Kabuki Syndrome

Final data from PORTICO, global Phase IIb vafidemstat trial in BPD, presented at the 37th ECNP annual conference in September Company moving forward with PORTICO-2 Phase III trial preparations following positive feedback from End-of-Phase II meeting with the FDA Company continues to strengthen IP position for vafidemstat with additional “intention to grant” communications First cohort dosed in Investigator-initiated Phase Ib study of iadademstat with venetoclax and azacitidine in first-line AML Reduction in R&D expenses for the nine months ended September 30, 2024 as a result of completion of the PORTICO clinical trial; savings of $5.1M with respect to the nine months ended September 30, 2023 MADRID and CAMBRIDGE, Mass., Oct. 24, 2024 (GLOBE NEWSWIRE) -- Oryzon Genomics, S.A. (ISIN Code: ES0167733015, ORY), a clinical-stage biopharmaceutical company leveraging epigenetics to develop therapies in diseases with strong unmet medical need, today reported financial results for the nine months ending September 30, 2024 and provided a corporate update on recent developments. Dr Carlos Buesa, Oryzon’s Chief Executive Officer said, “This quarter marked a pivotal moment for our CNS program. At the ECNP 2024 Conference, we presented the full dataset from our Phase IIb PORTICO trial of vafidemstat for Borderline Personality Disorder (BPD), and we observed notable improvements across most study endpoints compared to the topline data released in January. We also received the official minutes from our End-of-Phase II meeting with the FDA, confirming that we can proceed to a Phase III. The FDA indicated that agitation/aggression in BPD may be an acceptable indication, and agreed that we may use the same aggression scale that showed the strongest signal in Phase II. With this positive feedback, we will now begin preparations to submit the full Phase III protocol to the FDA. Careful analysis of the effect sizes in BPD has allowed us to reevaluate and increase the recruitment target for the EVOLUTION trial in schizophrenia, which continues to enroll patients in Spain. Meanwhile, we have strengthened our CNS intellectual property portfolio with additional “intention to grant” communications in two key patent families covering the use of vafidemstat in treating aggression, social withdrawal and BPD. These advancements significantly bolster our IP position for vafidemstat.” Dr Buesa continued, “In oncology, following the very positive results of our ALICE trial with iadademstat in first-line unfit AML patients, we are expanding our efforts to further evaluate therapeutic efficacy in this patient population through two additional trials. One is conducted under our CRADA agreement with the NCI, while the other is in collaboration with Oregon Health & Science University (OHSU) as an investigator-initiated study (IIS). Both trials will assess iadademstat in combination with azacitidine and venetoclax in first-line AML. The OHSU-led IIS trial has already enrolled the first cohort, representing a significant advancement in our oncology program and, if positive, could open additional options for our clinical development strategy. In addition, a new IIS sponsored by the Medical College Wisconsin in combination with azacitidine in patients with myelodysplastic syndrome is being prepared. In June, we presented promising initial data from our ongoing FRIDA Phase Ib trial, evaluating iadademstat in combination with gilteritinib in relapsed/refractory FLT3-mutant AML patients, at the EHA Conference. The data from the first two cohorts demonstrated that the combination was safe and showed strong antileukemic activity, with encouraging response rates and a shorter time to response compared to historical data on gilteritinib alone. We have since completed enrollment of the third cohort, and as the data matures, we plan to present additional results at the EHA Conference next June.” Dr Buesa added, “The positive outcome of the End-of-Phase II meeting with the FDA has been a turning point for the company, as it transitions into a Phase III company for the first time. While we remain committed to maintaining strict budgetary discipline and leveraging access to our Convertible Notes program, we anticipate receiving further financial support from the recently approved IPCEI grant from the EU, which will provide crucial resources to advance our R&D in personalized medicine for both CNS and oncology. The company is also actively engaged in discussions with corporate partners to explore potential partnerships and will continue evaluating additional financing opportunities.” Third Quarter and Recent Highlights Vafidemstat in large multifactorial CNS indications: Final data from vafidemstat’s Phase IIb PORTICO trial in BPD were presented at the New Medications Symposium, a special symposium focused on clinical trials of new compounds within the 37th European College of Neuropsychopharmacology (ECNP-2024) congress held in September in Milan, Italy. A strong improvement in State-Trait Anger Expression Inventory 2 (STAXI-2) Trait Anger, a measure of agitation and aggression, at Weeks 8–12 was observed compared to previous top line data (TLD); nominal statistical significance now of p = 0.0071 (previously 0.0259). An improvement in Borderline Evaluation of Severity (BEST), an overall measure of BPD disease severity, at Weeks 8–12 compared to TLD was also achieved; nominal statistical significance now of p = 0.0260 (previously 0.0423). Vafidemstat showed favorable results over placebo in all primary and secondary efficacy endpoints, as demonstrated by T-Forest plot analysis. The final analysis confirmed now a global treatment effect favoring vafidemstat by the Global Statistical Test (GST), with the GST p-value showing a statistical significance, particularly when considering global improvement in the severity of the disease and in agitation/aggression (p = 0.0362). Vafidemstat was, as in all previous clinical studies, safe and well-tolerated. Oryzon has received the minutes from the end-of-Phase II meeting with the U.S. Food and Drug Administration (FDA). Based on the positive feedback received, ORYZON has started preparations for Phase III, including the preparation of a full protocol for the PORTICO-2 Phase III trial to submit to the FDA for study approval. The trial will use STAXI-2 Trait anger as a primary efficacy endpoint