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In the near term, Basilea Pharmaceutica will get $29 million to develop its antifungals fosmanogepix and BAL2062. Basilea Pharmaceutica’s work developing new antifungals has received a significant boost from the U.S. Department of Health and Human Services, which has signed off on up to $268 million of funding to the Swiss company over more than a decade.The agreement with the Biomedical Advanced Research and Development Authority (BARDA) will see the funding spread over up to 12 years to “support the development of designated novel, first-in-class antifungals and antibacterials in Basilea’s portfolio,” the company explained in a Sept. 19 release. Receiving the full $268 million will be dependent on Basilea hitting a series of clinical and regulatory milestones as well as BARDA choosing to extend the contract.In the near term, the company will get $29 million to develop its antifungals fosmanogepix and BAL2062. The biotech is lining up fosmanogepix—which originates at Amplyx Pharmaceuticals but which Basilea acquired from Pfizer last year—for a phase 3 trial in invasive yeast infections, while BAL2062—which was bought from Gravitas Therapeutics—has completed a phase 1 safety study and is being aimed at molds like Aspergillus.The nature of the funding agreement means BARDA and Basilea can together decide which candidates to move in and out of the remit “based on product performance, technical risk, and programmatic need.” Basilea’s relationship with BARDA stretches back to 2013 when the agency committed $89 million in funding toward the antibiotic BAL30072—although the biotech went on to scrap the candidate three years later.Basilea CEO David Veitch said today’s agreement “will be leveraging our strong portfolio and the capabilities of our organization to develop urgently needed novel antifungals and antibacterials.”“We believe this long-term partnership will also lead to the successful implementation of our strategy to become a leading anti-infectives company,” Veitch added.Basilea currently markets Cresemba for invasive fungal infections and Zevtera for bacterial infections. The low return on investment means many of the biggest biopharmas have given up working on new antifungals or antibiotics in recent years—although GSK in particular has continued to sign deals and post encouraging clinical results against infections like gonorrhea.Meanwhile, Basilea has swum against the tide, pivoting away from cancer toward anti-infectives last year.

Initial funding of USD 29 million to support development of Basilea’s clinical stage first-in-class antifungals, fosmanogepix and BAL2062Multi-year Other Transaction Agreement (OTA) allows for potential funding of up to approximately USD 268 million to develop antifungal and antibacterial assets Increasing FY 2024 financial guidance on total revenue, operating result and net profit Ad hoc announcement pursuant to Art. 53 LR Allschwil, Switzerland, September 19, 2024 Basilea Pharmaceutica Ltd, Allschwil (SIX: BSLN), a commercial-stage biopharmaceutical company committed to meeting the needs of patients with severe bacterial and fungal infections, announced today that the Biomedical Advanced Research and Development Authority (BARDA), part of the Administration for Strategic Preparedness and Response (ASPR) within the US Department of Health and Human Services, has awarded Basilea an Other Transaction Agreement (OTA), under OTA number 75A50124C00033. As a result, Basilea increases its financial guidance for the full year 2024. David Veitch, Chief Executive Officer of Basilea, said: “Basilea has been working with BARDA since 2013. In continuing this partnership through an OTA, we will be leveraging our strong portfolio and the capabilities of our organization to develop urgently needed novel antifungals and antibacterials. We believe this long-term partnership will also lead to the successful implementation of our strategy to become a leading anti-infectives company.” Under the terms of the OTA, BARDA will support the development of designated novel, first-in-class antifungals and antibacterials in Basilea’s portfolio with a total potential non-dilutive funding of up to approximately USD 268 million over up to twelve years, if all additional options to extend the contract are exercised by BARDA upon successful completion of pre-defined milestones, including clinical and regulatory activities. With the signing of the OTA, initial BARDA funds of USD 29 million have been committed to support the development of the antifungals fosmanogepix and BAL2062. BARDA’s financial contribution is assumed to be about 60% of the total costs over the term of the OTA. Under the OTA, BARDA and Basilea can jointly decide to move candidates into and out of the portfolio based on product performance, technical risk, and programmatic need. This flexibility results in significant time, effort, and cost savings to both partners. Increasing full-year (FY) 2024 financial guidance Reflecting the near-term impact of the OTA, Basilea updates its financial guidance for the full year 2024. Development costs under the OTA will continue to be reported under research and development expenses. The BARDA reimbursements will be reported under other revenue, resulting in increased total revenue and unchanged operating expenses. Also, additional deferred taxes are recognized due to the expected positive effect of the OTA on the company's medium-term financial outlook. This results in a higher operating result and net profit for FY 2024. (In CHF million) FY 2024e(new) FY 2024e(previous) FY 2023 Cresemba and Zevtera-related revenue ~190 ~190 150.3 of which royalty income ~92 ~92 78.9 Total revenue ~203 ~196 157.6 Cost of products sold ~40 ~40 26.8 Operating expenses ~120 ~120 111.7 Operating result ~43 ~36 19.2 Net profit ~60 ~42 10.5 About fosmanogepix Fosmanogepix is a clinical-stage broad-spectrum antifungal. It has a novel mechanism of action and its active moiety has shown activity against common species of Candida and Aspergillus, including multi-drug-resistant strains, such as Candida auris and Candida glabrata, as well as rare difficult-to-treat molds including