Randomised Phase 2 study of sphingosine kinase inhibitor (opaganib) in addition to darolutamide in people with poor prognostic metastatic castration resistant prostate cancer (mCRPC) based on a companion circulating lipid biomarker, PCPro (ANZUP2205)

Start Date25 Jun 2025

Sponsor / Collaborator

Australian & New Zealand Urogenital & Prostate Cancer Trials

PER-108-20

/ SuspendedPhase 2

OPAGANIB, A SPHINGOSINE KINASE-2 (SK-2) INHIBITOR IN COVID-19 PNEUMONIA: A PHASE 2/3, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED STUDY IN HOSPITALIZED ADULT SUBJECTS WITH SEVERE SARS-COV-PNEUMONIA- 2 POSITIVE

Start Date01 Jan 2021

Sponsor / Collaborator

RedHill Biopharma Ltd.

NCT04467840

/ CompletedPhase 2/3

Opaganib, a Sphingosine Kinase-2 (SK2) Inhibitor in COVID-19 Pneumonia: a Randomized, Double-blind, Placebo-Controlled Phase 2/3 Study, in Adult Subjects Hospitalized With Severe SARS-CoV-2 Positive Pneumonia

A phase 2/3 multi-center randomized, double-blind, parallel arm, placebo- controlled study in Adult Subjects Hospitalized with Severe SARS-CoV-2 Positive Pneumonia to determine the potential of opaganib to improve and/or stabilize the clinical status of the patient.

Start Date21 Aug 2020

Sponsor / Collaborator

RedHill Biopharma Ltd.

100 Clinical Results associated with Opaganib

100 Translational Medicine associated with Opaganib

100 Patents (Medical) associated with Opaganib

110

Literatures (Medical) associated with Opaganib

01 Apr 2026·Cancer Medicine

Phase II Trial of Opaganib Addition in Metastatic Castration‐Resistant Prostate Cancer After Disease Progression on Abiraterone or Enzalutamide

Article

Author: Kent Armeson ; Terry F. Plasse ; George Magrath ; Shikhar Mehrotra ; Theodore Stewart Gourdin ; Bassel Nazha ; Anna C. Ferreira ; Omer Kucuk ; Alan Brisendine ; Besim Ogretmen ; Elizabeth G. Hill ; Jacqueline T. Brown ; Michael Lilly

ABSTRACT:

Introduction:

Opaganib is a first‐in‐class oral sphingolipid metabolism inhibitor that inhibits sphingosinekinase 2 (SphK2) and dihydroceramide desaturase (DES) and that has a demonstrated safety and preliminary anti‐cancer activity signal in a Phase I study.

Methods:

In this phase II trial, patients with metastatic castration‐resistant prostate cancer who had disease progression on novel hormonal agents (NHAs) abiraterone or enzalutamide were enrolled and treated with opaganib while continuing their NHA. After safety lead‐in cohorts, the trial enrolled cohort 2 (abiraterone + opaganib 500 mg Q 12 h) and cohort 3 (enzalutamide + opaganib 500 mg Q 12 h). The primary efficacy endpoint was the proportion of patients with disease control at Day 113. The postulated disease control rate was 10%. Secondary efficacy endpoints include prostate‐specific antigen (PSA) progression‐free survival (PSA‐PFS) and PSA response rates. The primary safety endpoint was the incidence of adverse events (AEs).

Results:

The disease control rates were 15% (95% CI = 4%–35%, 4 of 26 patients) in cohort 2 and 9% (95% CI = 2%–24%, 3 of 34 patients) in cohort 3. The median PSA‐PFS was 56 days (95% CI = 35–112 days) in cohort 2 and 55 days (95% CI = 35–56 days) in cohort 3. The most common AEs of grade 3 or higher were hypertension (8%) and musculoskeletal AEs (8%) in cohort 2 and grade 3 anemia (18%) in cohort 3.

Conclusion:

The trial did not meet its primary objective of demonstrating 30% disease control at 113 days. However, subjects who experienced a PSA response or stabilization warrant further exploration for biomarkers of response.

Trial Registration:

ClinicalTrials.gov number: NCT04207255

01 Nov 2025·LIFE SCIENCES

Subcutaneous administration of the sphingosine kinase 2 inhibitor ABC294640 has no metabolic benefits in high fat diet-induced obesity in male mice

Article

Author: Porschen, Lisa Teresa ; Skoug, Cecilia ; Stenkula, Karin G ; Duarte, João M N ; Meissner, Anja ; Vanherle, Lotte ; Fryklund, Claes

AIMS:

Experimental evidence suggests an important role for sphingosine-1-phosphate (S1P) and its generating enzymes sphingosine kinase 1/2 (SphK1/2) in obesity. We and others have shown that plasma S1P levels are elevated in obese mice and humans. Preclinical studies suggest that genetic SphK2 ablation in mice protects from age- and diet-induced obesity and metabolic dysfunction. We aimed at investigating the therapeutic potential of pharmacological SphK2 inhibition using a high-fat diet (HFD)-induced obesity model.

MATERIALS AND METHODS:

Male C57BL/6J mice were fed either a HFD (60 % fat) or a nutrient-matched control diet (CD; 10 % fat) for 9 weeks. After 7 weeks of diet exposure, when HFD-fed mice exhibited increased weight gain, impaired glucose tolerance and reduced insulin sensitivity, mice were subjected to subcutaneous SphK2 inhibitor (SphK2i, ABC294640, 5 mg/kg) or vehicle treatment every second day for two weeks.

