Spero Therapeutics Inc.
SPRO | NASDAQ
$1.32
+$0.18 (+15.79%)
Sep 22, 2026, 1:58 PM ET · Market open
Company Profile
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.
Key Executives
| Name | Position |
|---|---|
| Esther Rajavelu | CEO, President, CFO, Chief Business Officer, Treasurer & Director |
| Timothy Keutzer | Chief Operating Officer |
| Debra Jeske Zack | Chief Medical Officer |
| John Raymond | Senior Vice President of Finance & Business Operations |
| Sheila Finan | Senior VP & Controller |
Latest SEC Filings
| Date | Type | Title |
|---|---|---|
| Aug 28, 2026 | 8-K | Current Report |
| Aug 28, 2026 | S-3 | Filing |
| Aug 12, 2026 | 8-K | Current Report |
| Aug 12, 2026 | 10-Q | Quarterly Report |
| Aug 06, 2026 | 4 | Filing |
| Aug 06, 2026 | 3 | Filing |
| Jul 14, 2026 | 8-K | Current Report |
| Jun 25, 2026 | 4 | Filing |
| Jun 25, 2026 | 4 | Filing |
| Jun 25, 2026 | 4 | Filing |
Spero Therapeutics Inc.
| Country | United States |
| IPO Date | Nov 1, 2017 |
| Industry | Biotechnology |
| Sector | Healthcare |
| Employees | 25 |
| CEO | Esther Rajavelu |
Contact Details
675 Massachusetts Avenue Cambridge,
Massachusetts 02139 United States
Stock Details
| Ticker Symbol | SPRO |
| Exchange | NASDAQ |
| Fiscal Year | January - December |
| Reporting Currency | USD |
| CIK Code | 0001701108 |
| CUSIP Number | 84833T103 |
| ISIN Number | US84833T1034 |
| SIC Code | 2834 |
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