measure. Secondary endpoints will include both patient-rated and clinician-rated scales, such as CGI-S A/A to assess agitation/aggression, and BEST and CGI-S to assess overall BPD improvement.The estimated total sample size for PORTICO-2 is 350 patients (randomized 1:1 vafidemstat or control), with a trial duration of 18 weeks in total. Subject to FDA’s review of the final data, the PORTICO-2 Phase III study has the potential to be one of the two registrational trials required by the FDA. The company expects to obtain FDA’s approval for PORTICO-2 by end of 1Q2025. Oryzon has continued to strengthen its patent portfolio for vafidemstat during this quarter. The European Patent Office (EPO) recently granted Oryzon’s European patent EP3661510B1, titled “Methods of treating behavior alterations”; the granted claims cover the use of vafidemstat for the treatment of aggression and social withdrawal. A corresponding patent has also been granted in South Korea and we have received “intention to grant” communications in Australia and Malaysia. These patents will not expire until at least 2038, excluding any potential patent term extension that may provide additional years of protection. In addition, Oryzon has received “intention to grant” communications in Europe and Mexico for another key patent family related to vafidemstat titled “Methods of treating borderline personality disorder”, and a corresponding patent has been granted in Japan. These patents will not expire until at least 2040, excluding potential patent term extensions that may provide additional protection. Another patent, covering the use of vafidemstat to treat ADHD, has also been granted in Japan during this period. The EVOLUTION Phase IIb clinical trial evaluating vafidemstat in patients with schizophrenia continues to enroll participants. This study aims to assess the efficacy of vafidemstat, with a primary focus on improving negative symptoms. Following a careful analysis of effect sizes observed in BPD, we have reevaluated and increased the recruitment target for the trial. In addition to negative symptoms, the trial is also exploring as secondary endpoints vafidemstat’s efficacy in improving cognitive impairment and positive symptoms in schizophrenia. The project is partially funded by the Spanish Ministry of Science and Innovation and is being conducted at multiple hospitals across Spain. Vafidemstat in monogenic CNS indications: We continue to evaluate the feasibility of a new precision medicine trial in Kabuki Syndrome. The company will decide on a possible submission of an IND for HOPE to the FDA in 2025. Iadademstat in oncology: FRIDA, an open-label, multicenter Phase Ib clinical trial of iadademstat in combination with gilteritinib in patients with relapsed/refractory (R/R) Acute Myeloid Leukemia (AML) harboring a FMS-like tyrosine kinase mutation (FLT3mut+), continues to enroll patients. Following the FDA’s new OPTIMUS doctrine, the company continues to explore the minimal dose with clinical activity. The primary objectives of the trial are to evaluate the safety and tolerability of iadademstat in combination with gilteritinib in patients with FLT3mut+ R/R AML and to establish the Recommended Phase 2 Dose (RP2D) for this combination. Secondary objectives include the evaluation of the treatment efficacy, measured as the rate of complete remission and complete remission with partial hematological recovery (CR/CRh), the Duration of Responses (DoR), and the assessment of Measurable Residual Disease (MRD). The study is being conducted in the U.S. and will accrue up to approximately 45 patients. If successful, Oryzon and the FDA have agreed to hold a meeting to discuss the best plan to further develop this combination in this much-in-need AML population. The first patients have been dosed in the Investigator-initiated study (IIS) sponsored by the Oregon Health & Science University (OHSU) Knight Cancer Institute evaluating the combination of iadademstat with venetoclax and azacitidine in first line AML. Dr. Curtis Lachowiez is the Principal Investigator (PI) of the trial. This Phase Ib dose-finding study is now actively enrolling patients. Iadademstat will also be evaluated in combination with venetoclax and azacitidine in first-line AML patients in a trial under the Cooperative Research and Development Agreement (CRADA) signed with the National Cancer Institute (NCI) in the United States. The trial will be conducted and sponsored by the NCI, with Dr. Natalie Galanina from the University of Pittsburgh Cancer Institute as the main PI for the trial. The trial plans to enroll 45 patients and, according to NCI, is expected to start enrolling patients in 4Q2024. The Company is further expanding the clinical development of iadademstat in hemato-oncology through a new IIS led by the Medical College of Wisconsin, which will evaluate iadademstat in combination with azacitidine in adult subjects with myelodysplastic syndrome. The collaborative Phase II basket trial of iadademstat in combination with paclitaxel in platinum R/R small cell lung cancer (SCLC) and extrapulmonary high-grade neuroendocrine tumors (NET trial) continues to enroll patients. This trial is being conducted in the U.S. under a collaborative clinical research agreement with the Fox Chase Cancer Center. The Phase I/II trial with iadademstat plus immune checkpoint inhibitors in first line SCLC patients with extensive disease under the CRADA agreement with the NCI, already approved by the FDA, is now ready to start enrolling patients. The trial is titled “A Phase I Dose Finding and Phase II Randomized Trial of Iadademstat Combined With Immune Checkpoint Inhibition Maintenance After Initial Chemoimmunotherapy in Patients With Extensive-Stage Small Cell Lung Cancer” and will be conducted and sponsored by the NCI, with Dr. Charles Rudin from the Memorial Sloan Kettering Cancer Center (MSKCC) as the main PI for the trial, and Dr. Noura Choudhury from University of Chicago as co-PI A number of prestigious cancer centers in the US, including the MSKCC, the JHU Sidney Kimmel Comprehensive Cancer Center and many others will participate. The trial plans to enroll 45-50 patients and is expected to start enrolling patients in 4Q2024. The STELLAR trial, a randomized, multicenter Phase II study of iadademstat plus a checkpoint inhibitor in first-line extensive-stage SCLC, will be informed