KEY FINDINGS:

SphK2 expression was upregulated in adipose and liver tissue in response to HFD. Despite this, SphK2 inhibition did not attenuate hepatic steatosis, reduce liver weight, or improve metabolic hepatic gene expression profiles. Moreover, SphK2 inhibition exacerbated certain HFD-induced impairments, including worsened insulin tolerance and increased adipocyte hypertrophy. In CD-fed mice, SphK2 inhibition altered adipocyte size distribution but had no significant impact on systemic metabolism.

SIGNIFICANCE:

Contrary to prior studies, our findings reveal no therapeutic benefit of SphK2 inhibition in diet-induced obesity. These results underscore the importance of tissue and context specificity in targeting the sphingosine kinase pathway and caution against broadly applying SphK2 inhibition as a strategy for treating obesity-associated metabolic dysfunction.

01 Sep 2025·EUROPEAN JOURNAL OF PHARMACOLOGY

SPHK2 inhibition alleviates chronic intermittent hypoxia-induced inflammation in adipose tissue by decreasing endoplasmic reticulum stress

Article

Author: Huang, Dong ; Gu, Wenyu ; Liang, Zongan ; Wei, Chang ; Li, Peijun ; Wu, Xu ; Zhao, Yuean ; Gong, Linjing ; Ran, Longyi ; Wang, Xinyuan ; Wang, Xinyu

Obstructive Sleep Apnea (OSA), characterized by chronic intermittent hypoxia (CIH), is a prevalent disorder that significantly elevates the risk of cardiovascular and metabolic complications. Lipid metabolism disturbances, a common comorbidity in OSA, are closely associated with CIH-induced adipose tissue inflammation, yet the underlying mechanisms remain poorly defined. In this study, we established a CIH mouse model to investigate the roles of Sphingosine Kinase 2 (SPHK2) and endoplasmic reticulum stress (ERS) in CIH-induced lipid metabolic disturbances. Mice were exposed to normal air (NA) or CIH for 4 or 12 weeks. Serum triglycerides (TG), total cholesterol (TC), and low-density lipoprotein cholesterol (LDL-C) were measured to assess systemic lipid metabolism. CIH group significantly elevated SPHK2 expression and activated the PERK-ATF4-CHOP signaling pathway in epididymal (eWAT) and subcutaneous white adipose tissue (scWAT), leading to increased NLRP3 inflammasome accumulation, oxidative stress, and adipocyte apoptosis. Administration of the SPHK2 inhibitor ABC294640, opaganib, attenuated these effects, reducing ERS activation and restoring lipid homeostasis. Further, treatment with the ERS inhibitor 4-BPA suppressed oxidative stress and inflammatory cytokines, alleviating CIH-induced adipose tissue inflammation. In contrast, ERS activation by thapsigargin reversed the protective effects of SPHK2 inhibition, exacerbating metabolic and inflammatory dysregulation. In summary, our findings highlight the critical role of SPHK2 and ERS in CIH-induced adipose tissue inflammation and lipid metabolic disturbances. Pharmacological inhibition of SPHK2 represents a promising therapeutic approach for mitigating OSA-related lipid metabolic disturbances.

141

News (Medical) associated with Opaganib

28 Jul 2026

·www.prnewswire.com

Ebola Cases and Deaths Rapidly Mount - RedHill Updates on Opaganib Emergency Outbreak Development

