Immuron Ltd 6-K, filed Dec 3, 2025
Immuron Ltd (IMRN)
About this 6-K
Immuron Ltd filed this 6-K on December 3, 2025.
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
For the Month of December 2025
Commission File Number: 001-38104
IMMURON LIMITED
(Name of Registrant)
Level 3, 62 Lygon Street, Carlton South, Victoria, 3053, 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 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, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82-
IMMURON LIMITED
EXPLANATORY NOTE
Immuron Limited (the “Company”) published one announcement (the “Public Notices”) to the Australian Securities Exchange on December 3, 2025 titled:
| 99.1 | U.S. Department of Defense Award & Clinical Trial Update |
A copy of the Public Notice is attached as an exhibit to this report on Form 6-K.
This report on Form 6-K (including the exhibit hereto) shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) and shall not be incorporated by reference into any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing.
1
EXHIBITS
| Exhibit Number |
Description | |
| 99.1 | U.S. Department of Defense Award & Clinical Trial Update |
2
SIGNATURE
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.
| IMMURON LIMITED | ||
| Date: December 3, 2025 | By: | /s/ Phillip Hains |
| Phillip Hains | ||
| Company Secretary | ||
3
Exhibit 99.1
Immuron New U.S. Department of Defense Award & Clinical Trial Update
Highlights:
| ● | New US Department of Defense award to develop two new oral therapeutics targeting Campylobacter and Shigella | |
| ● | Uniformed Services University P2TD clinical study update |
Melbourne, Australia, December 3, 2025: Immuron Limited (ASX: IMC; NASDAQ: IMRN), an Australian based and globally integrated biopharmaceutical company, announces a new research agreement funded by a U.S. Department of Defense sub award with the Naval Medical Research Command (NMRC) and the Walter Reed Army Institute of Research (WRAIR), Silver Spring, MD, USA.
As previously announced on August 16, 2024, the Naval Medical Research Command and the Walter Reed Army Institute of Research, in collaboration with Immuron, are progressing the development of novel vaccines targeting Campylobacter jejuni and Shigella sonnei. Under a recently executed collaborative research agreement with the Henry M. Jackson Foundation, new vaccine preparations against these pathogens have been developed and formulated at the military research institutes and subsequently provided to Immuron. Utilizing its proprietary technology platform, Immuron will produce two hyper-immune bovine colostrum products for pre-clinical evaluation, with the objective of advancing a combined colostrum-based therapeutic specifically designed for the US military.
The company also advises that the Uniformed Services University topline results from its clinical trial evaluating the effectiveness of enterotoxigenic E. coli (ETEC) hyperimmune bovine colostrum in maintaining gut health during deployment and travel are anticipated to be announced at the end of next week. As disclosed on October 31, 2025, the Uniformed Services University completed the P2TD study (NCT04605783), in which IMM-124E—the active ingredient in Travelan®—was delivered in 600 mg powder sachets and administered twice daily in a randomized, placebo-controlled trial.
Infectious diarrhea is the most common illness reported by travelers visiting developing countries and among US troops deployed overseas. Diarrhea morbidity decreases daily performance, affects judgment, decreases morale and declines operational readiness. The first line of treatment for infectious diarrhea is prescription of antibiotics. Unfortunately, in the last decade, several enteric pathogens have an increasing resistance to commonly prescribed antibiotics. In addition, travelers’ diarrhea is now recognized by the medical community to result in post-infectious sequelae, including post-infectious Irritable Bowel Syndrome and several post-infectious autoimmune diseases.
The global burden of diarrheal diseases outweighs any of the more complex diseases seen in gastroenterology clinics. Every year, there are an estimated 1.5 billion episodes of diarrhea worldwide.
These episodes result in the deaths of approximately 2.2 million people, mostly children in developing countries (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2699001/). A preventative treatment that protects against enteric diseases, specifically shigellosis, is a high priority objective for the US Army. Shigella spp are estimated to cause 80 –165 million cases of disease worldwide, resulting in 600,000 deaths annually and is particularly prevalent in both sub-Saharan Africa and South Asia.
This release has been authorised by the directors of Immuron Limited.
- - - END - - -
|
COMPANY CONTACT:
Steven Lydeamore Chief Executive Officer steve@immuron.com |
About Immuron
Immuron Limited (ASX: IMC, NASDAQ: IMRN), is an Australian biopharmaceutical company focused on developing and commercializing orally delivered targeted polyclonal antibodies for the treatment of infectious diseases.
About Travelan®
Travelan® is an orally administered passive immunotherapy that prophylactically reduces the likelihood of contracting travelers’ diarrhea, a digestive tract disorder that is commonly caused by pathogenic bacteria and the toxins they produce. Travelan® is a highly purified tabletized preparation of hyper immune bovine antibodies and other factors, which when taken with meals bind to diarrhea-causing bacteria and prevent colonization and the pathology associated with travelers’ diarrhea. In Australia, Travelan® is a listed medicine on the Australian Register for Therapeutic Goods (AUST L 106709) and is indicated to reduce the risk of Travelers’ Diarrhea, reduce the risk of minor gastro-intestinal disorders and is antimicrobial. In Canada, Travelan® is a licensed natural health product (NPN 80046016) and is indicated to reduce the risk of Travelers’ Diarrhea. In the U.S., Travelan® is sold as a dietary supplement for digestive tract protection.