and refined from the findings of the CRADA-MSKCC trial. The company believes that STELLAR could potentially support an application for accelerated approval. Earlier stage programs: ORY-4001, Oryzon’s highly selective histone deacetylase 6 (HDAC6) inhibitor nominated as a clinical candidate for the treatment of certain neurological diseases such as Charcot-Marie-Tooth disease (CMT), Amyotrophic Lateral Sclerosis (ALS) and others, continues to progress through IND enabling studies to prepare it for clinical studies. Financial Update: Third quarter 2024 Financial Results Research and development (R&D) expenses were $1.9 million and $7.1 million for the quarter and nine months ended September 30, 2024, compared to $3.8 and $12.2 million for the quarter and nine months ended September 30, 2023. As a result of the completion of the PORTICO clinical trial, the company saves $5.1M with respect to the third quarter of 2023. General and administrative expenses were $0.9 and $3.1 million for the quarter and nine months ended September 30, 2024, compared to $0.7 and $2.9 million for the quarter and nine months ended September 30, 2023. Net losses were $1.1 and $3.8 million for the quarter and nine months ended September 30, 2024, compared to $0.8 and 3.4 million for the quarter and nine months ended September 30, 2023. The result is as expected, given the biotechnology business model where companies in the development phase typically have a long-term maturation period for products and do not have recurrent income. Negative net result was $2.5 million (–$0.04 per share) for the nine months ended September30, 2024, compared to a negative net result of $1.7 million (–$0.03 per share) for the nine months ended September 30, 2023. Cash, cash equivalents, and marketable securities totaled $8.4 million as of September 30, 2024. ORYZON GENOMICS, S.A. BALANCE SHEET DATA (UNAUDITED) 1 (Amounts in thousands US $) September 30th, 2024 September 30th, 2023 Cash and cash equivalents 8,442 8,818 Marketable securities 0 0 Total Assets 122,661 108,303 Deferred revenue 0 0 Total Stockholders’ equity 96,854 83,920 ORYZON GENOMICS, S.A. STATEMENTS OF OPERATIONS (UNAUDITED) 1 (US $, amounts in thousands except per share data) Three Months Ended September 30th Nine Months Ended September 30th 2024 2023 2024 2023 Collaboration Revenue 0 0 0 0 Operating expenses: Research and Development 1,915 3,821 7,076 12,237 General and administrative 879 674 3,051 2,934 Total operating expenses 2,794 4,495 10,127 15,171 Loss from Operations -2,794 -4,495 -10,127 -15,171 Other income, net 1,671 3,669 6,312 11,728 Net Loss -1,123 -826 -3,815 -3,443 Net Financial & Tax -256 -300 1,272 1,716 Net Result -1,379 -1,126 -2,543 -1,727 Loss per share allocable to common stockholders: Basic -0.02 -0.02 -0.04 -0.03 Weighted average Shares outstanding Basic 63,383,939 58,154,298 62,336,626 57,234,937 1 Spanish GAAP About Oryzon Founded in 2000 in Barcelona, Spain, Oryzon (ISIN Code: ES0167733015) is a clinical stage biopharmaceutical company and the European leader in epigenetics, with a strong focus on personalized medicine in CNS disorders and oncology. Oryzon’s team is composed of highly qualified professionals from the pharma industry located in Barcelona, Boston, and San Diego. Oryzon has an advanced clinical portfolio with two LSD1 inhibitors, vafidemstat in CNS and iadademstat in oncology, in several Phase II clinical trials. The company has other pipeline assets directed against other epigenetic targets like HDAC-6 where a clinical candidate ORY-4001, has been nominated for its possible development in CMT and ALS. In addition, Oryzon has a strong platform for biomarker identification and target validation for a variety of malignant and neurological diseases. For more information, visit . About Iadademstat Iadademstat (ORY-1001) is a small oral molecule, which acts as a highly selective inhibitor of the epigenetic enzyme LSD1 and has a powerful differentiating effect in hematologic cancers (see Maes et al., Cancer Cell 2018 Mar 12; 33 (3): 495-511.e12.doi: 10.1016 / j.ccell.2018.02.002.). A FiM Phase I/IIa clinical trial with iadademstat in R/R AML patients demonstrated the safety and good tolerability of the drug and preliminary signs of antileukemic activity, including a CRi (see Salamero et al, J Clin Oncol, 2020, 38(36): 4260-4273. doi: 10.1200/JCO.19.03250). Iadademstat has shown encouraging safety and efficacy data in combination with azacitidine in a Phase IIa trial in elder 1L AML patients (ALICE trial) (see Salamero et al., ASH 2022 oral presentation & The Lancet Haematology, 2024, 11(7):e487-e498). Iadademstat is currently being evaluated in combination with gilteritinib in the ongoing Phase Ib FRIDA trial in patients with relapsed/refractory AML with FLT3 mutations, and in combination with azacitidine and venetoclax in 1L AML in an investigator-initiated study led by OHSU. Beyond hematological cancers, the inhibition of LSD1 has been proposed as a valid therapeutic approach in some solid tumors such as small cell lung cancer (SCLC), neuroendocrine tumors (NET), medulloblastoma and others. In a Phase IIa trial in combination with platinum/etoposide in second line ED-SCLC patients (CLEPSIDRA trial), preliminary activity and safety results have been reported (see Navarro et al., ESMO 2018 poster). Iadademstat is being evaluated in a collaborative Phase II basket study with the Fox Chase Cancer Center (FCCC) in combination with paclitaxel in R/R neuroendocrine carcinomas, and the company is preparing a new trial in combination with immune checkpoint inhibitors (ICI) in SCLC. Oryzon has entered into a Cooperative Research and Development Agreement (CRADA) with the U.S. National Cancer Institute (NCI) to collaborate on potential further clinical development of iadademstat in different types of solid and hematological cancers; the first two trials will evaluate iadademstat in combination with ICI in SCLC and in combination with azacitidine and venetoclax in 1L AML. Oryzon is further expanding the clinical development of iadademstat through additional investigator-initiated studies. Iadademstat has orphan drug designation for SCLC in the US and for AML in the US and EU. About Vafidemstat Vafidemstat (ORY-2001) is an oral, CNS-optimized LSD1 inhibitor. The molecule acts on several levels: it reduces cognitive impairment, including memory loss