MaaT-013

Oral presentation highlights updated data in Early Access Program (EAP) for 173 patients with acute Graft-vs-Host Disease (aGvHD) treated with Xervyteg® Independent dataset from EAP reinforces the findings from the pivotal ARES trial and has also been included in the EMA Marketing Authorization Application submitted on June 2nd, 2025 EAP for Xervyteg® in aGvHD is currently running in 11 countries* providing expanded access to patients with high unmet medical needs Lyon, France, June 13, 2025 – 7:30am CET – MaaT Pharma (EURONEXT: MAAT – the “Company”), a clinical-stage biotechnology company and a leader in the development of Microbiome Ecosystem TherapiesTM (MET) dedicated to enhancing survival for patients with cancer through immune modulation, today announced that Professor Mohamad Mohty, Professor of Hematology and Head of the Hematology and Cellular Therapy Department at Saint-Antoine Hospital and Sorbonne University, will present updated data for Xervyteg® (MaaT013) in treating acute Graft-versus-Host Disease (aGvHD) under the Early Access Program (EAP) at the European Hematology Association (EHA) Annual Congress 2025. This independent EAP dataset further supports the efficacy and safety profile of Xervyteg® previously shown in the pivotal ARES trial. It also confirms the breakthrough potential of Xervyteg® for aGvHD patients with limited treatment options and it also serves as supportive data within the Marketing Authorization Application (MAA) recently submitted to the European Medicines Agency (EMA). Key highlights: aGvHD is a major cause of morbidity and mortality following allogeneic hematopoietic stem cell transplantation. The patients (N=173) treated in EAP previously failed 1 to 6 aGvHD systemic treatment lines and most had grade III (49%) or IV (38%) aGvHD. The real-world data presented underscores the favorable safety profile of Xervyteg® the strong and durable responses, translating into increased overall survival: Gastrointestinal Overall Response Rate (GI-ORR) of 53% at D28, with Complete Response (CR) observed in 30% of patients; all-organ Overall Response Rate (ORR) was 50% with 26% CR. Response is maintained at D56 indicating a long-term disease control with a GI-ORR of 47% and an ORR considering all organs of 46%. Overall Survival (OS) in all patients was 55% at 6 months, 48% at 12 months, 44% at 24 months. Xervyteg® displayed a good overall safety profile in the EAP population. OS was significantly higher in patients who responded to Xervyteg® (MaaT013) compared to non-responders (69% versus 25% at 12 months, and 61% versus 25% at 24 months). Median survival in all patients was 312 days. In responder patients, median survival was 834 days vs 69 days in non-responders. A subset of patients (n=70) failing both steroid resistant (SR) and ruxolitinib resistant (RR) and thus resembling the cohort enrolled in the pivotal Phase 3 ARES trial (NCT04769895), exhibited a significant and consistent efficacy profile: At both Day 28 and Day 56, Xervyteg® demonstrated durable efficacy in SR/RR aGvHD patients, with GI-ORRs of 57% and Complete Response (CR) observed in 44% of patients at D28 and 51% at D56. All-organs ORR was 54% with 41% CR at D28, and 55% with 48% CR at D56. OS was 55% at 6 months, 51% at 12 months, 40% at 24 months. OS was significantly higher in patients who responded to Xervyteg® compared to non-responders (77% versus 14% at 12 months, and 59% versus 14% at 24 months). Median survival in all 70 patients was 445 days. In responder patients, median survival was 834 days vs 53 days in non-responders. The complete data may be found here. “The consistency between the real-world Early Access Program data and our pivotal ARES trial underscores Xervyteg®’s clinical benefit for patients with severe, treatment-resistant aGvHD,” said Dr. Gianfranco Pittari, Chief Medical Officer at MaaT Pharma. “This is particularly meaningful for clinicians and patients, as it confirms the potential of microbiome therapies to deliver long-term survival benefits in a population with historically poor outcomes.” In comparison, historical data from Abedin et al. 2021 demonstrated that in a similar population of patients, i.e. third-line aGvHD patients receiving additional treatment after ruxolitinib failure, the median survival was only 28 days. “Among patients who responded by Day 28, the majority achieved a complete resolution of aGvHD symptoms — a strong predictor of sustained disease control over time. The overall safety profile is favorable in this high-risk patient population,” outlines