Travelers’ diarrhea (TD)
TD is generally defined as the passage of ≥ 3 unformed stools per 24 hours plus at least one additional symptom (such as nausea, vomiting, abdominal cramps, fever, blood/mucus in the stools, or fecal urgency) that develop while abroad or within 10 days of returning from any resource-limited destinations (Leung et al., 2006). Diarrhea continues to be the most frequent health problem among travelers to destinations in lower- and middle-income regions (Steffen, 2017). Deployed US military personnel, essentially representing a long-term traveller population, are particularly affected given their population dynamics and the context in which they seek care and treatment (Connor et al., 2012). Diarrhea is the leading infectious disease threat to the overall health and preparedness of deployed US armed forces, with diarrheagenic E. coli, Campylobacter spp., and Shigella spp. among the most commonly reported etiologies (Riddle et al., 2006).
Immuron Platform Technology
Immuron’s proprietary technology is based on polyclonal immunoglobulins (IgG) derived from engineered hyper-immune bovine colostrum. Immuron has the capability of producing highly specific immunoglobulins to any enteric pathogen and our products are orally active. Bovine IgG can withstand the acidic environment of the stomach and is resistant to proteolysis by the digestive enzymes found in the Gastrointestinal (GI) tract. Bovine IgG also possesses this unique ability to remain active in the human GI tract delivering its full benefits directly to the bacteria found there. The underlying nature of Immuron’s platform technology enables the development of medicines across a large range of infectious diseases. The platform can be used to block viruses or bacteria at mucosal surfaces such as the Gastrointestinal tract and neutralize the toxins they produce.
IMM-124E (Travelan®)
IMM-124E was developed using Immuron’s platform technology. IMM-124E is produced from the colostrum of birthing cattle that have been immunised during pregnancy with a vaccine containing the outer antigens of multiple human derived ETEC. A total of 13 ETEC strains are used in the vaccine to produce high levels of antibodies against selected surface antigens from the most common strains of ETEC.
2
The resultant hyperimmune colostrum IMM-124E from ETEC vaccinated cows contains significant levels of polyclonal antibodies specific for ETEC antigens LPS, CFA-I and Flagellin (Sears et al., 2017).
The antibodies produced in IMM-124E have been found to have a stronger binding and neutralizing activity (than the antibodies of unvaccinated cattle) against a wide range of LPS antigens including both the variable O-polysaccharide region and the preserved oligosaccharide core ‘R’ region of LPS from the 13 serotypes used in the ETEC vaccine.
IMM-124E is manufactured into a tablet form referred to as Travelan®.
References
Connor P, Porter CK, Swierczewski B and Riddle MS. Diarrhea during military deployment: current concepts and future directions. Curr Opin Infect Dis. 25(5): 546-54; 2012.
Hutton, M.L., Cunningham, B.A., Mackin, K.E. et al. Bovine antibodies targeting primary and recurrent Clostridium difficile disease are a potent antibiotic alternative. Sci Rep 7, 3665 (2017). https://doi.org/10.1038/s41598-017-03982-5
Leung AK, Robson WL, Davies HD. Travelers’ diarrhea. Adv Ther. Jul-Aug; 23(4): 519-27; 2006
Otto W, Najnigier B, Stelmasiak T and Robins-Browne RM. Randomized control trials using a tablet formulation of hyperimmune bovine colostrum to prevent diarrhea caused by enterotoxigenic Escherichia coli in volunteers Scandinavian Journal of Gastroenterology 46: 862– 868; 2011.
Riddle MS, Sanders JW, Putnam SD, and Tribble DR. Incidence, etiology, and impact of diarrhea among long-term travelers’ (US military and similar populations): A systematic review. American Journal of Tropical Medicine and Hygiene. 74(5): 891-900; 2006.
Sears KT, Tennant SM, Reymann MK, Simon R, Konstantopolos N, Blackwelder WC, Barry EM and Pasetti MF. Bioactive Immune Components of Anti-Diarrheagenic Enterotoxigenic Escherichia coli Hyperimmune Bovine Colostrum products. Clinical and Vaccine Immunology. 24 (8) 1-14; 2017.
Steffen R. Epidemiology of travelers’ diarrhea. J Travel Med. 24(suppl_1): S2-S5; 2017.
For more information visit: https://www.immuron.com.au/ and https://www.travelan.com
Subscribe for Immuron News: Here
FORWARD-LOOKING STATEMENTS:
This press release may contain “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933 and Section 21E of the Securities Exchange Act of 1934, each as amended. Such statements include, but are not limited to, any statements relating to our growth strategy and product development programs and any other statements that are not historical facts. Forward-looking statements are based on management’s current expectations and are subject to risks and uncertainties that could negatively affect our business, operating results, financial condition, and stock value. Factors that could cause actual results to differ materially from those currently anticipated include: risks relating to our growth strategy; our ability to obtain, perform under and maintain financing and strategic agreements and relationships; risks relating to the results of research and development activities; risks relating to the timing of starting and completing clinical trials; uncertainties relating to preclinical and clinical testing; our dependence on third-party suppliers; our ability to attract, integrate and retain key personnel; the early stage of products under development; our need for substantial additional funds; government regulation; patent and intellectual property matters; competition; as well as other risks described in our SEC filings. We expressly disclaim any obligation or undertaking to release publicly any updates or revisions to any forward-looking statements contained herein to reflect any change in our expectations or any changes in events, conditions, or circumstances on which any such statement is based, except as required by law.
3