Inmune Bio, Inc.

Current report

INmune Bio is a clinical-stage biotechnology company dedicated to developing and commercializing a pipeline of product candidates designed to reprogram the innate immune system. Our mission is to address a broad range of diseases where chronic inflammation and immune dysfunction are primary drivers of pathology.

Current report

Lead Program: CORDStrom™ for RDEB Our primary focus is the treatment of Recessive Dystrophic Epidermolysis Bullosa (“RDEB”) using CORDStrom, our proprietary, pooled, human umbilical cord-derived mesenchymal stromal cell platform. RDEB is a devastating pediatric orphan disease caused by mutations in theCOL7A1 gene. This genetic deficiency leads to systemic complications, including highly debilitating skin blistering, chronic non-healing wounds, dysphagia, and failure to thrive. Over time, the chronic inflammatory environment associated with RDEB often progresses to fatal squamous cell carcinoma. RDEB is a systemic disease with no approved systemic treatments. The only approved products to date are topical and do not address the systemic issues of the disease, which is the focus of CORDStrom.

Current report

CORDStrom has recently completed a pivotal, blinded, randomized cross-over trial. Based on these data, the Company is transitioning toward regulatory submission and commercialization. We intend to file a Marketing Authorization Application (“MAA”) in the United Kingdom and the European Union, followed by a Biologics License Application (“BLA”) with the U.S. Food and Drug Administration (“FDA”) targeted for 2026.

Current report

Neuroinflammation and Oncology Pipelines In addition to our lead rare disease program, the Company has two other clinical-stage platforms:

Current report

By targeting the innate immune system across these distinct therapeutic areas, INmune Bio aims to deliver disease-modifying treatments for patients with high unmet medical needs.

Current report

Amendment to Anthony Nolan License Agreement

Current report

On April 29, 2026, the Company entered into an amended and restated material transfer and license agreement with Anthony Nolan, a UK-based organization, which amends and restates a prior agreement originally entered into in 2017 by the Company’s wholly owned subsidiary. In connection with the amended agreement, the Company became a direct party and agreed to be jointly and severally liable for certain payment obligations thereunder. The amended agreement expands the Company’s collaboration with Anthony Nolan and is intended to secure a long-term supply of umbilical cord tissue to support the development of CORDStrom, which the Company expects will be the initial application of such materials, with potential use in additional product candidates in the future.

Current report

Under the amended agreement, the Company has obtained exclusive rights, with the ability to sublicense, to use specified donor materials for research, development and commercialization purposes. The Company is obligated to pay per-sample processing fees and, upon commercialization, royalties on net sales, each subject to certain adjustments and caps, and such fees may be subject to periodic increases tied to inflation indices. The agreement continues until terminated in accordance with its terms or for a period extending beyond the first commercial sale of applicable products.

Current report

The Company does not expect the amended agreement to have a material impact on its near-term results of operations or liquidity; however, it may result in future payment obligations and become material in the event of successful development and commercialization of product candidates utilizing such materials. The Company believes this agreement is consistent with its strategy to advance its product candidates through collaborations, strategic relationships and licensing arrangements.

Current report

During the three months ended March 31, 2025 the Company recognized $50,000 of revenues from a license agreement.

Current report

Research and Development

Current report

General and administrative expenses were approximately $2.2 million and $2.3 million during the three months ended March 31, 2026 and 2025, respectively. This decrease is due to the Company incurring lower stock-based compensation expense.

Current report

During the three months ended March 31, 2026 and March 31, 2025, the Company recorded $0.4 million and $0.2 million of other income, respectively. The increase in other income is mainly due to a gain on the settlement of a vendor payable during March 2026.