and neuroinflammation, and at the same time has neuroprotective effects. In animal studies vafidemstat not only restores memory but reduces the exacerbated aggressiveness of SAMP8 mice, a model for accelerated aging and Alzheimer’s disease (AD), to normal levels and also reduces social avoidance and enhances sociability in murine models. In addition, vafidemstat exhibits fast, strong, and durable efficacy in several preclinical models of multiple sclerosis (MS). Oryzon has performed two Phase IIa clinical trials in aggressiveness in patients with different psychiatric disorders (REIMAGINE) and in aggressive/agitated patients with moderate or severe AD (REIMAGINE-AD), with positive clinical results reported in both. Additional finalized Phase IIa clinical trials with vafidemstat include the ETHERAL trial in patients with Mild to Moderate AD, where a significant reduction of the inflammatory biomarker YKL40 has been observed after 6 and 12 months of treatment, and the pilot, small-scale SATEEN trial in Relapse-Remitting and Secondary Progressive MS, where anti-inflammatory activity has also been observed. Vafidemstat has also been tested in a Phase II in severe Covid-19 patients (ESCAPE) assessing the capability of the drug to prevent ARDS, one of the most severe complications of the viral infection, where it showed significant anti-inflammatory effects in severe Covid-19 patients. Vafidemstat is being investigated in neuropsychiatric disorders in two double-blind, randomized, placebo-controlled Phase IIb trials: one in negative symptoms of schizophrenia, named EVOLUTION (recruitment ongoing), and another one in Borderline Personality disorder (BPD), named PORTICO, completed and with published final data. Following receipt of the minutes from the End-of-Phase II meeting with the FDA to discuss PORTICO’s results, the company recently announced plans to move forward with a Phase III PORTICO-2 trial in BPD. The company is also deploying a CNS precision medicine approach with vafidemstat in genetically-defined patient subpopulations of certain CNS disorders and is evaluating a clinical trial in Kabuki Syndrome patients. The company is also exploring the clinical development of vafidemstat in other neurodevelopmental syndromes. FORWARD-LOOKING STATEMENTS This communication contains, or may contain, forward-looking information and statements about Oryzon, including financial projections and estimates and their underlying assumptions, statements regarding plans, objectives, and expectations with respect to future operations, capital expenditures, synergies, products and services, and statements regarding future performance. Forward-looking statements are statements that are not historical facts and are generally identified by the words “expects,” “anticipates,” “believes,” “intends,” “estimates” and similar expressions. 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Any public offering of Oryzon’s securities to be made in the United States will be made by means of a prospectus that may be obtained from Oryzon or the selling security holder, as applicable, that will contain detailed information about Oryzon and management, as well as financial statements. Spain Oryzon IR, US IR & Media, Europe Patricia Cobo/Mario Cordera Emili Torrell Ashley R. Robinson Sandya von der Weid Atrevia Chief Business Officer LifeSci Advisors, LLC LifeSci Advisors, LLC +34 91 564 07 25 +34 673 33 97 65 +34 93 515 1313 +1 617 430 7577 +41 78 680 05 38 pcobo@atrevia.com mcordera@atrevia.com etorrell@oryzon.com arr@lifesciadvisors.com svonderweid@lifesciadvisors.com

FDA’s feedback supports the initiation of the Phase III trialAgitation-Aggression in Borderline Personality Disorder (BPD) acknowledged as a possible therapeutic indicationOryzon may use STAXI-2 Trait anger as a primary efficacy endpoint for PORTICO-2Currently no FDA-approved treatments for BPD Company to host conference call and live webcast today at 09:00 am EDT (15:00 pm CET) MADRID and CAMBRIDGE, Mass., Oct. 01, 2024 (GLOBE NEWSWIRE) -- Oryzon Genomics, S.A. (ISIN Code: ES0167733015, ORY), a clinical-stage biopharmaceutical company leveraging epigenetics to develop therapies in diseases with strong unmet medical need, announced today the receipt of the official meeting minutes from a recent End-of-Phase II meeting for vafidemstat in Borderline Personality Disorder (BPD) with the US Food and Drug Administration (FDA). Based on the positive feedback received, ORYZON will now move forward with preparing a full PORTICO-2 Phase III trial protocol to be submitted to the FDA for study approval. At the End-of-Phase II meeting with the FDA, held in late August, various aspects of vafidemstat’s development plan were thoroughly evaluated and discussed. The minutes cover the FDA’s opinion on the suitability of the vafidemstat program to date in several critical areas: i) preclinical data, ii) toxicology, iii) clinical pharmacology, and iv) clinical studies. The meeting minutes confirm that both the company and the FDA reached clarity on several key elements of the PORTICO-2 Phase III clinical trial design for vafidemstat. The most significant points are summarized as follows: Agitation-aggression in BPD has the potential to be acceptable as a target indication.The FDA agrees that Oryzon may pursue a Phase III study using STAXI-2 Trait anger as a primary efficacy endpoint measure, but the company will have to provide additional information to demonstrate that STAXI-2 Trait anger is a clinically meaningful endpoint in this indication (i.e. through a Qualitative Research of the scale in BPD patients).Secondary endpoints will include both patient-rated and clinician-rated scales, as CGI-S A/A to assess agitation/aggression, and BEST and CGI-S to assess overall BPD improvement.A Qualitative Research Study will be conducted with a subset of PORTICO-2 patients to provide further validation of the proposed endpoints. The Qualitative Study protocol will be submitted prior to its initiation for FDA review and feedback.Oryzon plans to also provide the psychometric properties and performance for the selected primary and key secondary endpoints for FDA review prior to the initiation of the Phase III study.The estimated total sample size for the PORTICO-2 Phase III study is 350 patients (randomized 1:1 vafidemstat or control), with a trial duration of 18 weeks in total.Subject to