The number of confirmed Ebola cases and deaths has increased substantially to 3221 cases and 1407 deaths -- Finalization of development next steps and potential partnership discussions ongoing, including with the Emergency Task Force expert group of the African Medicines Agency, the Ugandan Ministry of Health and Mbarara University of Science and Technology (MUST), alongside liaison with the Democratic Republic of Congo (DRC) Scientific Advisory Committee -- Professor Pauline Byakika-Kibwika, Vice Chancellor, MUST: "There is an urgent need for additional therapeutic options, and with an oral formulation, ease of administration, human safety database and supportive data, host-directed antiviral opaganib warrants immediate evaluation as a potential treatment candidate for Bundibugyo ebolavirus (BDBV)" -- Development of opaganib for Ebola is supported by preclinical and clinical safety and efficacy data from multiple studies, including in combination with direct acting antiviral Veklury® (remdesivir, Gilead Sciences) TEL AVIV, Israel and RALEIGH, N.C., July 28, 2026 /PRNewswire/ -- RedHill Biopharma Ltd. (NASDAQ: RDHL) ("RedHill" or the "Company"), a specialty biopharmaceutical company, today provided an update on the development of opaganib1 for Ebola virus disease (EVD) as the number of confirmed Bundibugyo ebolavirus (BDBV) cases and deaths has increased substantially to 3221 cases and 1407 deaths2. Finalization of development next steps and potential partnership discussions are ongoing, including with the Emergency Task Force expert group of the African Medicines Agency (equivalent to EMA/FDA and designed to coordinate and harmonize drug approvals across Africa), the Ugandan Ministry of Health and Mbarara University of Science and Technology (MUST), alongside liaison with the Scientific Advisory Committee of the Democratic Republic of Congo (DRC). "The current Bundibugyo ebolavirus (BDBV) outbreak continues to pose a significant public health challenge, despite the extraordinary efforts of healthcare workers and public health authorities," said Professor Pauline Byakika-Kibwika, Vice Chancellor, Mbarara University of Science and Technology (MUST). "The absence of proven therapies for Bundibugyo ebolavirus disease underscores the urgent need to evaluate promising treatment options. Opaganib is a host-directed antiviral with an oral formulation, an established human safety profile, and encouraging preclinical and clinical evidence. Evaluating this candidate during the current outbreak could broaden the therapeutic options available and potentially help improve outcomes for patients affected by Bundibugyo ebolavirus disease." "Opaganib's potential role in the ongoing Ebola outbreak as an add-on therapy to remdesivir is supported by both clinical and non-clinical data. Analogous to an EVD treatment pathway, Phase 3 severe COVID-19 clinical data showed antiviral activity when given with remdesivir, reducing mortality by 70.2% and improving median time to viral RNA clearance with no additional safety signals – with safety and tolerability demonstrated in 470 clinical trial participants," said Gilead Raday, Chief Operating Officer and Head of R&D at RedHill. "Preclinically, United States Army Medical Research Institute of Infectious Diseases (USAMRIID)-funded studies showed opaganib inhibition of EVD in human macrophages, increased survival rates in an opaganib treated group, and a synergistic effect with remdesivir. We will work to ensure that any required supplies of opaganib are rapidly made available to potential partners seeking to fight the deadly effects of Ebola." Opaganib Ebola virus disease (EVD) rationale: Phase 3 clinical antiviral activity (severe COVID-19, analogous to EVD setting) showing3: 70.2% mortality reduction with opaganib given as add-on to best available standard of care (remdesivir + corticosteroids): 6.98% (n=3/43) opaganib + SoC vs. 23.4% (n=11/47) placebo + SoC (nominal p=0.034)) - with no additional safety signals Improved median time to viral RNA clearance by ≥4 days in opaganib-treated patients (median 10 days vs. not reached by Day 14 in placebo, HR 1.34, p=0.043) Demonstrated safety and tolerability profile in 470 clinical trial participants Preclinical EVD activity (United States Army Medical Research Institute of Infectious Diseases (USAMRIID)-funded studies showed4: Opaganib inhibition of EVD in human macrophages Increased survival for opaganib group (one of two animal models5) Synergistic effect when opaganib combined with Gilead Sciences' remdesivir (Veklury®) Opaganib's potential dual mechanism of action against EVD and filovirus-class activity6,7,8: Published literature explicitly validates sphingosine kinases as targets for filovirus inhibition – opaganib is an SPHK2 inhibitor that: May disrupt host-cell components essential for filovirus entry and replication that are conserved across Filoviridae Inhibits PI3K/Akt pathway (required for filovirus entry and membrane trafficking) Suppresses NLRP3 inflammasome, IL-6/TNFα secretion and S1P-mediated vascular permeability (addressing immune dysregulation and vascular leak in viral hemorrhagic fever) Clinical safety data, oral administration and ease of storage and distribution supports clinical evaluation and possible stockpiling requirements to strengthen global infectious disease preparedness and biodefense The data, combined with the U.S. government's Biomedical Advanced Research and Development Authority (BARDA) prior selection of opaganib for joint development & funding as a medical countermeasure (MCM) to treat Ebola virus disease (EBOV), provides additional confidence that opaganib may offer a dual mechanism of action against EVD and filovirus-class activity. Opaganib is in development for multiple oncology, viral, inflammatory and diabetes and obesity-related indications. Opaganib is an investigational new drug. It has not been approved by any regulatory authority and is not available for commercial distribution. About Ebola virus disease: According to the Centers for Disease Control and Prevention (CDC), Ebola disease is a rare and often deadly illness, caused by infection by one of a group of four viruses, known as ebolaviruses. Transmission of the disease is mostly through contact with an infected animal (bat or nonhuman primate) or a sick or dead person infected with an ebolavirus. The course of the illness typically progresses from "dry" symptoms initially (such as fever, aches and pains, and fatigue) and then progresses to "wet" symptoms (such as diarrhea, vomiting and unexplained hemorrhaging, bleeding or bruising) as the person becomes sicker. Currently only Inmazeb™ (atoltivimab, maftivimab, and odesivimab-ebgn, Regeneron Pharmaceuticals, Inc.), a combination of three monoclonal antibodies and Ebanga™ (ansuvimab-zykl, Ridgeback Biotherapeutics, LP), a single monoclonal antibody, are FDA-approved to treat EVD. Both are intravenously administered, direct acting, monoclonal antibody antivirals that bind to glycoproteins on the Ebola virus's surface to prevent the virus from entering a person's cells. There is an urgent need for host-directed small molecule therapies that may be effective against multiple strains of ebolavirus, less likely to be impacted by viral mutation, and that are easy to store, distribute and administer, especially in areas where healthcare services and infrastructures may be sub-optimal. About Opaganib (ABC294640) Opaganib is a proprietary first-in-class investigational, orally administered sphingosine kinase-2 (SPHK2) selective inhibitor drug. Potentially broad-acting, it is in development for multiple oncology, viral, inflammatory, metabolic (diabetes and obesity) and additional indications. Opaganib's suggested mechanism of action, published in the journal Drug Design, Development and Therapy, is host-directed and potentially broad-acting and is expected to maintain its effect against emerging viral variants. Opaganib is thought to work through the inhibition of multiple pathways, the induction of autophagy and apoptosis, and disruption of viral replication, through simultaneous inhibition of three sphingolipid-metabolizing enzymes in human cells (SPHK2, DES1 and GCS). Opaganib has received Orphan Drug designation from the FDA for the treatment of neuroblastoma and cholangiocarcinoma. A Bayer-supported 60-patient placebo-controlled randomized Phase 2 study is ongoing to evaluate the efficacy of opaganib in combination with Bayer's darolutamide in men with metastatic castrate-resistant prostate cancer (mCRPC), testing the potentially enhancing effect of opaganib in patients with a poor prognosis9. Opaganib also has a Phase 1 chemoradiotherapy study protocol ready for FDA-IND submission. Opaganib has demonstrated its safety and tolerability profile in more than 470 participants in multiple clinical studies and expanded access use, including a large global Phase 2/3 study in hospitalized patients with moderate to severe COVID-19, published in Microorganisms. About RedHill Biopharma RedHill Biopharma Ltd. (Nasdaq: RDHL) is a specialty biopharmaceutical company primarily focused on U.S. development and commercialization of drugs for gastrointestinal diseases, infectious diseases and oncology. RedHill promotes the FDA-approved gastrointestinal drug Talicia®, for the treatment of Helicobacter pylori (H. pylori) infection in adults10, with a U.S. co-commercialization agreement with Cumberland Pharmaceuticals (acquired by Apotex Health Corp. July 1, 2026). RedHill's key clinical late-stage development programs include: (i) opaganib (ABC294640), a first-in-class, orally administered sphingosine kinase-2 (SPHK2) selective inhibitor with anti-inflammatory, antiviral, metabolic and anticancer activity, targeting multiple indications with a track record of U.S. government and academic collaborations intended for medical countermeasure development including for EVD, radiation exposure indications such as GI-Acute Radiation Syndrome (GI-ARS), a Phase 2/3 program for hospitalized COVID-19, and an ongoing Phase 2 study in prostate cancer in combination with darolutamide; (ii) RHB-102 (Bekinda), with a planned Phase 2 proof-of-concept study for GLP-1/GIP receptor agonist-associated GI intolerance, positive results from a U.S. Phase 3 study for acute gastroenteritis and gastritis, positive results from a U.S. Phase 2 study for IBS-D and potential UK submission for chemotherapy and radiotherapy induced nausea and vomiting. RHB-102 is partnered with Hyloris Pharmaceuticals (EBR: HYL) for worldwide development and commercialization outside North America; (iii) RHB-204, a next-generation optimized formulation of RHB-104, with a planned Phase 2 study for Crohn's disease (based on RHB-104's positive Phase 3 Crohn's disease study results); and (iv) RHB-107 ( upamostat), an oral broad-acting, host-directed, serine protease inhibitor with potential for pandemic preparedness, including COVID-19 and also targeting multiple cancer and inflammatory gastrointestinal diseases. Visit / X.com/RedHillBio for more information about the Company Forward-Looking Statements This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and may discuss investment opportunities, stock analysis, financial performance, investor relations, and market trends. Such statements may be preceded by the words "intends," "may," "will," "plans," "expects," "anticipates," "projects," "predicts," "estimates," "aims," "believes," "hopes," "potential" or similar words, and include, among others, statements regarding the potential for opaganib to be accepted into Ebola virus disease control programs or, if accepted, the ability to demonstrate its efficacy. Forward-looking statements are based on certain assumptions and are subject to various known and unknown risks and uncertainties, many of which are beyond the Company's control and cannot be predicted or quantified, and consequently, actual results may differ materially from those expressed or implied by such forward-looking statements. Such risks and uncertainties include, without limitation: the risk that opaganib is not accepted into Ebola virus disease control programs, or if accepted, that it does not demonstrate efficacy; the risk that development of RHB-204 for Crohn's disease may not be completed, or if completed may not be approved or may not achieve commercial success; the risk that opaganib is not effective against the indications for which we develop our products; the risk that RHB-102 (Bekinda) does not effectively reduce GLP-1/GIP-related nausea, vomiting and diarrhea; the risk regarding the Company's ability to regain and maintain compliance with Nasdaq's listing requirements, including the minimum bid price requirement; the risk that the addition of new revenue generating products or out-licensing transactions will not occur; the risk that the Company will not receive future milestone payments under its existing agreements or that they will be less than anticipated; the risk of current uncertainty regarding U.S. government research and development funding and that the U.S. government is under no obligation to continue to support development of our products and can cease such support at any time; the risk that acceptance onto the RNCP Product Development Pipeline or other governmental and non-governmental development programs will not guarantee ongoing development or that any such development will not be completed or successful; the risk that the FDA does not agree with the Company's proposed development plans for its programs; the risk that the Company's development programs and studies may not be successful and, even if successful, such studies and results may not be sufficient for regulatory applications, including emergency use or marketing applications, and that additional studies may be required; the risk that the Company will not successfully commercialize its products; as well as risks and uncertainties associated with (i) the initiation, timing, progress and results of the Company's research, manufacturing, pre-clinical studies, clinical trials, and other therapeutic candidate development efforts, and the timing of the commercial launch of its commercial products and ones it may acquire or develop in the future; (ii) the Company's ability to advance its therapeutic candidates into clinical trials or to successfully complete its pre-clinical studies or clinical trials or the development of any necessary commercial companion diagnostics; (iii) the extent and number and type of additional studies that the Company may be required to conduct and the Company's receipt of regulatory approvals for its therapeutic candidates, and the timing of other regulatory filings, approvals and feedback; (iv) the manufacturing, clinical development, commercialization, and market acceptance of the Company's therapeutic candidates and Talicia; (v) the Company's ability to successfully commercialize and promote Talicia; (vi) the Company's ability to establish and maintain corporate collaborations; (vii) the Company's ability to acquire products approved for marketing in the U.S. that achieve commercial success and build its own marketing and commercialization capabilities; (viii) the interpretation of the properties and characteristics of the Company's therapeutic candidates and the results obtained with its therapeutic candidates in research, pre-clinical studies or clinical trials; (ix) the implementation of the Company's business model, strategic plans for its business and therapeutic candidates; (x) the scope of protection the Company is able to establish and maintain for intellectual property rights covering its therapeutic candidates and its ability to operate its business without infringing the intellectual property rights of others; (xi) parties from whom the Company licenses its intellectual property defaulting in their obligations to the Company; (xii) the Company's ability to collect on its judgement against Kukbo; (xiii) estimates of the Company's expenses, future revenues, capital requirements and needs for additional financing; (xiv) the effect of patients suffering adverse experiences using investigative drugs under the Company's Expanded Access Program; (xv) competition from other companies and technologies within the Company's industry; and (xvi) the hiring and employment commencement date of executive managers. More detailed information about the Company and the risk factors that may affect the realization of forward-looking statements is set forth in the Company's filings with the Securities and Exchange Commission (SEC), including the Company's Annual Report on Form 20-F filed with the SEC on April 27, 2026. All forward-looking statements included in this press release are made only as of the date of this press release. The Company assumes no obligation to update any written or oral forward-looking statement, whether as a result of new information, future events or otherwise unless required by law. Company contact: Adi Frish Chief Corporate & Business Development Officer RedHill Biopharma [email protected] Category: R&D 1 Opaganib is an investigational new drug, not available for commercial distribution. 2 Numbers reported 28 July 2026: 3 Neuenschwander FC, Barnett-Griness O, Piconi S, Maor Y, Sprinz E, Assy N, Khmelnitskiy O, Lomakin NV, Goloshchekin BM, Nahorecka E, et al. Effect of Opaganib on Supplemental Oxygen and Mortality in Patients with Severe SARS-CoV-2 Based upon FIO2 Requirements. Microorganisms. 2024; 12(9):1767. 4 Antiviral Activity of Opaganib, a First-in-class Sphingolipid Modulator. Rekha G. Pancha, Raina Kumar, Eric Nguyen, LTC Jeffrey Kugelman, Janet Skerry, Xiaoli Chi, Ashley Mcaleese, Aura R. Garrison, Mark Levitt, Gilead Raday, Patricia Anderson, Sara Johnston, Reza Fathi, LTC Robert Haupt United States Army Medical Research Institute of Infectious Diseases 5 Repeat study showed 20% vehicle survival vs. 10% opaganib; mixed results across the two animal models (including the vehicle only group inter study variability) underscore model variability. 6 Sphingosine Kinases Promote Ebola Virus Infection and Can Be Targeted to Inhibit Filoviruses, Coronaviruses, and Arenaviruses Using Late Endocytic Trafficking to Enter Cells. Corina M. Stewart, Yuxia Bo, Kathy Fu, Mable Chan, Robert Kozak, Kim Yang-Ping Apperley, Geneviève Laroche, Redaet Daniel, André M. Beauchemin, Gary Kobinger, Darwyn Kobasa, and Marceline Côté. ACS Infectious Diseases 2023 9 (5), 1064-1077. DOI: 10.1021/acsinfecdis.2c00416 7 Huang F, Xiujuan Shi PZ, Xingbo Song YS, Sun P, Liu B, Therapeutic potential of the sphingosine kinase 2 inhibitor opaganib, Pharmaceutical Science Advances, Volume 4, 2026, 100125, ISSN 2773-2169, . 8 Smith CD, Maines LW, Keller SN, Katz Ben-Yair V, Fathi R, Plasse TF, Levitt ML. Recent Progress in the Development of Opaganib for the Treatment of Covid-19. Drug Des Devel Ther. 2022 Jul 12;16:2199-2211. doi: 10.2147/DDDT.S367612. PMID: 35855741; PMCID: PMC9288228. 9 10 Talicia® (omeprazole magnesium, amoxicillin and rifabutin) is indicated for the treatment of H. pylori infection in adults. For full prescribing information see: . SOURCE RedHill Biopharma Ltd. 21% more press release views with Request a Demo

Clinical ResultPhase 2Phase 3Drug ApprovalPhase 1

18 Jun 2026

·www.prnewswire.com

RedHill Biopharma Announces Up To $19.4 Million Private Placement

$6 million upfront with up to approximately $13.4 million of potential aggregate gross proceeds upon the exercise in full of warrants TEL AVIV, Israel & RALEIGH, N.C., June 18, 2026 /PRNewswire/ -- RedHill Biopharma Ltd. (Nasdaq: RDHL) ("RedHill" or the "Company"), a specialty biopharmaceutical company, today announced that it has entered into a definitive agreement for the purchase and sale of an aggregate of 8,571,429 American Depositary Shares ("ADSs") (or ADS equivalents in lieu thereof), each ADS representing ten thousand (10,000) ordinary shares of the Company, series A-1 warrants to purchase up to an aggregate of 8,571,429 ADSs and series A-2 warrants to purchase up to an aggregate of 8,571,429 ADSs, at a combined purchase price of $0.70 per ADS (or ADS equivalent in lieu thereof) and accompanying warrants in a private placement. The Series A-1 warrants have an exercise price of $0.86 per ADS, are exercisable immediately and have a term of five years following the Effectiveness Date (as defined below), and the Series A-2 warrants have an exercise price of $0.70 per ADS, are exercisable immediately and have a term of 18 months following the Effectiveness Date. The private placement is expected to close on June 22, 2026, subject to the satisfaction of customary closing conditions. H.C. Wainwright & Co. is acting as the exclusive placement agent for the offering. The gross proceeds to the Company from this offering are expected to be approximately $6 million, before deducting the placement agent's fees and other offering expenses payable by the Company. The potential additional gross proceeds to the Company from the series A-1 warrants and the series A-2 warrants, if fully exercised on a cash basis, will be approximately $13.4 million. No assurance can be given that any of the series warrants will be exercised, or that the Company will receive cash proceeds from the exercise of the series warrants. The Company intends to use a portion of the net proceeds to support a potential strategic product acquisition and the balance for working capital, research and development and general corporate purposes. No definitive acquisition agreement has been executed, and any such transaction would remain subject to completion of definitive documentation, financing and other customary conditions. There can be no assurance that any such transaction will be completed. The securities described above were offered in a private placement under Section 4(a)(2) of the Securities Act of 1933, as amended (the "Securities Act"), and/or Regulation D promulgated thereunder and, along with the ordinary shares of the Company represented by ADSs underlying the warrants, have not been registered under the Securities Act or applicable state securities laws. Accordingly, the securities issued in the private placement and ordinary shares of the Company represented by ADSs underlying the warrants may not be offered or sold in the United States except pursuant to an effective registration statement or an applicable exemption from the registration requirements of the Securities Act and such applicable state securities laws. Pursuant to a registration rights agreement with the investors, the Company has agreed to file a resale registration statement covering the securities described above (such date of effectiveness of the resale registration statement, the "Effectiveness Date"). This press release shall not constitute an offer to sell or a solicitation of an offer to buy these securities, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction. About RedHill Biopharma RedHill Biopharma Ltd. (Nasdaq: RDHL) is a specialty biopharmaceutical company primarily focused on U.S. development and commercialization of drugs for gastrointestinal diseases, infectious diseases and oncology. RedHill promotes the FDA-approved gastrointestinal drug Talicia ®, for the treatment of Helicobacter pylori (H. pylori) infection in adults[1], with a U.S. co-commercialization agreement with Cumberland Pharmaceuticals (Nasdaq: CPIX). RedHill's key clinical late-stage development programs include: (i) opaganib (ABC294640), a first-in-class, orally administered sphingosine kinase-2 (SPHK2) selective inhibitor with anti-inflammatory, antiviral, metabolic and anticancer activity, targeting multiple indications with U.S. government and academic collaborations intended for medical countermeasure development including for Ebola virus disease, radiation exposure indications such as GI-Acute Radiation Syndrome (GI-ARS), a Phase 2/3 program for hospitalized COVID-19, and an ongoing Phase 2 study in prostate cancer in combination with Bayer's darolutamide; (ii) RHB-102 (Bekinda®), with a planned Phase 2 proof-of-concept study for GLP-1/GIP receptor agonist-associated GI intolerance, positive results from a U.S. Phase 3 study for acute gastroenteritis and gastritis, positive results from a U.S. Phase 2 study for IBS-D and potential UK submission for chemotherapy and radiotherapy induced nausea and vomiting. RHB-102 is partnered with Hyloris Pharmaceuticals (EBR: HYL) for worldwide development and commercialization outside North America; (iii) RHB-204, a next-generation optimized formulation of RHB-104, with a planned Phase 2 study for Crohn's disease (based on RHB-104's positive Phase 3 Crohn's disease study results); and (iv) RHB-107 (upamostat), an oral broad-acting, host-directed, serine protease inhibitor with potential for pandemic preparedness, including COVID-19 and also targeting multiple cancer and inflammatory gastrointestinal diseases. More information about the Company is available at / X.com/RedHillBio. Forward Looking Statements This press release contains "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995 and may discuss investment opportunities, stock analysis, financial performance, investor relations, and market trends. Such statements may be preceded by the words "intends," "may," "will," "plans," "expects," "anticipates," "projects," "predicts," "estimates," "aims," "believes," "hopes," "potential" or similar words and include, among others, the consummation of the offering and the satisfaction of customary closing conditions related to the offering, the use of proceeds therefrom, the potential exercise of the series warrants and potential proceeds therefrom, potential acquisition of strategic products, statements regarding the potential submission of Talicia® for UK Marketing Authorisation and any approval thereof and statements regarding the potential effects of Talicia® in the treatment of Helicobacter pylori infection. Forward-looking statements are based on certain assumptions and are subject to various known and unknown risks and uncertainties, many of which are beyond the Company's control and cannot be predicted or quantified, and consequently, actual results may differ materially from those expressed or implied by such forward-looking statements. Such risks and uncertainties include, without limitation: market and other conditions, the risk that the MAA submission for Talicia may not be approved; the risk that the Company will not succeed in its enforcement action against Kukbo, and if successful may not recover all or any of awards granted by the New York Supreme Court; the risk that opaganib does not receive a priority review voucher, marketing exclusivity or accelerated development and review times; the risk that opaganib is not accepted into Ebola virus disease control programs, or if accepted, that it does not demonstrate efficacy; the risk that development of RHB-204 for Crohn's disease may not be completed, or if completed may not be approved or may not achieve commercial success; the risk that opaganib is not effective against the indications for which we develop our products; the risk that RHB-102 (Bekinda) does not effectively reduce GLP-1/GIP-related nausea, vomiting and diarrhea; the risk regarding the Company's ability to regain and maintain compliance with Nasdaq's listing requirements, including the minimum bid price requirement; the risk that the addition of new revenue generating products or out-licensing transactions will not occur; the risk that the Company will not receive future milestone payments under its existing agreements or that they will be less than anticipated; the risk of current uncertainty regarding U.S. government research and development funding and that the U.S. government is under no obligation to continue to support development of our products and can cease such support at any time; the risk that acceptance onto the RNCP Product Development Pipeline or other governmental and non-governmental development programs will not guarantee ongoing development or that any such development will not be completed or successful; the risk that the FDA does not agree with the Company's proposed development plans for its programs; the risk that the Company's development programs and studies may not be successful and, even if successful, such studies and results may not be sufficient for regulatory applications, including emergency use or marketing applications, and that additional studies may be required; the risk that the Company will not successfully commercialize its products; as well as risks and uncertainties associated with (i) the initiation, timing, progress and results of the Company's research, manufacturing, pre-clinical studies, clinical trials, and other therapeutic candidate development efforts, and the timing of the commercial launch of its commercial products and ones it may acquire or develop in the future; (ii) the Company's ability to advance its therapeutic candidates into clinical trials or to successfully complete its pre-clinical studies or clinical trials or the development of any necessary commercial companion diagnostics; (iii) the extent and number and type of additional studies that the Company may be required to conduct and the Company's receipt of regulatory approvals for its therapeutic candidates, and the timing of other regulatory filings, approvals and feedback; (iv) the manufacturing, clinical development, commercialization, and market acceptance of the Company's therapeutic candidates and Talicia; (v) the Company's ability to successfully commercialize and promote Talicia; (vi) the Company's ability to establish and maintain corporate collaborations; (vii) the Company's ability to acquire products approved for marketing in the U.S. that achieve commercial success and build its own marketing and commercialization capabilities; (viii) the interpretation of the properties and characteristics of the Company's therapeutic candidates and the results obtained with its therapeutic candidates in research, pre-clinical studies or clinical trials; (ix) the implementation of the Company's business model, strategic plans for its business and therapeutic candidates; (x) the scope of protection the Company is able to establish and maintain for intellectual property rights covering its therapeutic candidates and its ability to operate its business without infringing the intellectual property rights of others; (xi) parties from whom the Company licenses its intellectual property defaulting in their obligations to the Company; (xii) the Company's ability to collect on its judgment against Kukbo; (xiii) estimates of the Company's expenses, future revenues, capital requirements and needs for additional financing; (xiv) the effect of patients suffering adverse experiences using investigative drugs under the Company's Expanded Access Program; (xv) competition from other companies and technologies within the Company's industry; and (xvi) the hiring and employment commencement date of executive managers. More detailed information about the Company and the risk factors that may affect the realization of forward-looking statements is set forth in the Company's filings with the Securities and Exchange Commission (SEC), including the Company's Annual Report on Form 20-F filed with the SEC on April 27, 2026. All forward-looking statements included in this press release are made only as of the date of this press release. The Company assumes no obligation to update any written or oral forward-looking statement, whether as a result of new information, future events or otherwise unless required by law. Category: Financials [1]Talicia® (omeprazole magnesium, amoxicillin and rifabutin) is indicated for the treatment of H. pylori infection in adults. For full prescribing information see: . Logo - Company contact: Adi Frish Chief Corporate & Business Development Officer RedHill Biopharma [email protected] SOURCE RedHill Biopharma Ltd. 21% more press release views with Request a Demo

