Shionogi Continues Global Commitment to Advances in Infectious Disease with Key Data Presentations from Its Expanding Product Portfolio at IDWeek 2024

Company Continues Innovating After More than 60 Years in Infectious Disease and Plans for its Strongest IDWeek Presence in History

Florham Park, NJ, September 4, 2024 - Shionogi Inc., the United States subsidiary of Shionogi & Co., Ltd., (Head Office: Osaka, Japan; Chief Executive Officer: Isao Teshirogi, Ph.D.) will have 22 scientific presentations across the company's infectious disease portfolio at IDWeek 2024 (October 16-19, 2024) in Los Angeles, California.

Key among Shionogi's 13 data presentations for Fetroja® (cefiderocol) will be a new real-world evidence study including approximately 1,000 patients treated with cefiderocol from across the U.S. and Europe. This trial, known as PROVE, is the largest study to evaluate cefiderocol use in hospitalized patients with serious Gram-negative infections, the majority of whom were resistant to carbapenem antibiotics.

Notably, Shionogi will have two oral presentations featuring nonclinical data evaluating cefiderocol activity against some of the most difficult-to-treat bacterial strains that were resistant to antibiotics, alone and in combination with xeruborbactam, an investigational beta-lactamase inhibitor that became part of the Shionogi pipeline with the acquisition of Qpex Biopharma, Inc. (hereafter "Qpex") by Shionogi Inc. in 2023.

"Here in the U.S., a core focus of our work includes continuing to evaluate real-world outcomes associated with the use of our antibiotic for the treatment of certain Gram-negative infections and ensuring we're meeting the educational and practical needs of our customers and their patients," said Nate McCutcheon, President and Chief Executive Officer, Shionogi Inc. "We're proud to make this important medication available and we also recognize that ongoing innovation is critical in infectious disease. That's why we recently announced plans to expand our global infectious disease and antimicrobial research operations in the U.S. through Qpex with the establishment of our first U.S.-based discovery laboratory in San Diego."

Shionogi is honored to announce that Michael N. Dudley, PharmD, President and CEO of Qpex will deliver the keynote address at the Society of Infectious Diseases Pharmacists (SIDP) Annual Meeting, taking place in conjunction with IDWeek.

In addition to numerous scientific presentations at IDWeek, Shionogi will once again enable the infectious disease community to join the fight and take a stand against the global public health threat of antimicrobial resistance (AMR) with a new version of its award-winning AMR Warrior experience. All visitors to Shionogi's Booth #322 will have the opportunity to create their own AMR Warrior and use the image to spread awareness amongst their own networks and communities.

Shionogi's presence at IDWeek will also include a sponsored Learning Lounge on Friday, October 18, at 10:15 AM PT, featuring Thomas Lodise, PharmD, PhD, Professor at the Albany College of Pharmacy and Health Sciences, entitled "Fetroja® (cefiderocol): An Overview of In Vitro, Clinical, and Real-world Data."

Summary of Presentations

Cefiderocol data presentations at IDWeek will include:

• Oral #513: Cefiderocol Retains in vitro Activity Against Enterobacterales Non-Susceptible to beta-lactam-beta-lactamase Inhibitor Combinations
• Poster #650: In vitro Activity of Cefiderocol and Comparator Agents Against Global Enterobacterales Isolates from Hospitalized Patients with Pneumonia Collected as Part of the SENTRY Surveillance Program (2020-2022)
• Poster #1099: Correlation Analysis of Cefiderocol in vitro Activity and in vivo Efficacy Against Acinetobacter baumannii Strains with Difficult-to-Read MIC Endpoints
• Poster #1100: Activity of Cefiderocol and Comparator Agents Against Global Isolates of Stenotrophomonas maltophilia from the SENTRY Antimicrobial Surveillance Program (2020-2023)
• Poster #1360: Activity of Cefiderocol Against Carbapenem Non-susceptible Enterobacterales, Including Molecularly Characterized Multidrug-resistant Clinical Isolates, Causing Infections in United States Hospitals (2020-2023)
• Poster #1361: Cefiderocol Activity Against Pseudomonas aeruginosa, Including Resistant Subsets and Isolates Carrying Carbapenemase beta-lactamase Genes, from United States Hospitals (2020-2023)
• Poster #1362: Cefiderocol Activity Against Carbapenem-resistant Acinetobacter baumannii-calcoaceticus complex, Including Molecularly Characterized Clinical Isolates, Causing Infections in United States Hospitals (2020-2023)
• Poster #1363: Cefiderocol Activity Against Clinical Enterobacterales Isolates Carrying Metallo-beta-lactamase Genes in United States and European Hospitals (2020-2023)
• Poster #1364: Cefiderocol Activity Against Pseudomonas aeruginosa Clinical Isolates Carrying Metallo-beta-lactamase Genes in United States and European Hospitals (2020-2023)
• Poster #1472: Cefiderocol Remains Highly Active Against Carbapenemase-Producing Enterobacterales
• Poster #1475: Real-World Effectiveness and Safety of Cefiderocol in the Treatment of Patients with Serious Gram-negative Bacterial Infections: Results of the PROVE Chart Review Study
• Poster #1484: In vitro Activity of Cefiderocol and Comparator Agents Against Non-fermentative Gram-negative Bacilli Isolated from Patients Hospitalized with Pneumonia as part of the SENTRY Global Surveillance Program (2020-2022)
• Poster #1530: Evaluation of Phenotypic Cross-Resistance Between Cefiderocol and beta-lactam/beta-lactamase Inhibitor Combinations Against Pseudomonas aeruginosa Isolates from US Medical Centers