Current report

Critical Accounting Policies and Estimates

Previous report

Our objective is to develop and commercialize our product candidates to treat diseases where inflammation and immunology cause a dysfunctional immune system contributing to disease. Immune dysfunction can occur for a variety of reasons including genetics, lifestyle, and other factors. However, age plays a significant role in the development of immune dysfunction. Immune dysfunction can be seen in cancer where Natural Killer (“NK”) cells are impaired and facilitate a tumor’s evasion of the immune system and subsequent disease progression. Chronic inflammation is implicated in various diseases, where it impairs the immune system. Our primary focus continues to be treatment of Alzheimer’s Disease (“AD”) with XPro1595 (“XPro™ and DN-TNF) and treatment of recessive dystrophic epidermolysis bullosa (“RDEB”) with CORDStrom, a proprietary, pooled, human umbilical cord mesenchymal stromal cell platform. RDEB is a pediatric orphan disease caused by mutations in the COL7A1 gene which results in highly debilitating skin blistering, dysphagia and failure to thrive with chronic wound problems that often result in fatal squamous cell carcinoma.

Previous report

XPro for AD has completed Phase I and Phase II trials with enrollment of patients at clinical sites in the United Kingdom, EU, Australia and Canada. The INKmune program has nearly completed an open label Phase II trial in metastatic castrate resistant prostate cancer (“mCRPC”). CORDStrom for the treatment of children with RDEB has completed a pivotal blinded randomized cross-over trial. The data will be submitted for marketing authorization by filing a Marketing Authorization Application (MAA) in the United Kingdom followed by a Biologics License Application (“BLA”) with the FDA in the US which is anticipated in 2026.

Previous report

We believe our XPro™ platform can be used as a CNS (“central nervous system”) therapy to target glial activation to prevent progression of AD along with other inflammatory diseases. The primary focus of the Company’s development efforts for XPro is AD. In each case, we believe neutralizing sTNF is a cornerstone to the treatment of neuroinflammation and immune dysfunction in these diseases.

Previous report

We believe the DN-TNF platform can be used to treat selected neurodegenerative diseases by reducing neuroinflammation without immunosuppression. The Company believes the core pathology of cognitive decline is a combination of neurodegeneration and synaptic dysfunction. Neurodegeneration is nerve cell death that may include demyelination. Synaptic dysfunction means the connections between nerve cells cease to work efficiently and may decrease in number. The combination of neurodegeneration and synaptic dysfunction causes cognitive decline and behavioral changes associated with AD. XPro completed a Phase I trial treating patients with Alzheimer’s disease that was partially funded by a Part-the-Clouds Award from the Alzheimer’s Association. We believe XPro targets activated microglia and astrocytes of the brain that produce sTNF that promotes nerve cell loss, synaptic dysfunction and prevents myelin repair - key elements in the development of dementia. In animal models, elimination of sTNF prevents nerve cell dysfunction, reverses synaptic pruning and promotes myelin repair. The Phase I trial in patients with biomarkers of inflammation with AD has been completed. The open label, dose escalation trial was designed to demonstrate that XPro can safely decrease neuroinflammation in patients with AD and biomarkers of inflammation (ADi). The goal of the Phase 1 trial was to demonstrate safety in the target population (patients with AD), demonstrate target engagement by showing XPro got into the brain in therapeutically relevant concentrations and reduced neuroinflammation) and identify the best dose for phase 2. XPro got into the brain (Figure 1a) and dose dependently decreased biomarker of neuroinflammation in the CSF (Figure 1b) with patients treated with the highest dose (1mg/kg/week dose) having the greatest reduction in neuroinflammation. A broad analysis of proteomic changes following treatment of XPro revealed significant changes in CSF proteins related to CNS neuronal function, immune/inflammatory response, Cytoskeletal, metabolic processes, and dendritic spine morphogenesis and synaptic plasticity. Of note, XPro reduced neuronal injury markers Visinin-like protein-1 (91%) and Neurofilament light (84%), improved measures of synaptic function as evinced by a 222% increase in Contactin 2 and a 56% decrease neurogranin. Finally, XPro significantly reduced CSL levels of p-Tau217 (43%) and pTau181 (2%) after 3 months of therapy (Figure 1c).

Previous report

Figure 1: (A) XPro gets into the brain at therapeutically relevant concentrations. XPro neutralizes 99.9% of soluble TNF when drug levels exceed two logs. (B) XPro dose dependently reduces CSF inflammation in the brain. CSF composite – a composite score of change of all cytokines measured in the OLINK Target 48 Cytokine panel. (C) XPro (at 1 mg/kg dose) reduces CSF pTau217 and pTau181 as measure by proteomics.