Professor Mohty, Professor of Hematology and Head of the Hematology and Cellular Therapy Department at Saint-Antoine Hospital and Sorbonne University. Details of the Oral Presentation: Title: Pooled Fecal Allogeneic Microbiotherapy for Refractory Gastrointestinal Acute Graft-Versus-Host Disease: Results from the Early Access Program in Europe Abstract number: S260 Presenting Author: Mohamad Mohty, Professor of Hematology and Head of the Hematology and Cellular Therapy Department at Saint-Antoine Hospital and Sorbonne University Session title: s424 Stem cell transplantation – Session 2 Date & Time: 13/06/2025 (17:00 – 17:15 CEST) – Brown Hall 3 MaaT Pharma also presented a poster on the design of its ongoing Phase 2b trial (PHOEBUS) evaluating MaaT033 to enhance overall survival in allo-HSCT. This international, multi-center trial (NCT05762211) is the largest randomized controlled study to date of a microbiome-based therapy in oncology, enrolling up to 387 patients across 60 sites. * France, Austria, Belgium, Canada, Germany, Italy, Lebanon, Spain, Sweden, Switzerland & USA About MaaT Pharma MaaT Pharma is a leading, late-stage clinical company focused on developing innovative gut microbiome-driven therapies to modulate the immune system and enhance cancer patient survival. Supported by a talented team committed to making a difference for patients worldwide, the Company was founded in 2014 and is based in Lyon, France. As a pioneer, MaaT Pharma is leading the way in bringing the first microbiome-driven immunomodulator in oncology. Using its proprietary pooling and co-cultivation technologies, MaaT Pharma develops high diversity, standardized drug candidates, aiming at extending life of cancer patients. MaaT Pharma has been listed on Euronext Paris (ticker: MAAT) since 2021. Forward-Looking statements All statements other than statements of historical fact included in this press release about future events are subject to (i) change without notice and (ii) factors beyond the Company’s control. These statements may include, without limitation, any statements preceded by, followed by, or including words such as “target,” “believe,” “expect,” “aim”, “intend,” “may,” “anticipate,” “estimate,” “plan,” “project,” “will,” “can have,” “likely,” “should,” “would,” “could” and other words and terms of similar meaning or the negative thereof. Forward-looking statements are subject to inherent risks and uncertainties beyond the Company’s control that could cause the Company’s actual results or performance to be materially different from the expected results or performance expressed or implied by such forward-looking statements.

Key companies, such as CSL Behring, Equillium, Biocon, and medac, are advancing their assets through late-stage graft versus host disease clinical trials, driving innovation in the graft versus host disease market and creating significant growth opportunities. LAS VEGAS, June 12, 2025 /PRNewswire/ -- Graft versus host disease (GvHD) is an immune-driven disorder caused by a complex interplay between the donor's and recipient's adaptive immune systems. It typically manifests in two main forms: acute (aGvHD) and chronic (cGvHD). As per DelveInsight's analysis, approximately 60,000 allogeneic transplants and around 55,000 GvHD cases occurred in the 7MM in 2024. These numbers are projected to grow at a notable CAGR over the forecast period from 2025 to 2034. Corticosteroids like prednisone and methylprednisolone are the primary first-line treatments, often combined with other immunosuppressants. Mild GcHD is managed with topical steroids, while systemic cases require stronger immunosuppressive therapy. Several treatments for GvHD have received FDA approval in the US, including ORENCIA (abatacept), JAKAFI/JAKAVI (ruxolitinib), IMBRUVICA (ibrutinib), and REZUROCK (belumosudil), among others. In the upcoming GvHD treatment market landscape, there are a plethora of companies investigating agents in various stages of development. To know more about the graft versus host disease clinical trials market, visit @ Graft versus Host Disease Market DelveInsight estimates that the market size for GvHD is expected to grow from USD 1.4 billion in 2024 with a significant CAGR of 8.2% by 2034. This anticipated growth is driven by advancements in treatment options, greater healthcare access, and a rising prevalence of the condition, which together foster higher demand for innovative and effective therapies. The current pipeline for graft versus host disease includes a range of drugs with diverse mechanisms of action (MoA). CSL964 (Alpha 1 Antitrypsin), EQ001 (Itolizumab; Bmab600), MaaT013, and MC0518 are the most promising drugs that are in the late-stage of development for GvHD treatment. Ongoing research and current trials have the potential to change the GvHD market. Keen to know how the GvHD market will evolve by 2034? Find out @ Graft versus Host Disease (GvHD) Market Forecast Apart from this, several GvHD drugs currently in the early stages of development include RLS-0071 by ReAlta Life Sciences, Vimseltinib by Deciphera Pharmaceuticals, ASC-930 by ASC Therapeutics, RGI-2001 by REGiMMUNE, CYP-001 by Cynata Therapeutics, arsenic trioxide (As2O3) by BioSenic (Medsenic), TRX103 (Tregs) by Tr1X, TCD601 (Siplizumab) by ITB-MED, F-652 by Evive Biotech, RHPRG4 by Lubris BioPharma, XBI302 by Xbiome, RG6287 by Genentech, ALTB-168 by AltruBio, and SER-155 by Seres Therapeutics. Now, let's examine the late-stage pipeline therapies under investigation for GvHD treatment CSL Behring's ZEMAIRA CSL964 Alpha-1 Antitrypsin, an Alpha1-Proteinase Inhibitor (A1-PI) developed by CSL Behring, is being studied for the treatment of steroid-refractory acute graft-versus-host disease (aGvHD) and for the prevention of aGvHD in high-risk patients undergoing allogeneic hematopoietic stem cell transplantation (HSCT). It is currently in Phase III clinical trials for the treatment of steroid-refractory aGvHD and is also being evaluated in Phase II/III trials for its potential in preventing aGvHD. Equillium/Biocon's EQ001 EQ001 (Itolizumab; Bmab600) is a first-in-class immune-modulating antibody that targets CD6 to suppress the activation and migration of harmful T cells responsible for releasing pro-inflammatory cytokines in autoimmune and inflammatory conditions such as GvHD, moderate-to-severe uncontrolled asthma, and lupus nephritis. By acting on the CD6-ALCAM signaling pathway, Itolizumab selectively inhibits pathogenic effector T cells (Teffs) while preserving regulatory T cells (Tregs), which are essential for immune system balance. Currently, EQ001 is undergoing a Phase III clinical trial in combination with corticosteroids as a first-line therapy for GvHD.In March 2025, Equillium reported topline Phase III EQUATOR trial results for itolizumab in first-line aGVHD. While the study did not show a meaningful difference in CR or ORR at Day 29 versus placebo, itolizumab demonstrated statistically significant and clinically meaningful improvements in longer-term outcomes, including CR at Day 99, duration of response, and failure-free survival. In April 2025, the FDA declined to grant Breakthrough Therapy designation or support an Accelerated Approval pathway for itolizumab, citing limitations in the EQUATOR study data. Discover which therapies are expected to grab major GvHD market share @ Graft versus Host Disease Treatment Market MaaT Pharma's MaaT013 MaaT013 is a standardized, donor-derived microbiome ecosystem therapy characterized by high richness and diversity. It includes BUTYCORE, a consortium of bacterial species known for producing anti-inflammatory short-chain fatty acids. The therapy is designed to reestablish the balance between the patient's gut microbiome and immune system, aiming to enhance immune tolerance and responsiveness, thereby addressing steroid-resistant, gastrointestinal-dominant aGvHD. MaaT013 has been granted Orphan Drug Designation (ODD) by both the US FDA and the EMA. In December 2024, MaaT Pharma shared encouraging updated results from its Early Access Program at the ASH 2024 Annual Meeting. Subsequently, in January 2025, the company announced promising topline findings from the Phase III ARES trial, where MaaT013 achieved a 62% overall gastrointestinal response rate by Day 28, marking a significant advancement as a third-line treatment for GI-aGvHD. medac's MC0518 MC0518 is an investigational mesenchymal stromal cell (MSC) therapy developed by Medac GmbH, currently undergoing clinical trials for the treatment of steroid-refractory acute graft-versus-host disease (SR-aGvHD) following allogeneic hematopoietic stem cell transplantation. This therapy leverages the immunomodulatory properties of MSCs to mitigate the severe inflammatory responses characteristic of SR-aGvHD, a condition where the donor's immune cells attack the recipient's tissues despite steroid treatment. The IDUNN trial, a pivotal Phase III study, is evaluating the efficacy and safety of MC0518 compared to the best available therapy (BAT) in pediatric and adolescent patients. The primary endpoint is the overall response rate (ORR) at Day 28, with