futility analysis, in light of efti's performance in every other clinical trial" said Marc Voigt, Chief Executive Officer. "We would like to thank the patients, investigators, and clinical teams who contributed to this important study. We are currently conducting a comprehensive review of the available data to better understand the results and determine the appropriate next steps for the program."

Immutep remains focused on advancing its pipeline of innovative therapies including efti. Following the discontinuation of TACTI-004, Immutep now anticipates its cash runway will be extended well beyond the previously guided timeframe of Q2 CY2027, which was set prior to the trial's cessation. The Company will provide an updated outlook on its revised cash runway and will reassess capital allocation priorities once operational assessments and a full analysis of the study data have been finalised.

**About TACTI-004** 

TACTI-004 (Two ACTive Immunotherapies) is a randomised, double-blind, controlled Phase III study evaluating eftilagimod alfa (efti), a first-in-class MHC Class II agonist, in combination with MSD's (Merck & Co., Inc., Rahway, NJ, USA) anti-PD-1 therapy, KEYTRUDA<sup>®</sup> (pembrolizumab), and chemotherapy as first line therapy for patients with advanced or metastatic non-small cell lung cancer with no EGFR, ALK or ROS1 genomic tumour aberrations. The global trial was to enrol approximately 756 patients regardless of PD-L1 expression and with non-squamous or squamous tumours at over 150 clinical sites in over 25 countries. Patients were being randomised 1:1 to receive either efti in combination with pembrolizumab and chemotherapy in the treatment arm or pembrolizumab in combination with chemotherapy and placebo in the control arm. The study's dual primary endpoints were progression-free survival and overall survival.

![LOGO](g115551dsp01a.jpg)

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**About Eftilagimod Alfa (Efti)** 

Efti is a novel immunotherapy that directly activates antigen-presenting cells or APCs (e.g. dendritic cells, monocytes) via the MHC Class II pathway to fight cancer. As an MHC Class II agonist, its activation of APCs engages the adaptive and innate immune system to initiate a broad anti-cancer immune response. This includes priming and activating cytotoxic T cells as well as generating important co-stimulatory signals & cytokines that further boost the immune system's ability to combat cancer.

Efti is under evaluation for a variety of solid tumours including non-small cell lung cancer (NSCLC), as well as head and neck squamous cell carcinoma (HNSCC), soft tissue sarcoma, and breast cancer. Its favourable safety profile has enabled various combinations like with anti-PD-[L]1 immunotherapy, radiotherapy, and/or chemotherapy. Efti has received Fast Track designation in first line HNSCC and in first line NSCLC from the United States Food and Drug Administration (FDA).

**About Immutep** 

Immutep is a late-stage biotechnology company developing novel immunotherapies for cancer and autoimmune disease*.* The Company is a pioneer in the understanding and advancement of therapeutics related to Lymphocyte Activation Gene-3 (LAG-3), and its diversified product portfolio harnesses LAG-3's ability to stimulate or suppress the immune response. Immutep is dedicated to leveraging its expertise to bring innovative treatment options to patients in need and to maximize value for shareholders. For more information, please visit <u>www.immutep.com</u>.

**Investors/Media:** 

Eleanor Pearson, Sodali & Co.

+61 2 9066 4071; <u>eleanor.pearson@sodali.com</u>

This announcement was authorised for release by the Board of Immutep Limited.

KEYTRUDA<sup>®</sup> is a registered trademark of Merck Sharp & Dohme LLC, a subsidiary of Merck & Co., Inc., Rahway, NJ, USA.

![LOGO](g115551dsp01a.jpg)