Previous report

The Phase II study, also known as AD-02 and MINDFuL, was a multicenter, randomized, double-blind, placebo-controlled clinical trial evaluating the safety, tolerability, and efficacy of XPro1595 in individuals with early Alzheimer’s disease with biomarkers of inflammation (ADi). The primary goal of AD02 was to determine if XPro could affect cognition following 6 months of treatment. Participants with a diagnosis of early AD (mild cognitive impairment or mild AD) were randomized in a 2:1 (XPro:Placebo) ratio to receive either 1.0 mg/kg of XPro1595 or placebo via weekly subcutaneous injections for 6 months. An enrichment strategy mirroring to the successful strategy used in the Phase I trial was used to align the mechanism of the drug with the patients AD pathology. Eligibility required the presence of at least one inflammatory biomarker—either high-sensitivity C-reactive protein (hsCRP > 1.5 mg/L), erythrocyte sedimentation rate (ESR > 10 mm/h), hemoglobin A1c (HbA1c > 6.0% DCCT), or at least one APOE4 allele. The primary endpoint was the Early and Mild Alzheimer’s Cognitive Composite (EMACC), with secondary endpoints of Clinical Dementia Rating Scale – Sum of Boxes (CDR-SB), Everyday Cognition Scale (E-Cog), Neuropsychiatric Inventory (NPI-12), ADCS-ADL, and biomarkers such as pTau-217 and GFAP. MRI-based neuroinflammation and brain volumetrics are also evaluated. The AD program had sites in Australia, Canada, the United Kingdom, France, Germany, Spain, Czech Republic and Slovakia.

Previous report

Full enrollment in the Phase II AD trial occurred in late 2024 with 208 patients enrolled and top-line data was received during June 2025. In the Phase 2 MINDFuL trial of XPro™ in patients with early Alzheimer’s Disease (AD) with biomarkers of inflammation, the modified intent-to-treat (mITT) population (n=200) did not meet the primary and key secondary endpoints (figure 1). Efficacy, Demographics and Safety data are shown below.

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Figure 1: Phase 2 Study Results – mITT population Primary and Key Secondary Endpoints, Change From Baseline

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Figure 1: As these graphs depict, the primary and secondary endpoints in this trial were not met as no decline in the placebo groups were observed. A trend was observed in NPI that favored XPro1595 over placebo. For reference, A higher EMACC score =better, A lower CDR and NPI score is better. EMACC: LS Mean Diff (SE): -0.018 (0.0414), 90% CI: -0.0860, 0.0509, p-value: 0.672. CDR-SB: LS Mean Diff (SE): -0.11 (0.185), 90% CI: -0.417, 0.195, p-value: 0.5491. NPI: LS Mean Diff (SE): -0.9 (0.78), 90% CI: -2.18, 0.39, p-value: 0.2499

Previous report

Prespecified subgroups analyses suggested a signal that favored XPro in a predetermined population of patients that were both amyloid positive and had a higher burden of inflammation defined by 2 or more biomarkers of inflammation (from hereon referred to as enriched group). As shown in figure 2, the mITT placebo group did not decline whereas patients in the enriched group did decline. Decline in the placebo group is required to test the ability of a treatment to prevent or slow decline.

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Figure 2: Phase 2 Study Results – Placebo group decline in the mITT and enriched population

Previous report

Figure 2: Placebo patients in the mITT did not show decline on the EMACC over the 24 week study. In the enriched group, placebo patients did decline over 24 weeks.

Previous report

To evaluate a subgroup after missing the primary endpoint, we used effect size as the primary metric due to the smaller sample size (n=100). Effect size, measured by Cohen’s D, is well-suited for small samples and allows comparisons across different measures (e.g., cognitive tests and biomarkers). Unlike p-values, which indicate the likelihood of results being due to chance, effect size reflects clinical relevance and is commonly used for signal detection in Phase 2 studies.

