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Spero Therapeutics Inc (SPRO)

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Upturn Advisory Summary
01/09/2026: SPRO (4-star) is a STRONG-BUY. BUY since 63 days. Simulated Profits (13.33%). Updated daily EoD!
1 Year Target Price $4
1 Year Target Price $4
| 0 | Strong Buy |
| 1 | Buy |
| 2 | Hold |
| 0 | Sell |
| 0 | Strong Sell |
Analysis of Past Performance
Type Stock | Historic Profit 50.35% | Avg. Invested days 56 | Today’s Advisory Strong Buy |
Upturn Star Rating ![]() | Upturn Advisory Performance | Stock Returns Performance |
Key Highlights
Company Size Small-Cap Stock | Market Capitalization 144.79M USD | Price to earnings Ratio - | 1Y Target Price 4 |
Price to earnings Ratio - | 1Y Target Price 4 | ||
Volume (30-day avg) 3 | Beta 1.46 | 52 Weeks Range 0.51 - 3.22 | Updated Date 01/9/2026 |
52 Weeks Range 0.51 - 3.22 | Updated Date 01/9/2026 | ||
Dividends yield (FY) - | Basic EPS (TTM) -0.79 |
Analyzing Revenue: Products, Geography and Growth
Revenue by Products
Earnings Date
Report Date - | When - | Estimate - | Actual - |
Profitability
Profit Margin -108.11% | Operating Margin (TTM) -134.68% |
Management Effectiveness
Return on Assets (TTM) -29.77% | Return on Equity (TTM) -95.3% |
Valuation
Trailing PE - | Forward PE - | Enterprise Value 99526988 | Price to Sales(TTM) 3.57 |
Enterprise Value 99526988 | Price to Sales(TTM) 3.57 | ||
Enterprise Value to Revenue 3.39 | Enterprise Value to EBITDA 0.75 | Shares Outstanding 56339295 | Shares Floating 46006105 |
Shares Outstanding 56339295 | Shares Floating 46006105 | ||
Percent Insiders 22.93 | Percent Institutions 16.09 |
Upturn AI SWOT
Spero Therapeutics Inc

Company Overview
History and Background
Spero Therapeutics Inc. was founded in 2013 with the mission to develop novel antibiotics to address the growing threat of antibiotic-resistant bacterial infections. A significant milestone was its initial public offering (IPO) in 2017. The company has evolved by advancing its pipeline candidates through clinical trials and strategic partnerships.
Core Business Areas
- Antibiotic Development: Spero Therapeutics focuses on discovering and developing novel antimicrobial agents to combat challenging bacterial infections, particularly those resistant to existing therapies.
- Drug Discovery and Development Platform: The company leverages its proprietary platform to identify and optimize novel drug candidates with unique mechanisms of action.
Leadership and Structure
Spero Therapeutics operates with a management team comprising experienced professionals in the biotechnology and pharmaceutical sectors. The exact structure would detail departments like Research & Development, Clinical Operations, Regulatory Affairs, and Business Development.
Top Products and Market Share
Key Offerings
- Product Name 1: Tebipenem HBr (SPR707): Tebipenem HBr is an orally administered carbapenem antibiotic that targets difficult-to-treat Gram-negative bacterial infections, including those caused by multidrug-resistant pathogens. Competitors in this space include companies developing other novel antibiotics for resistant infections. Market share data is not publicly available as it is an investigational drug.
- Product Name 2: SPR742: SPR742 is an investigational oral quinolone antibiotic designed for the treatment of bacterial infections, including community-acquired bacterial pneumonia. It aims to overcome resistance mechanisms that affect existing quinolones. Competitors are other pharmaceutical companies developing new antibiotics for respiratory infections. Market share data is not publicly available as it is an investigational drug.
Market Dynamics
Industry Overview
The infectious disease market, particularly for novel antibiotics, is characterized by significant unmet medical needs due to rising antimicrobial resistance. However, it faces economic challenges related to development costs, reimbursement, and market exclusivity compared to other therapeutic areas. The industry is heavily regulated and requires extensive clinical trials.
Positioning
Spero Therapeutics is positioned as a biotech company focused on addressing the critical need for new antibiotics against multidrug-resistant bacteria. Its competitive advantage lies in its pipeline of novel candidates with distinct mechanisms of action designed to overcome existing resistance. However, its positioning is still in the development phase, awaiting market approval for its lead candidates.
Total Addressable Market (TAM)
The global market for antibiotics is substantial, with the market for treatments of drug-resistant infections representing a significant and growing segment. While precise TAM figures for Spero's specific target indications can vary, it is in the billions of dollars globally. Spero Therapeutics is positioned to capture a portion of this TAM with its innovative treatments, provided successful clinical development and commercialization.
Upturn SWOT Analysis
Strengths
- Novel pipeline targeting urgent unmet medical needs.
- Proprietary drug discovery platform.
- Experienced management team in drug development.
- Potential for significant impact in the fight against antibiotic resistance.
Weaknesses
- Early-stage development for most pipeline assets.
- High R&D costs and long development timelines.
- Dependence on regulatory approvals.
- Limited commercial track record as a development-stage company.
Opportunities
- Growing global concern over antibiotic resistance.
- Government and private funding initiatives for antibiotic development.
- Potential for strategic partnerships and collaborations.
- Expansion into new therapeutic areas or indications.
Threats
- High failure rate in clinical trials.
- Intense competition from other biotech and pharmaceutical companies.
- Challenges in antibiotic market economics and reimbursement.
- Emergence of new resistance mechanisms.
Competitors and Market Share
Key Competitors
- Merck & Co., Inc. (MRK)
- Pfizer Inc. (PFE)
- Gilead Sciences, Inc. (GILD)
Competitive Landscape
Spero Therapeutics' competitive advantages lie in its specialized focus on novel mechanisms against resistant pathogens. However, it faces disadvantages in terms of scale, resources, and established market presence compared to large pharmaceutical giants like Merck and Pfizer, which have broader infectious disease portfolios and extensive commercial infrastructure. Gilead also has a significant presence in antivirals and other infectious diseases.
Growth Trajectory and Initiatives
Historical Growth: Historically, Spero Therapeutics' growth has been characterized by advancing its pipeline through preclinical and clinical development stages, securing funding through equity offerings, and establishing strategic collaborations. Revenue growth has been minimal or non-existent due to its development-stage status.
Future Projections: Future projections are heavily dependent on the success of its clinical trials for tebipenem HBr and SPR742, and potential regulatory approvals. Analyst estimates would focus on the potential market penetration and revenue generation post-commercialization. Significant growth is anticipated if pipeline candidates are successfully launched.
Recent Initiatives: Recent initiatives likely include progressing clinical trials for its lead candidates, exploring new drug targets, and potentially seeking partnerships or collaborations to advance its pipeline.
Summary
Spero Therapeutics Inc. is a development-stage biotechnology company focused on combating antibiotic resistance. Its strengths lie in its novel pipeline and scientific platform, while its weaknesses include high R&D costs and regulatory hurdles. The growing threat of antimicrobial resistance presents significant opportunities, but intense competition and market economics pose threats. The company's future success hinges on the successful clinical development and commercialization of its lead drug candidates.
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Sources and Disclaimers
Data Sources:
- Company Investor Relations Filings (e.g., 10-K, 10-Q)
- Financial News Outlets
- Biotechnology Industry Reports
- Market Research Data
Disclaimers:
This JSON output is for informational purposes only and does not constitute financial advice. All data presented is based on publicly available information and may not be real-time. Investors should conduct their own due diligence before making any investment decisions. Market share data is illustrative and not derived from a specific current report.
AI Summarization is directionally correct and might not be accurate.
Summarized information shown could be a few years old and not current.
Fundamental Rating based on AI could be based on old data.
AI-generated summaries may have inaccuracies (hallucinations). Please verify the information before taking action.
About Spero Therapeutics Inc
Exchange NASDAQ | Headquaters Cambridge, MA, United States | ||
IPO Launch date 2017-11-02 | CEO, CFO, President, Treasurer & Director Ms. Esther P. Rajavelu | ||
Sector Healthcare | Industry Biotechnology | Full time employees 32 | Website https://sperotherapeutics.com |
Full time employees 32 | Website https://sperotherapeutics.com | ||
Spero Therapeutics, Inc., a clinical-stage biopharmaceutical company, focuses on identifying and developing novel treatments for multi-drug resistant (MDR) bacterial infections and rare diseases in the United States. The company's product candidates include Tebipenem HBr (tebipenem pivoxil hydrobromide), an oral carbapenem-class antibiotic to treat complicated urinary tract infections, including pyelonephritis for adult patients, which is in Phase 3 development; and SPR720, a novel product candidate for first-line treatment of nontuberculous mycobacterial (NTM) pulmonary disease. It has license agreement with Meiji Seika Pharma Co., Ltd. to support the development of tebipenem HBr; Everest Medicines to develop, manufacture, and commercialize SPR206 in Greater China, South Korea, and Southeast Asian countries; and Vertex Pharmaceuticals Incorporated for patents relating to the oral prodrug SPR720, as well as SPR719, an active metabolite. Spero Therapeutics, Inc. was founded in 2013 and is headquartered in Cambridge, Massachusetts.

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