Fusarium spp., Scedosporium spp., and some fungi from the Mucorales order.1 Fosmanogepix is available in intravenous and oral formulations and has been evaluated for efficacy and safety in a phase 1 / phase 2 program, including three open-label phase 2 studies for the treatment of Candidemia, including Candida auris, and invasive mold infections.1, 2, 3, 4 Basilea will initiate shortly a double-blind non-inferiority phase 3 study in invasive yeast infections.5 Fosmanogepix has received Fast Track and Orphan Drug designations from the US Food and Drug Administration for seven separate indications, and is designated as a Qualified Infectious Disease Product (QIDP) for the treatment of four indications. About BAL2062 BAL2062 is a first-in-class antifungal, derived from a natural product, and has demonstrated fungicidal activity against clinically important molds such as Aspergillus spp., including azole-resistant strains.6 Safety and tolerability have been demonstrated in a previously completed phase 1 study with single and multiple ascending intravenous (i.v.) doses.7 The drug candidate has Qualified Infectious Disease Product (QIDP), Orphan Drug and Fast Track designation from the US Food & Drug Administration (FDA) for invasive aspergillosis. About invasive mold infections Invasive aspergillosis and invasive infections with rare molds (e.g., Fusarium spp., Scedosporium spp., and Mucorales fungi) are life-threatening infections that predominantly affect immunocompromised patients, including patients with hematologic malignancies (blood cancer), transplant patients, or patients with other immunodeficiency disorders. These infections are associated with high morbidity and mortality.8, 9 About invasive candidiasis Invasive candidiasis, including deep-seated tissue candidiasis and candidemia, is an increasingly important nosocomial infection, especially in patients hospitalized in intensive care units. Candida species are ranked as the fourth main cause of bloodstream infections in hospitals in the US.10 The prognosis of invasive candidiasis remains difficult, with a reported mortality rate for invasive candidiasis as high as 40%, even when patients receive antifungal therapy.11 About Basilea Basilea is a commercial-stage biopharmaceutical company founded in 2000 and headquartered in Switzerland. We are committed to discovering, developing and commercializing innovative drugs to meet the needs of patients with severe bacterial and fungal infections. We have successfully launched two hospital brands, Cresemba for the treatment of invasive fungal infections and Zevtera for the treatment of bacterial infections. In addition, we have preclinical and clinical anti-infective assets in our portfolio. Basilea is listed on the SIX Swiss Exchange (SIX: BSLN). Please visit basilea.com. Disclaimer This communication expressly or implicitly contains certain forward-looking statements, such as "believe", "assume", "expect", "forecast", "project", "may", "could", "might", "will" or similar expressions concerning Basilea Pharmaceutica Ltd, Allschwil and its business, including with respect to the progress, timing and completion of research, development and clinical studies for product candidates. Such statements involve certain known and unknown risks, uncertainties and other factors, which could cause the actual results, financial condition, performance or achievements of Basilea Pharmaceutica Ltd, Allschwil to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. Basilea Pharmaceutica Ltd, Allschwil is providing this communication as of this date and does not undertake to update any forward-looking statements contained herein as a result of new information, future events or otherwise. For further information, please contact: Peer Nils Schröder, PhD Head of Corporate Communications & Investor RelationsBasilea Pharmaceutica International Ltd, Allschwil Hegenheimermattweg 167b4123 AllschwilSwitzerland Phone +41 61 606 1102 E-mail media_relations@basilea.com investor_relations@basilea.com This ad hoc announcement can be downloaded from www.basilea.com. References K. J. Shaw, A. S. Ibrahim. Fosmanogepix:A Review of the First-in-Class Broad Spectrum Agent for the Treatment of Invasive Fungal Infections. Journal of Fungi (Basel) 2020 (6), 239M. R. Hodges, E. Ople, P. Wedel et al. Safety and Pharmacokinetics of Intravenous and Oral Fosmanogepix, a First-in-Class Antifungal Agent, in Healthy Volunteers. Antimicrobial Agents and Chemotherapy 2023 (67), e01623-22J. A. Vazquez, P. G. Pappas, K. Boffard et al. Clinical Efficacy and Safety of a Novel Antifungal, Fosmanogepix, in Patients with Candidemia Caused by Candida auris: Results from a Phase 2 Trial. Antimicrobial Agents and Chemotherapy2023 (67), e01419-22P. G. Pappas, J. A. Vazquez, I. Oren et al. Clinical safety and efficacy of novel antifungal, fosmanogepix, for the treatment of candidaemia: results from a Phase 2 trial. Journal of Antimicrobial Chemotherapy 2023 (78), 2471-2480ClinicalTrials.gov identifier NCT05421858K. J. Shaw. GR-2397: Review of the Novel Siderophore-like Antifungal Agent for the Treatment of Invasive Aspergillosis. Journal of Fungi (Basel) 2022 (8), 909ClinicalTrials.gov identifier NCT02956499: M. P. Mammen, D. Armas, F. H. Hughes et al. First-in-Human Phase 1 Study To Assess Safety, Tolerability, and Pharmacokinetics of a Novel Antifungal Drug, VL-2397, in Healthy Adults. Antimicrobial Agents and Chemotherapy 2019 (63), e00969-19J. Cadena, G. R. Thompson 3rd, T. F..Patterson. Aspergillosis: Epidemiology, Diagnosis, and Treatment. Infectious Disease Clinics of North America 2021 (35), 415-434M. Slavin, S. van Hal, T. C. Sorrell et al. Invasive infections due to filamentous fungi other than Aspergillus: epidemiology and determinants of mortality. Clinical Microbiology and Infection 2015 (21), 490.e1-490.e10Candidemia (Blood Infection) and Other Candida Infections. 2019 Factsheet by the American Thoracic Society: https://www.thoracic.org/patients/patient-resources/resources/candidemia.pdf (Accessed: September 18, 2024)B. J. Kullberg, M. C. Arendrup. Invasive Candidiasis. The New England Journal of Medicine 2015 (373), 1445-1456 Attachment Press release (PDF)