FDA review of the final data, the PORTICO-2 Phase III study has the potential to be one of the two registrational trials required by the FDA. Using the same scale selected now as primary endpoint for assessing agitation-aggression in BPD in the PORTICO-2 Phase III trial, the STAXI-2 Trait anger scale, the Phase IIb PORTICO study demonstrated a nominally significant and clinically meaningful reduction of agitation and aggression in the vafidemstat group as compared to placebo (FAS analysis, p=0.0071 and 58.6% relative reduction over the placebo group at weeks 8-12, with p values at weeks 10 and 12 of p=0.006 and p=0.016 and relative reductions over placebo group of 92.1% and 57.1% respectively). “We have gathered a vast amount of data on vafidemstat's neurological effects through foundational research and early-stage clinical trials across various CNS disorders,” said Carlos Buesa, CEO of Oryzon. “We are thrilled with the positive outcome of our interactions with the FDA and the prospect of advancing vafidemstat into pivotal Phase III clinical studies for BPD, an area with a significant unmet medical need, as no approved drugs currently exist. Vafidemstat is built on robust science, has consistently demonstrated safety and tolerability, and this Phase III development builds on the promising clinical observations from the PORTICO Phase IIb trial discussed with the FDA. The recent allowances for vafidemstat’s patents in the field of BPD further highlight its commercial potential. This marks a defining moment for Oryzon.” Michael Ropacki, Oryzon’s CMO for CNS, added, “Following the positive presentation of PORTICO's Final Results at the ECNP New Medication Symposium, where vafidemstat demonstrated nominal statistical significance in reducing agitation and aggression on the STAXI-2 scale across Weeks 8–12, along with improvement in overall disease on the BEST scale and statistical significance on the Global Statistic Test, I am very pleased with the FDA’s End of Phase II feedback. This allows Oryzon to proceed with the planned Phase III pivotal PORTICO-2 trial. We look forward to continued collaboration with the FDA on the trial's protocol and Phase III preparations. These clinically meaningful reductions in agitation/aggression and overall disease improvement seen with vafidemstat strongly support its potential as a pharmacological treatment for BPD, with the promise to significantly improve the lives of BPD patients and their families.” Based on the positive feedback from the FDA, Oryzon will now start preparations for the Phase III program, including the preparation of a full protocol for PORTICO-2 Phase III trial to submit to the FDA. The company will now also engage with European regulatory agencies following standard practice before initiation of the PORTICO-2 Phase III trial. Conference Call/Webcast Information Oryzon invites investors and the general public to join a conference call and webcast with investment analysts today, October 1st, 2024, at 9:00 am EDT (15:00 pm CET) to discuss the outcome of the End-of-Phase II meeting. To access the live conference call, please register here. Once registered, the conference call will be available via webcast. About OryzonFounded in 2000 in Barcelona, Spain, Oryzon (ISIN Code: ES0167733015) is a clinical stage biopharmaceutical company and the European leader in epigenetics, with a strong focus on personalized medicine in CNS disorders and oncology. Oryzon’s team is composed of highly qualified professionals from the pharma industry located in Barcelona, Boston, and San Diego. Oryzon has an advanced clinical portfolio with two LSD1 inhibitors, vafidemstat in CNS and iadademstat in oncology, in several Phase II clinical trials. The company has other pipeline assets directed against other epigenetic targets like HDAC-6 where a clinical candidate ORY-4001, has been nominated for its possible development in CMT and ALS. In addition, Oryzon has a strong platform for biomarker identification and target validation for a variety of malignant and neurological diseases. For more information, visit www.oryzon.com About PORTICO PORTICO (EudraCT No.: 2020-003469-20, ClinicalTrials.gov Identifier NCT04932291) was a global, double-blind, randomized, placebo-controlled, adaptive 14-week Phase IIb trial evaluating the efficacy and safety of vafidemstat at 1.2 mg/day in a BPD population. The study recruited a total of 211 patients, randomized 1:1 in two arms. The trial had two independent primary endpoints: reduction of agitation and aggression and overall disease improvement in BPD severity. In the absence of a well-established regulatory endpoint, the trial also included two secondary endpoints also exploring the reduction of agitation and aggression and overall disease improvement in BPD severity by different scales. PORTICO included a total of 27 clinical sites, 14 in the U.S. and 13 in Europe (Germany, Spain, Bulgaria, and Serbia). Final data of this trial were presented at the 37th European College of Neuropsychopharmacology (ECNP-2024) congress (see here) About Vafidemstat Vafidemstat (ORY-2001) is an oral, CNS-optimized LSD1 inhibitor. The molecule acts on several levels: it reduces cognitive impairment, including memory loss and neuroinflammation, and at the same time has neuroprotective effects. In animal studies vafidemstat not only restores memory but reduces the exacerbated aggressiveness of SAMP8 mice, a model for accelerated aging and Alzheimer’s disease (AD), to normal levels and also reduces social avoidance and enhances sociability in murine models. In addition, vafidemstat exhibits fast, strong, and durable efficacy in several preclinical models of multiple sclerosis (MS). Oryzon has performed two Phase IIa clinical trials in aggressiveness in patients with different psychiatric disorders (REIMAGINE) and in aggressive/agitated patients with moderate or severe AD (REIMAGINE-AD), with positive clinical results reported in both. Additional finalized Phase IIa clinical trials with vafidemstat include the ETHERAL trial in patients with Mild to Moderate AD, where a significant reduction of the inflammatory biomarker YKL40 has been observed after 6 and 12 months of treatment, and the pilot, small-scale SATEEN trial in Relapse-Remitting and Secondary Progressive MS, where anti-inflammatory activity has also been observed. Vafidemstat has also been tested in