Xeruborbactam data presentations at IDWeek will include:

• Oral #514: The Impact of Xeruborbactam on in vitro Activity of Cefiderocol Against a Panel of Acinetobacter baumannii Enriched in Isolates with Reduced Cefiderocol Susceptibility
• Poster #1110: The Impact of Xeruborbactam on in vitro Activity of Cefiderocol Against a Panel of Enterobacterales Enriched with Isolates with Reduced Cefiderocol Susceptibility

For Full Prescribing Information for Fetroja® (cefiderocol), including approved Indications and Safety Information, please visit https://www.shionogi.com/content/dam/shionogi/si/products/pdf/fetroja.pdf.

Shionogi's scientific contributions at IDWeek will also include seven poster presentations featuring clinical, nonclinical and real-world evidence from its COVID-19 franchise. For more information, including a complete list of abstracts, please visit https://idweek.org/program/.

IDWeek attendees can learn more about Shionogi at Booth #322.

About Shionogi in Infectious Disease

Since 1953, Shionogi has been a leader in infectious disease discovery and commercialization. Our R&D story extends beyond antibiotics to include novel medications for HIV and influenza. Today, our global pipeline includes investigational agents developed to address global health challenges including antimicrobial resistance, COVID-19, influenza, rare fungal diseases and respiratory syncytial virus.

As part of our commitment to addressing unmet medical needs, Shionogi is partnering with several non-governmental organizations to increase equitable access to our medications worldwide. Shionogi has a landmark license and technology transfer agreement for cefiderocol with Global Antibiotic Research and Development Partnership (GARDP) and a collaboration agreement with the Clinton Health Access Initiative (CHAI) to transform the landscape of access to antibiotics in many low-income countries, most lower middle- and upper middle-income countries, and select high-income countries.

About Shionogi Inc.

Shionogi Inc. is a U.S. subsidiary of Shionogi & Co., Ltd., a Japanese research-driven pharmaceutical company committed to developing innovative medicines that address unmet medical needs for people worldwide. Since 1878, we have been harnessing the full potential of science to address global health challenges. Over the past six decades, we have discovered several novel antibiotics and medications for HIV and influenza. Today, we've focused on developing antibiotics for infections due to serious Gram-negative bacteria and antivirals for COVID-19. In addition to infectious disease, we are also advancing rare disease clinical programs in Fragile X syndrome and Pompe disease. Learn more at Shionogi.com.

About Qpex Biopharma Inc., a Shionogi Group Company

Qpex Biopharma, Inc. is a resistance-focused infectious disease company on a mission to make both a dramatic and sustainable improvement in patient care across both inpatient and outpatient settings. Advancing a robust portfolio of best-in-class, clinical-stage products, the company's lead program is based on xeruborbactam, an investigational beta-lactamase inhibitor discovered by Qpex scientists. For more information, please visit www.qpexbio.com.

Forward-Looking Statements

This announcement contains forward-looking statements. These statements are based on expectations in light of the information currently available, assumptions that are subject to risks and uncertainties which could cause actual results to differ materially from these statements. Risks and uncertainties include general domestic and international economic conditions such as general industry and market conditions, and changes of interest rate and currency exchange rate. These risks and uncertainties particularly apply with respect to product-related forward-looking statements. Product risks and uncertainties include, but are not limited to, completion and discontinuation of clinical trials; obtaining regulatory approvals; claims and concerns about product safety and efficacy; technological advances; adverse outcome of important litigation; domestic and foreign healthcare reforms and changes of laws and regulations. Also for existing products, there are manufacturing and marketing risks, which include, but are not limited to, inability to build production capacity to meet demand, lack of availability of raw materials and entry of competitive products. The company disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise.

For Further Information, Contact:

SHIONOGI Website Inquiry Form: https://www.shionogi.com/global/en/contact.html

U.S. Media: [email protected]