Previous report

We defined a promising signal as a minimum effect size of 0.2, where XPro outperformed placebo on multiple endpoints aligned with our hypothesis and the drug’s mechanism of action. Results must also be appropriate for the trial’s parameters, meaning the observed effects should align with the trial’s duration and endpoints. For example, if a clinical measure typically requires a longer time to show meaningful change than the trial’s 6-month timeframe, an observed effect on that endpoint would not be considered supportive. Signal detection was based on the effect size difference in LS mean change from baseline (MMRM model) between XPro and placebo at 6 months, ensuring results were meaningful, relevant, and appropriate for the trial’s design and objectives.

Previous report

Using this method, the enriched population (50% of the total sample, n=100) showed trends toward improvement with XPro on the primary endpoint (EMACC) and a key secondary endpoint (NPI) (Figure 3a). With the placebo group showing the expected decline on EMACC over six months, a beneficial effect of XPro became evident. EMACC, which measures cognition (higher scores are better), showed an effect size of 0.27, exceeding the company’s threshold of 0.2, though the p-value of 0.16 fell short of the <0.1 target. For neuropsychiatric symptoms (NPI), the enriched population showed a stronger beneficial effect compared to the overall population, with an effect size of -0.23 and a p-value of 0.2. There was no effect on CDR-SB, which measures cognition and function (lower scores are better). Within the dose compliant group of patients, there was an increased benefit seen corresponding to the amount of XPro received during the trial (Figure 3b). We also evaluated the effect size of additional endpoints (Figure 4). Across most endpoints, XPro showed favorable trends, with effect sizes approaching the 0.2 threshold for clinical relevance.

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Figure 3a: Phase 2 Study Results – Enriched population primary and key secondary endpoints, change from baseline

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Figure 3: The enriched population show effect size >0.2 favoring XPro1595 on the EMACC and NPI. , A higher EMACC score =better, A lower CDR and NPI score is better. EMACC: LS Mean Diff (SE): 0.086 (0.0603), 90% CI: -0.0146, 0.1857, p-value: 0.1594. CDR-SB: LS Mean Diff (SE): -0.08 (0.307), 90% CI: -0.593, 0.426, p-value: 0.7859. NPI: LS Mean Diff (SE): -1.6 (1.25), 90% CI: -3.71, 0.47, p-value: 0.2003

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Figure 3b: Phase 2 Study Results – XPro had greater impact on dose compliant patients

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Figure 4: Effect size of XPro across multiple endpoints described as absolute effect sizes (cohen’s D).

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Demographics

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Safety

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The Company believes these findings from the Phase 2 results indicate that XPro may offer benefits to a readily identified subgroup of Alzheimer’s patients across all ages with biomarker-defined neuroinflammation, regardless of comorbidities or ApoE4 status and potentially lays the foundation for advancing XPro as a promising treatment for AD. The Company is planning an end-of-phase 2 meeting with the FDA, which is expected to occur towards the end of 2025 or early 2026, to determine next steps and expects to be eligible for one of the accelerated pathways.

Previous report

CORDStrom, developed by INmune Bio circa 2020, represents a breakthrough in mesenchymal stromal cell technology. The CORDStrom platform leverages, among other things, proprietary screening, pooling and expansion techniques to create off-the-shelf, allogeneic, pooled human umbilical cord -derived mesenchymal stromal cells (HucMSCs) as medicines to treat complex inflammatory diseases. CORDStrom products are designed to provide high-quality, off-the-shelf, batch-to-batch consistent, scalable, cGMP manufactured, potent cellular medicines that can be produced at low cost and with repeatable specification. Initially developed at the INKmune manufacturing facilities utilizing United Kingdom academic grant funding, CORDStrom is a product platform that shows promise as a therapy for RDEB and many other debilitating conditions. While the first generation CORDStrom product is agnostic to indication, the platform enables creation of indication-specific products, which can be tuned for optimization of anti-inflammatory, immunomodulatory, wound healing, and other characteristics.

Previous report

The CORDStrom product platform shares many similarities, including raw materials, equipment, and procedures, with the Company’s INKmune oncology product, enabling the Company to leverage economies of scale, experienced staff, and other resources to strategically manufacture both products in a rotational campaign with resource and environmental efficiencies.