a Phase II in severe Covid-19 patients (ESCAPE) assessing the capability of the drug to prevent ARDS, one of the most severe complications of the viral infection, where it showed significant anti-inflammatory effects in severe Covid-19 patients. Vafidemstat is being investigated in neuropsychiatric disorders in two double-blind, randomized, placebo-controlled Phase IIb trials: one in negative symptoms of schizophrenia, named EVOLUTION (recruitment ongoing), and another one in Borderline Personality disorder (BPD), named PORTICO, completed and with published final data (see above). Based on PORTICO’s results, the company has held an End-of-Phase II meeting with the FDA to discuss options for a registrational Phase III trial in BPD. The company is also deploying a CNS precision medicine approach with vafidemstat in genetically-defined patient subpopulations of certain CNS disorders and is preparing a clinical trial in Kabuki Syndrome patients. The company is also exploring the clinical development of vafidemstat in other neurodevelopmental syndromes. About Borderline Personality DisorderBorderline Personality Disorder (BPD) is one of the most complex, functionally debilitating and costly psychiatric illnesses for health care systems, affecting between 0.5 and 1.6% of the general population. BPD patients often experience emotional instability, impulsivity, irrational beliefs and distorted perception, and intense but unstable relationships with others. Up to 10% of those affected die by suicide. Psychotherapy is the first-line treatment and while medications may be prescribed to treat specific symptoms, there is no FDA-approved treatment for BPD patients. It is estimated that around 1.4 million BPD patients in the U.S. are being treated with off-label drugs, approved for other conditions and which manage symptoms rather than the disease itself. FORWARD-LOOKING STATEMENTSThis communication contains, or may contain, forward-looking information and statements about Oryzon, including financial projections and estimates and their underlying assumptions, statements regarding plans, objectives, and expectations with respect to future operations, capital expenditures, synergies, products and services, and statements regarding future performance. Forward-looking statements are statements that are not historical facts and are generally identified by the words “expects,” “anticipates,” “believes,” “intends,” “estimates” and similar expressions. Although Oryzon believes that the expectations reflected in such forward-looking statements are reasonable, investors and holders of Oryzon shares are cautioned that forward-looking information and statements are subject to various risks and uncertainties, many of which are difficult to predict and generally beyond the control of Oryzon that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include those discussed or identified in the documents sent by Oryzon to the Spanish Comisión Nacional del Mercado de Valores (CNMV), which are accessible to the public. Forward-looking statements are not guarantees of future performance and have not been reviewed by the auditors of Oryzon. You are cautioned not to place undue reliance on the forward-looking statements, which speak only as of the date they were made. All subsequent oral or written forward-looking statements attributable to Oryzon or any of its members, directors, officers, employees, or any persons acting on its behalf are expressly qualified in their entirety by the cautionary statement above. All forward-looking statements included herein are based on information available to Oryzon on the date hereof. Except as required by applicable law, Oryzon does not undertake any obligation to publicly update or revise any forward‐looking statements, whether as a result of new information, future events, or otherwise. This press release is not an offer of securities for sale in the United States or any other jurisdiction. Oryzon’s securities may not be offered or sold in the United States absent registration or an exemption from registration. Any public offering of Oryzon’s securities to be made in the United States will be made by means of a prospectus that may be obtained from Oryzon or the selling security holder, as applicable, that will contain detailed information about Oryzon and management, as well as financial statements. Spain Oryzon IR, US IR & Media, Europe Patricia Cobo/Mario Cordera Emili Torrell Ashley R. Robinson Sandya von der Weid Atrevia Chief Business Officer LifeSci Advisors, LLC LifeSci Advisors, LLC +34 91 564 07 25 +34 673 33 97 65 +34 93 515 1313 +1 617 430 7577 +41 78 680 05 38 pcobo@atrevia.com mcordera@atrevia.com etorrell@oryzon.com arr@lifesciadvisors.com svonderweid@lifesciadvisors.com

Strong improvement in State-Trait Anger Expression Inventory 2 (STAXI-2) Trait Anger, a measure of agitation and aggression, at Weeks 8–12 compared to previous top line data; nominal statistical significance now of p = 0.0071Improvement in Borderline Evaluation of Severity (BEST), an overall measure of BPD disease severity, at Weeks 8–12 compared to previous top line data; nominal statistical significance now of p = 0.0260Vafidemstat showed favorable results over placebo in all primary and secondary efficacy endpoints, as demonstrated by T-Forest plot analysisGlobal Statistical Test (GST p-values) significant and consistent with a global treatment effect favoring vafidemstatCompany presented the data to the FDA and discussed potential registrational Phase III vafidemstat study for the treatment of BPD at a recent End-of-Phase II meeting MADRID and CAMBRIDGE, Mass., Sept. 23, 2024 (GLOBE NEWSWIRE) -- Oryzon Genomics, S.A. (ISIN Code: ES0167733015, ORY), a clinical-stage biopharmaceutical company leveraging epigenetics to develop therapies in diseases with strong unmet medical need, announced that it will present today the final data from its Phase IIb PORTICO trial of vafidemstat in patients with Borderline Personality Disorder (BPD) as an oral presentation at the New Medications Symposium, a special symposium focused on clinical trials of new compounds within the 37th European College of Neuropsychopharmacology (ECNP-2024) congress, which is currently being held in Milan (Italy). Oryzon’s oral presentation, titled “Final results: Phase 2b PORTICO Study: Efficacy of Vafidemstat in Borderline Personality Disorder”, will be delivered by Dr. Michael Ropacki, Oryzon’s Chief Medical Officer for CNS. In addition to the oral presentation, the results will also be presented as a poster at ECNP-2024. PORTICO (EudraCT No.: 2020-003469-20, ClinicalTrials.gov Identifier NCT04932291) was a global double-blind, randomized, placebo-controlled, adaptive 14-week Phase IIb trial evaluating the efficacy and safety of vafidemstat at 1.2 mg/day in a BPD population. The study recruited a total of 211 patients, randomized 1:1 in two arms. The trial had two independent primary endpoints: reduction of agitation and aggression and overall disease improvement in BPD severity. In the absence of a well-established regulatory endpoint, the trial also included two secondary endpoints also exploring the reduction of agitation and aggression and overall disease improvement in BPD severity by different scales. PORTICO included a total of 27 clinical sites, 14 in the U.S. and 13 in Europe (Germany, Spain, Bulgaria, and Serbia). Dr. Michael Ropacki, Oryzon’s Chief Medical Officer for CNS stated, “The PORTICO results are exciting and extremely promising in several ways. These full results are improved compared to the topline results shared in January 2024. BPD is a serious mental health disease with great interpersonal, social, and economic burden, and vafidemstat potentially proposes a novel treatment option with an epigenetic mechanism-of-action that does not have the side-effect baggage of current off-label treatments. The significant and clinically meaningful reductions in agitation and aggression as well as overall disease improvement produced by vafidemstat offer the first potential pharmacologic treatment to significantly improve the lives of BPD patients and those around them.” Dr. Carlos Buesa, Oryzon’s CEO added: “PORTICO marks a significant milestone in BPD research, as this is the first time, to our knowledge, that statistical significance was achieved in a large, randomized Phase IIb trial in BPD. Our study demonstrated meaningful improvements, and vafidemstat seems to produce a holistic effect in the disease. In a recent End-of-Phase II meeting with the FDA we had the opportunity to discuss these results. A positive response from the FDA would trigger immediate preparations of our PORTICO-2 Phase III trial, and would make Oryzon the first, and only, company with a drug in Phase III clinical development in BPD, an indication with a huge unmet medical need and no drugs approved. The recent grants or intention-to-grant notifications for vafidemstat’s patents in BPD and aggression received from different Patent Offices highlight the economic potential of this unique program.” Presentation Data Highlights: The final data show a significant overall improvement compared to the preliminary top-line data (TLD) released in January. Notably, the agitation and aggression of patients, as measured by the secondary endpoint STAXI-2 Trait Anger scale, showed a substantial, statistically significant, and clinically meaningful reduction in the vafidemstat arm compared to placebo, with a p-value of 0.0071 across Weeks 8–12 (previously p = 0.0259). The relative reduction in the vafidemstat-treated group over the placebo group reached a maximum of 92.1% at Week 10, with an average reduction of 58.6% across Weeks 8–12 (previously 80.8% and 46.7%, respectively).Additionally, the secondary endpoint Borderline Evaluation of Severity (BEST), an overall measure of BPD severity, also showed an improvement compared to TLD, with a p-value of 0.0260 across Weeks 8–12 (previously p = 0.0423). The maximal relative reduction in the vafidemstat-treated group over the placebo group reached 38.9% at Week 10, with an average reduction of 30.9% across Weeks 8–12.The p-values for the primary endpoints (CGI-S A/A and BPDCL) also improved compared to the preliminary TLD, but did not reach statistical significance.Interestingly, a trend of improvement in depression measured by the BDI-II Total Score by Weeks 8–12 was detected (p= 0.0944 ), with an average reduction over the placebo group of 42.2% across Weeks 8–12.The T-Forest plot analysis showed that all results continued to consistently favor vafidemstat treatment over placebo across all primary and secondary efficacy endpoints.Notably, the final analysis confirmed now a global treatment effect favoring vafidemstat by the Global Statistical Test (GST), with the GST p-value showing a statistical significance, particularly when considering global improvement in the severity of the disease and in agitation/aggression (p = 0.0362, previously a strong trend). The GST is designed to assess whether a treatment is effective across different aspects of a condition, efficiently summarizing the overall treatment effect, especially when dealing with complex, multifactorial diseases.Vafidemstat was, as in all previous clinical studies, safe and well-tolerated. Adverse events (AEs) were generally consistent with the safety profile of vafidemstat seen to date, with no new safety findings. Treatment-Emergent Adverse Events (TEAEs) were slightly lower in those receiving vafidemstat (57.5% vs 65.4% in the placebo group), though Treatment-Related TEAEs were similar between groups.An observation of interest was that vafidemstat-treated patients showed a reduced inclination towards self-harm compared to the ones receiving placebo (1 patient vs 6 patients in the placebo group). All these data have been presented to the FDA in an end-of-Phase II meeting held recently to discuss a registrational Phase III study for the treatment of BPD. A copy of the ECNP presentation is available here and the accompanying poster is available here About Oryzon Founded in 2000 in Barcelona, Spain, Oryzon (ISIN Code: ES0167733015) is a clinical stage biopharmaceutical company and the European leader in epigenetics, with a strong focus on personalized medicine in CNS disorders and oncology. Oryzon’s team is composed of highly qualified professionals from the pharma industry located in Barcelona, Boston, and San Diego. Oryzon has an advanced clinical portfolio with two LSD1 inhibitors, vafidemstat in CNS and iadademstat in oncology, in several Phase II clinical trials. The company has other pipeline assets directed against other epigenetic targets like HDAC-6 where a clinical candidate ORY-4001, has been nominated for its possible development in CMT and ALS. In addition, Oryzon has a strong platform for biomarker identification and target validation for a variety of malignant and neurological diseases. For more information, visit www.oryzon.com About Vafidemstat Vafidemstat (ORY-2001) is an oral, CNS-optimized LSD1 inhibitor. The molecule acts on several levels: it reduces cognitive impairment, including memory loss and neuroinflammation, and at the same time has neuroprotective effects. In animal studies vafidemstat not only restores memory but reduces the exacerbated aggressiveness of SAMP8 mice, a model for accelerated aging and Alzheimer’s disease (AD), to normal levels and also reduces social avoidance and enhances sociability in murine models. In addition, vafidemstat exhibits fast, strong, and durable efficacy in several preclinical models of multiple sclerosis (MS). Oryzon has performed two Phase IIa clinical trials in aggressiveness in patients with different psychiatric disorders (REIMAGINE) and in aggressive/agitated patients with moderate or severe AD (REIMAGINE-AD), with positive clinical results reported in both. Additional finalized Phase IIa clinical trials with vafidemstat include the ETHERAL trial in patients with Mild to Moderate AD, where a significant reduction of the inflammatory biomarker YKL40 has been observed after 6 and 12 months of treatment, and the pilot, small-scale SATEEN trial in Relapse-Remitting and Secondary Progressive MS, where anti-inflammatory activity has also been observed. Vafidemstat has also been tested in a Phase II in severe Covid-19 patients (ESCAPE) assessing the capability of the drug to prevent ARDS, one of the most severe complications of the viral infection, where it showed significant anti-inflammatory effects in severe Covid-19 patients. Vafidemstat is being investigated in neuropsychiatric disorders in two double-blind, randomized, placebo-controlled Phase IIb trials: one in schizophrenia, named EVOLUTION (recruitment ongoing), and another one in Borderline Personality disorder (BPD), named PORTICO, completed and with published results. Based on PORTICO’s results, the company has requested an End-of-Phase II meeting with the FDA to discuss options for a registrational Phase III trial in BPD. The company is also deploying a CNS precision medicine approach with vafidemstat in genetically-defined patient subpopulations of certain CNS disorders and is preparing a clinical trial in Kabuki Syndrome patients. The company is also exploring the clinical development of vafidemstat in other neurodevelopmental syndromes. About Borderline Personality DisorderBorderline Personality Disorder (BPD) is one of the most complex, functionally debilitating and costly psychiatric illnesses for health care systems, affecting between 0.5 and 1.6% of the general population. BPD patients often experience emotional instability, impulsivity, irrational beliefs and distorted perception, and intense but unstable relationships with others. Up to 10% of those affected die by suicide. Psychotherapy is the first-line treatment and while medications may be prescribed to treat specific symptoms, there is no FDA-approved treatment for BPD patients. It is estimated that around 1.4 million BPD patients in the U.S. are being treated with off-label drugs, approved for other conditions and which manage symptoms rather than the disease itself. FORWARD-LOOKING STATEMENTSThis communication contains, or may contain, forward-looking information and statements about Oryzon, including financial projections and estimates and their underlying assumptions, statements regarding plans, objectives, and expectations with respect to future operations, capital expenditures, synergies, products and services, and statements regarding future performance. Forward-looking statements are statements that are not historical facts and are generally identified by the words “expects,” “anticipates,” “believes,” “intends,” “estimates” and similar expressions. Although Oryzon believes that the expectations reflected in such forward-looking statements are reasonable, investors and holders of Oryzon shares are cautioned that forward-looking information and statements are subject to various risks and uncertainties, many of which are difficult to predict and generally beyond the control of Oryzon that could cause actual results and developments to differ materially from those expressed in, or implied or projected by, the forward-looking information and statements. These risks and uncertainties include those discussed or identified in the documents sent by Oryzon to the Spanish Comisión Nacional del Mercado de Valores (CNMV), which are accessible to the public. Forward-looking statements are not guarantees of future performance and have not been reviewed by the auditors of Oryzon. You are cautioned not to place undue reliance on the forward-looking statements, which speak only as of the date they were made. All subsequent oral or written forward-looking statements attributable to Oryzon or any of its members, directors, officers, employees, or any persons acting on its behalf are expressly qualified in their entirety by the cautionary statement above. All forward-looking statements included herein are based on information available to Oryzon on the date hereof. Except as required by applicable law, Oryzon does not undertake any obligation to publicly update or revise any forward‐looking statements, whether as a result of new information, future events, or otherwise. This press release is not an offer of securities for sale in the United States or any other jurisdiction. Oryzon’s securities may not be offered or sold in the United States absent registration or an exemption from registration. Any public offering of Oryzon’s securities to be made in the United States will be made by means of a prospectus that may be obtained from Oryzon or the selling security holder, as applicable, that will contain detailed information about Oryzon and management, as well as financial statements. Spain Oryzon IR, US IR & Media, Europe Patricia Cobo/Mario Cordera Emili Torrell Ashley R. RobinsonSandya von der Weid Atrevia Chief Business Officer LifeSci Advisors, LLC LifeSci Advisors, LLC +34 91 564 07 25 +34 673 33 97 65 +34 93 515 1313 +1 617 430 7577 +41 78 680 05 38 pcobo@atrevia.com mcordera@atrevia.com etorrell@oryzon.com arr@lifesciadvisors.com svonderweid@lifesciadvisors.com