GlobeNewswire Inc | Dec 16, 2020 08:30AM EST

December 16, 2020

CAMBRIDGE, Mass., Dec. 16, 2020 (GLOBE NEWSWIRE) -- Spero Therapeutics, Inc.(Nasdaq: SPRO), a multi-asset clinical-stage biopharmaceutical company focused on identifying, developing and commercializing treatments in high unmet need areas involving multi-drug resistant bacterial infections and rare diseases, today announced that it has been selected for addition to the NASDAQ Biotechnology Index (Nasdaq: NBI), effective prior to market open on Monday, December 21, 2020.

The NBI is designed to track the performance of a set of securities listed on the NASDAQ Stock Market (NASDAQ) that are classified as either biotechnology or pharmaceutical according to the Industry Classification Benchmark. The NBI is re-ranked each year and is calculated under a modified capitalization-weighted methodology. Additionally, the NBI forms the basis for a number of Exchange Traded Funds (ETFs), including the iShares NASDAQ Biotechnology ETF (Nasdaq: IBB). More information about the NBI, including eligibility criteria, can be found at https://indexes.nasdaqomx.com/Index/Overview/NBI.

AboutSperoTherapeuticsSpero Therapeutics, Inc.is a multi-asset, clinical-stage biopharmaceutical company focused on identifying, developing and commercializing novel treatments for multi-drug-resistant (MDR) bacterial infections and rare diseases.

Speros lead product candidate, tebipenem HBr (tebipenem pivoxil hydrobromide; formerly SPR994), is being developed as the first oral carbapenem antibiotic for use in complicated urinary tract infections (cUTI) and acute pyelonephritis (AP). InSeptember 2020, Spero announced positive top-line results from its Phase 3 ADAPT-PO clinical trial of tebipenem HBr in cUTI and AP. Spero is also advancing SPR720, its novel oral therapy product candidate being developed for the treatment of rare, orphan pulmonary disease caused by non-tuberculous mycobacterial (NTM) infections. In December 2020, Spero announced the initiation of its Phase 2a clinical trial in patients with NTM pulmonary disease.

Spero also has an IV-administered next generation polymyxin product candidate, SPR206, developed from its potentiator platform that is being developed to treat MDR Gram-negative infections in the hospital setting.

For more information, visit https://sperotherapeutics.com.

Spero Investor and Media Contact:SharonKlahreVice President, Investor Relations857-242-1547IR@sperotherapeutics.com