Previous report

Children with RDEB have skin that is damaged by even the smallest amount of friction which causes severe blistering, deep wounds, and scars. It is caused by a fault in a gene that makes collagen, a protein that holds the skin layers together. There are limited options available for treatment, none that adequately meet the needs of patients, and the condition gets worse over time with most children reliant on a wheelchair as they move into their teenage years. Many of those with an RDEB diagnosis will also go on to develop aggressive life-threatening skin cancer in adulthood caused by the accumulated damage to their skin. The Company estimates roughly 2,000 people suffer from RDEB in the US, United Kingdom and EU representing a large unmet opportunity to potentially provide routine clinical care to these children.

Previous report

Since 2020, the Company has supplied CORDStrom HucMSCs as an investigational medical product to the Great Ormond Street Hospital (“GOSH”), London, in connection with the MissionEB study, which was primarily funded by a grant from the National Institute for Health and Care Research (“NIHR”) in the United Kingdom. INmune Bio was compensated for CORDStrom used in the trial and was not a sponsor of the Mission EB study. Investigators recently concluded a double blinded, placebo-controlled arm of the study, which evaluated the safety and efficacy of CORDStrom in 30 pediatric patients (less than 16 years old) in the United Kingdom with intermediate and severe RDEB using a novel cross-over clinical trial design. Patients were randomized to CORDStrom or placebo arms and received 2, intravenous infusions two weeks apart and then followed for 9 months. Each child then crossed over to the other arm and received two doses of placebo or CORDStrom two weeks apart with a further 9-month follow-up.

Previous report

All patients were treated as day-cases and no CORDStrom related serious adverse events were reported through the study. Top-line results showed the treatment was easily administered, well tolerated and there were beneficial effects across all types of patients receiving CORDStrom with respect to Itch Man Scale, iscorEB clinician score and iscorEB skin involvement. Most notably, CORDStrom significantly reduced itch scores as measured by the Itch Man Scale. In patients with the most severe disease activity, CORDStrom reduced itch at 3 months and led to a sustained reduction of over 27% at 6 months. These results demonstrate a clinically meaningful reduction in itch severity sustained over time. Intermediate group patients showed a broader range of improvements, including reduced skin involvement and less pain as well as large reduction in itch. The younger patients (less than 10 years old) showed improvements in skin score, indicating better skin integrity and reduced disease activity. Interviews with patients and caregivers on completing follow up strongly support the clinical benefits of the therapy; both caregivers and patients were able to correctly identify which treatment had been CORDStrom and which had been placebo. Those who completed the study are asking to continue on therapy, which the Company intends to pursue as an open-label study.

Previous report

The Mission EB data form the basis of a license that was entered into between INmune Bio and GOSH, whereby the Company gains exclusive access to the clinical study data for commercial uses in exchange for payment of an initiation milestone of approximately $0.3 million which the Company paid during July 2025 and a single development milestone of approximately £6 million (approximately $8.1 million at September 30, 2025) due on receipt of first marketing authorization from the FDA, EMA, or MHRA, which has not occurred yet, and an ongoing commitment to supply CORDStrom to patients enrolled in an open label arm of the Mission EB trial, subject to certain limitations.

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After reviewing results of the Mission EB study, the Company initiated a Type C meeting with the FDA to obtain CMC and regulatory feedback and submitted information, data and requests for Rare Pediatric Disease and Orphan Drug Designations (RPDD/ODD).

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The FDA granted RPDD to the Company’s CORDStrom product on December 13, 2024, ahead of the sunset period under Section 529(b)(5) of the Federal Food, Drug, and Cosmetic Act. As such, CORDStrom remains eligible to receive a Priority Review Voucher (PRV) if approved by the FDA on or prior to September 30, 2026, assuming the PRV program is not extended. If granted, a PRV can be redeemed to receive priority review for a different product. Alternatively, a PRV may be transferred or sold to another organization.

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The FDA granted ODD to the Company’s CORDStrom product on January 6, 2025. Benefits of ODD include certain tax credits and eligibility for select grants, waiver of FDA user fees, including the BLA application fees, access to frequent meetings with the FDA for efficient drug development, and eligibility for seven (7) years of market exclusivity post approval.

