SPERO THERAPEUTICS INC
SPRONASDAQTrading Snapshot
- Day Range
- $1.18 β $1.22
- 52-Week Range
- $1.08 β $3.08
- Volume
- $2.03B
- Avg Volume
- $1.51B
- Shares Outstanding
- 57.9M
- Next Earnings
- Dec 13, 2026
Fundamentals Snapshot
- Annual Revenue
- $60M
- Last Q Revenue
- $16M
- P/E Ratio
- 8.6
- P/S Ratio
- 1.6x
- EPS (TTM)
- $0.13
- Dividend Yield
- 0.00%
- Dilution (1yr)
- +9.9%
Why Investors Own SPRO
- βHigh-growth profile β revenue up +40.5% YoY with expanding US Equity exposure.
- βHealthy economics β 43% gross margin and 7% free-cash-flow margin.
- βNew products and segments could unlock additional revenue streams.
Execution delays, intensifying competition, and valuation compression if growth decelerates.
SPERO THERAPEUTICS INC
SPROAbout SPERO THERAPEUTICS INC
Spero Therapeutics, Inc. is a biopharmaceutical firm in the clinical development stage, primarily focused on discovering, advancing, and commercializing innovative treatments for multi-drug resistant (MDR) bacterial infections and rare diseases within the United States. The company's pipeline includes several key therapeutic candidates: tebipenem pivoxil hydrobromide (HBr), an oral carbapenem-class antibiotic designed to address complicated urinary tract infections (cUTIs), including pyelonephritis, in adult patients. SPR206, an intravenously administered agent specifically developed to combat MDR Gram-negative bacterial infections in hospital environments. SPR720, an oral antibiotic targeting non-tuberculous mycobacterial (NTM) pulmonary disease. Spero Therapeutics has also forged several strategic alliances: A licensing agreement with Meiji Seika Pharma Co., Ltd. supports the ongoing development of tebipenem HBr. A separate licensing deal with Everest Medicines grants rights for the development, manufacturing, and commercialization of SPR206 across Greater China, South Korea, and various Southeast Asian nations. The company collaborates with the Bill & Melinda Gates Medical Research Institute to advance SPR720 for treating lung infections caused by Mycobacterium tuberculosis. Furthermore, a licensing agreement with Vertex Pharmaceuticals Incorporated covers patents associated with SPR720 and its active metabolite, SPR719. Founded in 2013, Spero Therapeutics maintains its corporate headquarters in Cambridge, Massachusetts.
Otter Score Breakdown
How it's scoredFive components, each rated 1β5β and equally weighted (20%), averaged to a 0β100 score:π Quality β gross marginπ Growth β revenue YoYβοΈ Valuation β P/S ratioβ‘ Momentum β 30-day price changeπ§ Dilution β 1-yr share issuance (buybacks score higher)Analyst Ratings
βLatest News & Updates

Spero Therapeutics Announces Inducement Grant Under Nasdaq Listing Rule 5635(c)(4)
CAMBRIDGE, Mass., Sept. 03, 2026 (GLOBE NEWSWIRE) -- Spero Therapeutics, Inc. (Nasdaq: SPRO), a clinical-stage biopharmaceutical company focused on advancing next-generation medicines in immunology and inflammation, toda

Spero Therapeutics to Present at H.C. Wainwright 28th Annual Global Investment Conference
CAMBRIDGE, Mass., Sept. 02, 2026 (GLOBE NEWSWIRE) -- Spero Therapeutics, Inc. (Nasdaq: SPRO), a clinical-stage biopharmaceutical company focused on advancing next-generation medicines in immunology and inflammation, toda

Spero Therapeutics, Inc. (SPRO) Q2 2026 Earnings Call Transcript
Spero Therapeutics, Inc. (SPRO) Q2 2026 Earnings Call Transcript

Spero Therapeutics Q2 Earnings Call Highlights
Spero Therapeutics NASDAQ: SPRO used its second-quarter update to outline a strategic shift toward immune-mediated diseases, supported by the FDA approval of Utebzi and a new licensing agreement for SP001, an antibody ca

Spero Therapeutics Announces Second Quarter 2026 Operating Results and Provides Business Update
CAMBRIDGE, Mass., Aug. 12, 2026 (GLOBE NEWSWIRE) -- Spero Therapeutics, Inc. (Nasdaq: SPRO), a clinical-stage biopharmaceutical company focused on advancing next-generation medicines in immunology and inflammation, today

Spero Therapeutics to Report Second Quarter 2026 Financial Results and Provide Business Update on August 12, 2026
CAMBRIDGE, Mass., Aug. 04, 2026 (GLOBE NEWSWIRE) -- Spero Therapeutics, Inc. (Nasdaq: SPRO), a clinical-stage biopharmaceutical company focused on advancing next-generation medicines in immunology and inflammation, today