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Daily close · 2026-10-21
Price return
Both stocks start at 0% on the first shared trading day.
RDHL-99.99%
SPRO-93.47%
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Split-adjusted closing prices. Dividends are excluded.Year ranges begin January 1 of the end year minus the selected years.
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CONTEXT ATTACHEDRDHL + SPROPrices, financials and SEC filing evidence
Similarity
90.4%
3 shared / 4 total tags
How similar are their businesses?
The score compares business activities in annual filings released in 2025. Core activities receive four times the weight of material activities. Industries that fewer companies share carry more weight.
Positive activities from the two selected annual filings. Expand each group to view all its activities, or use the complete table below. These are classification sets, not revenue shares. The weighted similarity score also accounts for exposure and how common each activity is.Show business activity table · 4 rows, 3 columns
Core activities receive full weight; material activities receive one quarter. Select a tag to read the filing evidence.
Business activity
RDHL
SPRO
Core
Core
Core
Core
Core
Core
Material
Not tagged
What each company does
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RL
Redhill Biopharma Ltd.
RDHL · XNAS
RedHill Biopharma Ltd., a specialty biopharmaceutical company, primarily focuses on gastrointestinal and infectious diseases. The company develops and commercializes Talicia for the treatment of H. pylori infection in adults; and Aemcolo for the treatment of travelers' diarrhea in adults. Its pipeline consists of five therapeutic candidates, which are in clinical development include opaganib for treating patients hospitalized with SARS-CoV-2 severe COVID-19 pneumonia, prostate cancer, nuclear radiation protection; and host directed anti-viral; RHB-107 (upamostat) for treating outpatients infected with SARS-CoV-2 (COVID-19 disease) and advanced unresectable cholangiocarcinoma; RHB-104 for Crohn's disease; RHB-102 (Bekinda) for the treatment of acute gastroenteritis and gastritis, irritable bowel syndrome with diarrhea, and oncology support anti-emetic; and RHB-204 that is in Phase 3 clinical trial for the treatment of pulmonary Mycobacterium avium complex disease in adults. The company was incorporated in 2009 and is headquartered in Tel Aviv, Israel.
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.
Price return uses split-adjusted daily closes and excludes dividends. Both stocks start on the first shared trading day within the selected window. Unavailable metrics leave gaps.
Financials use SEC canonical statements available by the displayed cutoff, retaining each company's fiscal period end. Annual and quarterly amounts are shown separately. P/E is unavailable when earnings do not support a positive ratio.
Business overlap uses industry tags from annual filings released in 2025. Each core activity receives full weight; each material activity receives one quarter of that weight. Rarer industries carry more weight. We sum the smaller exposure for each shared activity and divide it by the sum of the larger exposure for every activity in either company. This measures business overlap, rather than price correlation or expected returns.
Search eligibility requires distinct issuers, a shared core category and at least 20% weighted overlap, supported by industry or sector evidence and specific business activities. Broad classifications require stronger overlap within the same sector. Comparisons also need at least 252 shared price observations within two years, recent trading and a common sourced revenue or net-income trend. Missing P/E or gross margin alone does not exclude a comparison. The eligibility snapshot refreshes daily. Related comparisons use a separate, stricter peer rule; their ten-peer discovery limit does not limit search eligibility. Other stock pairs remain available in the comparison tool.
Statements available through 2026-10-22. Industry snapshot: 2025-12-31 · 5,721 classified issuers.