Previous report

The Company plans to prepare for and hold a pre-BLA meeting to discuss particulars of its planned BLA submission, with intent to submit a BLA this year seeking approval of CORDStrom for treatment of RDEB. Concurrently, the Company will also seek to submit MAAs to the EU and United Kingdom in 2026.

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We have demonstrated that INKmune improves the ability of the patient’s own NK cells to attack their tumor. INKmune interacts with the patient’s NK cells to convert them from inert resting NK cells into memory-like NK cells that kill the patient’s cancer cells. INKmune is designed to be given to patients after their immune system has recovered after cytotoxic chemotherapy to target the residual disease that remains after treatment with cytotoxic therapy. We believe INKmune can be used to treat numerous hematologic malignancies and solid tumors including leukemia, multiple myeloma, lymphoma, lung, ovary, breast, renal and prostate cancer. The Company sponsored a Phase I trial using INKmune to treat patients with high risk MDS/AML, a form of leukemia in the UK. Due to Covid restrictions only one patient completed treatment and follow-up in the Phase I trial for MDS; a further three AML patients were treated compassionately. Due to the post-Covid recruitment problems, the Company decided to terminate further enrollment in the MDS/AML trial in March 2024. Nonetheless, from the four patients treated and completing follow-up it was determined that INKmune therapy is safe and promotes development of cancer killing memory-like NK cells that are activated and can kill NK-resistant cancer cells which can be found in the patient’s circulation for up to 4 months after completion of treatment. The Company initiated a separate multicenter Phase I/II trial of INKmune in a metastatic castrate resistant prostate cancer in the US. The open label trial enrolled the first patient in December 2023 and is currently in Phase II across 6 US sites.

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The Phase I/II trial using INKmune to treat patients with metastatic castrate resistant prostate cancer (mCPRC) is an open label trial. Biomarker data from the patients will be visible as patients are treated. The Company plans to report data from each cohort as it becomes available. Because of the modified Bayesian design, the Company estimates the trial will be completely enrolled during the fourth quarter of 2025 with top-line data anticipated approximately 6 months thereafter. Topline data are divided into immunologic and tumor response variables. The most important immunologic response variable is related to memory-like NK cell persistence. There are 3 important variables to tumor response: i) blood PSA changes; ii) change in PSMA-PET scan and iii) change in circulating tumor DNA (ctDNA). INKmune is not a hormone-targeting treatment and will not directly reduce PSA levels but tumor load measured by PSMA-PET and/or ctDNA are expected to decrease with treatment. We do not expect this 6-month trial to provide survival data.

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Other Developments

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The new U.S. administration has announced or imposed a series of tariffs on U.S. trading partners. In response, several countries have threatened or imposed retaliatory measures. At this time, we do not anticipate the tariffs and changes in trade policies in place as of the filing of this Quarterly Report on Form 10-Q to have a significant adverse effect on our business or operations.

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Following recent changes more broadly within the NIH and FDA, we have not noticed any disruption of communications with the NIH and FDA to date and continue to maintain productive interactions. To date, there has been no impact to the Company’s operations due to any changes at the NIH or FDA.

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General and administrative expenses were approximately $2.5 million during the three months ended September 30, 2025, compared to $2.2 million during the three months ended September 30, 2024. The increase in general and administrative expenses was mainly due to the Company incurring $0.6 million higher stock-based compensation during 2025, partially offset by $0.2 million lower professional fees.

Previous report

During the three months ended September 30, 2025, the Company recorded $1.0 million of other income, of which approximately $0.6 million was gain on forgiveness of payables from two vendors and approximately $0.4 million was due to interest income.

Previous report

During the three months ended September 30, 2024, the Company’s other income consisted of interest income partially offset by interest expense.

Current report — wording carried from elsewhere

Operating activities used approximately $6.8 million of cash during the three months ended March 31, 2025, and was primarily due to our loss of $9.7 million, partially offset by non-cash stock-based compensation of $2.1 million and changes in our net operating assets and liabilities of $0.8 million which is mainly due to an increase in accounts payable and accrued liabilities of $0.7 million.

Previous report — wording carried elsewhere

The following table summarizes our results of operations for the periods indicated: