SUL-DUR is an investigational targeted antibiotic for the treatment of infections due to Acinetobacter baumannii-calcoaceticus complex (Acinetobacter). Infections caused by drug-resistant Acinetobacter are serious and life-threatening conditions associated with high morbidity and mortalityⁱ. Carbapenem-resistant Acinetobacter is considered an urgent public health threat by the Centers for Disease Control and Prevention (CDC)ⁱⁱ and a Priority 1 pathogen by the World Health Organization (WHO)ⁱⁱⁱ.

The Committee will review data from studies involving SUL-DUR, including data from the landmark Phase 3 trial evaluating the safety and efficacy of SUL-DUR versus colistin in patients with infections caused by Acinetobacter. In the trial, SUL-DUR demonstrated statistical non-inferiority versus colistin for the primary end point of 28-day all-cause mortality in patients with carbapenem-resistant Acinetobacter infections and a significant difference in clinical cure rates. SUL-DUR also exhibited a favorable safety profile with lower incidence of nephrotoxicity compared to colistin.

The SUL-DUR NDA, filed on September 29, 2022 by Entasis Therapeutics Inc., a wholly owned subsidiary of Innoviva, is currently under Priority Review by the FDA with a Prescription Drug User Fee Act (PDUFA) target action date of May 29, 2023.

About Acinetobacter
Members of the Acinetobacter baumannii-calcoaceticus complex (Acinetobacter) are Gram-negative, opportunistic human pathogens that predominantly infect critically ill patients, often resulting in severe pneumonia and bloodstream infections. They can also infect other body sites, such as the urinary tract and the skin. Acinetobacter is considered a global threat in the healthcare setting due in part to its ability to acquire multidrug resistance. Based on current carbapenem resistance rates, we estimate there are more than 300,000 hospital-treated carbapenem-resistant Acinetobacter infections each year globally for which significant morbidity and mortality exists due to limited treatment options.

About sulbactam-durlobactam (SUL-DUR)
SUL-DUR is an intravenous, or IV, investigational drug that is a combination of sulbactam, an IV β-lactam antibiotic, and durlobactam, a rationally designed broad-spectrum IV β-lactamase inhibitor, or BLI, being developed for the treatment of infections due to Acinetobacter baumannii-calcoaceticus complex. SUL-DUR has been designated a Qualified Infectious Disease Product by the FDA, a designation that aims to spur development of new antibiotics for difficult-to-treat infections.

About Innoviva
Innoviva is a diversified holding company with a portfolio of royalties and other healthcare assets. Innoviva’s royalty portfolio includes respiratory assets partnered with Glaxo Group Limited (“GSK”), including RELVAR^®/BREO^® ELLIPTA^® (fluticasone furoate/ vilanterol, “FF/VI”) and ANORO^® ELLIPTA^® (umeclidinium bromide/ vilanterol, “UMEC/VI”). Under the Long-Acting Beta2 Agonist (“LABA”) Collaboration Agreement, Innoviva is entitled to receive royalties from GSK on sales of RELVAR^®/BREO^® ELLIPTA^® and ANORO^® ELLIPTA^®. Innoviva’s other healthcare assets include infectious disease and hospital assets stemming from acquisitions of Entasis Therapeutics Inc., including its lead asset sulbactam-durlobactam, and La Jolla Pharmaceutical Company, including GIAPREZA^® (angiotensin II), approved to increase blood pressure in adults with septic or other distributive shock and XERAVA^® (eravacycline) for the treatment of complicated intra-abdominal infections in adults.

ANORO^®, RELVAR^® and BREO^® are trademarks of the GSK group of companies.

Forward Looking Statements
This press release contains certain “forward-looking” statements as that term is defined in the Private Securities Litigation Reform Act of 1995 regarding, among other things, statements relating to goals, plans, objectives, and future events. Innoviva intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. The words “anticipate”, “expect”, “goal”, “intend”, “objective”, “opportunity”, “plan”, “potential”, “target” and similar expressions are intended to identify such forward-looking statements. Such forward-looking statements involve substantial risks, uncertainties, and assumptions. These statements are based on the current estimates and assumptions of the management of Innoviva as of the date of this press release and are subject to known and unknown risks, uncertainties, changes in circumstances, assumptions and other factors that may cause the actual results of Innoviva to be materially different from those reflected in the forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, among others, risks related to: expected cost savings; lower than expected future royalty revenue from respiratory products partnered with GSK; the commercialization of RELVAR^®/BREO^® ELLIPTA^®, ANORO^® ELLIPTA^® and, formerly, TRELEGY^® ELLIPTA^® in the jurisdictions in which these products have been approved; the strategies, plans and objectives of Innoviva (including Innoviva’s growth strategy and corporate development initiatives beyond the existing respiratory portfolio); the timing, manner, and amount of potential capital returns to shareholders; the status and timing of clinical studies, data analysis and communication of results; the potential benefits and mechanisms of action of product candidates; expectations for product candidates through development and commercialization; the timing of regulatory approval of product candidates; and projections of revenue, expenses and other financial items; the impact of the novel coronavirus (“COVID-19”). Other risks affecting Innoviva are described under the headings “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” contained in Innoviva’s Annual Report on Form 10-K for the year ended December 31, 2022 and Quarterly Reports on Form 10-Q, which are on file with the Securities and Exchange Commission (“SEC”) and available on the SEC’s website at www.sec.gov. Past performance is not necessarily indicative of future results. No forward-looking statements can be guaranteed, and actual results may differ materially from such statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. The information in this press release is provided only as of the date hereof, and Innoviva assumes no obligation to update its forward-looking statements on account of new information, future events or otherwise, except as required by law.

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