Clinical ResultPhase 2

18 Jun 2026

·allsci.com

RedHill raises USD 19.4m to fund acquisition hunt amid cash crunch

Israel-based RedHill Biopharma Ltd. (Nasdaq: RDHL) announced a private placement of ADSs and accompanying warrants with potential gross proceeds of up to USD 19.4 million, structured to support a possible strategic product acquisition and sustain pipeline and commercial operations. The transaction follows a period of sustained cash pressure — RedHill reported a cash balance of USD 4.1 million at year-end 2025 — and reflects continued reliance on equity capital markets since the 2023 divestiture of Movantik. The offering comprises 8,571,429 ADSs at USD 0.70 per ADS, generating USD 6 million in upfront gross proceeds before placement agent fees, and two warrant tranches that if fully exercised would yield up to approximately USD 13.4 million in additional proceeds. Company overview and pipeline RedHill is a specialty biopharmaceutical company with dual headquarters in Tel Aviv, Israel and Raleigh, North Carolina, focused on gastrointestinal diseases, infectious diseases, and oncology. Its commercial asset, Talicia (omeprazole magnesium, amoxicillin and rifabutin), is the FDA-approved leading branded H. pylori therapy prescribed by US gastroenterologists, now co-commercialized through Talicia Holdings Inc., a joint venture with Cumberland Pharmaceuticals (Nasdaq: CPIX). RedHill retains a 70% interest in the venture. The lead pipeline asset is opaganib (ABC294640), an oral, first-in-class sphingosine kinase-2 (SPHK2) selective inhibitor with anti-inflammatory, antiviral, and anticancer activity currently in Phase II paired with Bayer’s darolutamide in metastatic castrate-resistant prostate cancer, among others. RHB-102 (Bekinda), a once-daily bimodal extended-release ondansetron formulation, is currently Phase II stage targeting GLP-1/GIP receptor agonist-associated GI side effects. And RHB-204, a next-generation fixed-dose combination antibiotic targeting MAP-positive Crohn’s disease, is advancing toward a planned Phase II study following positive FDA feedback on its approval pathway. This article was generated with AI assistance and reviewed and edited by the AllSci editorial team Explore more at AllSci News: https://allsci.com/news/ Your email address will not be published. Required fields are marked * Comment * Name * Email * Website Privacy Terms About Us Copyright © 2026. AllSci Corp. All rights reserved.