secondary objectives including overall survival (OS) up to 24 months and freedom from treatment failure (FFTF) within six months. Preclinical assessments have demonstrated that MC0518 is well-tolerated, with no evidence of tumorigenicity or significant adverse effects in animal models. Discover more about drugs for GvHD in development @ Graft versus Host Disease Clinical Trials The anticipated launch of these emerging therapies for GvHD are poised to transform the market landscape in the coming years. As these cutting-edge therapies continue to mature and gain regulatory approval, they are expected to reshape the GvHD market landscape, offering new standards of care and unlocking opportunities for medical innovation and economic growth. DelveInsight's latest published market report, titled as Graft versus Host Disease Market Insight, Epidemiology, and Market Forecast – 2034 , will help you to discover which market leader is going to capture the largest market share. The report provides comprehensive insights into the GvHD country-specific treatment guidelines, patient pool analysis, and epidemiology forecast to help understand the key opportunities and assess the market's underlying potential. The GvHD market report offers epidemiological analysis for the study period 2020–2034 in the 7MM, segmented into: Total allogenic transplant cases Total Graft Versus Host Disease Cases Type-specific Cases of Graft Versus Host Disease Acute Graft Versus Host Disease Cases by Grading Acute Graft Versus Host Disease Cases by Organ Involvement Chronic Graft Versus Host Disease Cases by Grading Chronic Graft Versus Host Disease Cases by Organ Involvement Total Treated Cases of Graft Versus Host Disease Mortality Adjusted Treated Cases of Graft Versus Host Disease The report provides an edge while developing business strategies by understanding trends shaping and driving the 7MM GvHD market. Highlights include: 10-year Forecast 7MM Analysis Epidemiology-based Market Forecasting Historical and Forecasted Market Analysis upto 2034 Emerging Drug Market Uptake Peak Sales Analysis Key Cross Competition Analysis Industry Expert's Opinion Access and Reimbursement Download this GvHD market report to assess the epidemiology forecasts, understand the patient journeys, know KOLs' opinions about the upcoming treatment paradigms, and determine the factors contributing to the shift in the GvHD market. Also, stay abreast of the mitigating factors to improve your market position in the GvHD therapeutic space. Related Reports Graft versus Host Disease Epidemiology Forecast Graft versus Host Disease Epidemiology Forecast – 2034 report delivers an in-depth understanding of the disease, historical and forecasted GvHD epidemiology in the 7MM, i.e., the United States, EU4 (Germany, Spain, Italy, France) and the United Kingdom, and Japan. Graft versus Host Disease Pipeline Graft versus Host Disease Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key GvHD companies, including Abbisko Therapeutics, Equillium, Theriva Biologics, Seres Therapeutics, CytoMed Therapeutics, Beijing Tide Pharmaceutical, CTI BioPharma, ViGenCell, Lipella Pharmaceuticals, Cellestia Biotech, Seres Therapeutics, Jiangsu HengRui Medicine Therapeutics, Genentech, AltruBio, Orca Bio, GSK, Amgen , among others. Acute Graft versus Host Disease Pipeline Acute Graft versus Host Disease Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key acute GvHD companies, including MaaT Pharma, Medac, CSL Behring, Humanigen, Ironwood Pharmaceuticals, ReAlta Life Sciences, Roche, Incyte Corporation , among others. Ocular Graft versus Host Disease Pipeline Ocular Graft versus Host Disease Pipeline Insight – 2025 report provides comprehensive insights about the pipeline landscape, pipeline drug profiles, including clinical and non-clinical stage products, and the key ocular GvHD companies, including Cambium Medical Technologies, Glia LLC., Ocular Discovery, Selagine , among others. About DelveInsight DelveInsight is a leading Business Consultant and Market Research firm focused exclusively on life sciences. It supports pharma companies by providing comprehensive end-to-end solutions to improve their performance. Get hassle-free access to all the healthcare and pharma market research reports through our subscription-based platform PharmDelve . Contact Us Shruti Thakur [email protected] +14699457679 Logo: SOURCE DelveInsight Business Research, LLP WANT YOUR COMPANY'S NEWS FEATURED ON PRNEWSWIRE.COM? 440k+ Newsrooms & Influencers 9k+ Digital Media Outlets 270k+ Journalists Opted In GET STARTED