100 Deals associated with Opaganib

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R&D Status

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Indication	Highest Phase	Country/Location	Organization	Date
COVID-19	Phase 3	United States	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Brazil	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Colombia	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Israel	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Italy	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Mexico	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Peru	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Poland	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	Russia	RedHill Biopharma Ltd.	21 Aug 2020
COVID-19	Phase 3	United Kingdom	RedHill Biopharma Ltd.	21 Aug 2020

Clinical Result

Indication

Phase

Evaluation

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Study	Phase	Population	Analyzed Enrollment	Group	Results	Evaluation	Publication Date


NCT04207255 (Pubmed \| Cancer Med)	Phase 2	Metastatic castration-resistant prostate cancer	60	Abiraterone + Opaganib 500 mg Q 12 h	izwqsdvsmy(ycfkebgcck) = kpukucndlv qmynlsftdr (hasymoomfj, 4 - 35) View more	Negative	01 Apr 2026
				Enzalutamide + Opaganib 500 mg Q 12 h	izwqsdvsmy(ycfkebgcck) = czgnvfrwyw qmynlsftdr (hasymoomfj, 2 - 24) View more
NCT04207255 (CTgov)	Phase 2	Metastatic castration-resistant prostate cancer	69	Opaganib+Abiraterone (Cohort 2: Opaganib With Abiraterone)	ghgqyuvtof = wrhzsuqgri nynvgcjxhj (pzgbxxnttg, ijshqvhuqr - klxljhcugp) View more	-	25 Sep 2024
				Enzalutamide+Opaganib (Cohort 3: Opaganib With Enzalutamide)	ghgqyuvtof = ecuzgoyxpm nynvgcjxhj (pzgbxxnttg, xplydjlrth - tjaknuicuk) View more
NCT04467840 (PRNewswire) Manual	Phase 2/3	COVID-19	251	Opaganib	febsrlvzvs(dlzcgarfir) = jlqdhvqjrg wlpoquwgdb (xbgzqkmegm ) View more	Positive	03 Sep 2024
				Placebo	febsrlvzvs(dlzcgarfir) = bknaqoeqbz wlpoquwgdb (xbgzqkmegm ) View more
NCT04467840 (CTgov)	Phase 2/3	COVID-19 \| Infectious Lung Disorder	475	Opaganib (Opaganib)	lddlhyuecr: Risk Difference (RD) = 3.86 (95% CI, -4.93 to 12.65), P-Value = 0.391 View more	-	19 Oct 2023
				Placebo (Placebo)
NCT04414618 (Pubmed) Manual	Phase 2	COVID-19	42	standard of care+Opaganib	scxiaehrkp(nzyjtpheuw) = xczwwfabiq uopickxqju (whqydwidub ) View more	Positive	11 May 2022
				standard of care+Placebo	scxiaehrkp(nzyjtpheuw) = sbrxgbjppd uopickxqju (whqydwidub ) View more
NCT04414618 (COVID-19, CTgov)	Phase 2	COVID-19	42	Opaganib (Opaganib)	rypavrkjql(iatnvqazhs) = attcujbqrb pztuvqyfxv (tgcntwuair, dxqzkuwdxp - ypkhnhummy) View more	-	21 Mar 2022
				Placebo (Placebo)	rypavrkjql(iatnvqazhs) = ixexsretvq pztuvqyfxv (tgcntwuair, ivhebbteok - xjzvaihzzs) View more
NCT02757326 (ABC-103, CTgov)	Phase 1/2	Relapse multiple myeloma \| Refractory Multiple Myeloma	13	Opaganib (Opaganib)	jkerdyeyaw = flcwfhjexi xjbrfpmwvw (oyivajfoxb, fxccsnwyoz - bgwgvtmffn)	-	18 Jun 2021
				ABC294640 (ABC294640 250 mg BID)	pjycyedsdj = zvlevohkqu vpxldfqjor (etncfnwrrb, smauoazbtg - naoqgenudx) View more
NCT04414618 (PRNewswire) Manual	Phase 2	COVID-19	40	Opaganib	ywueruojcv(onjpyfdron) = lvjqhxffiz kkufbyxbri (kfzpexucoq ) View more	Positive	04 Jan 2021
				Placebo	ywueruojcv(onjpyfdron) = awiarymapc kkufbyxbri (kfzpexucoq ) View more

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