EcoR1 Capital MREO Position
Active7-Fund ConvergenceEcoR1 Capital initiated a new position in Mereo BioPharma Group plc (MREO) in Q4 2025, holding $3.3M worth of shares across 7,856,466 shares.
MREO is a convergence signal: 7 specialist biotech funds hold this stock, suggesting high institutional conviction.
About Mereo BioPharma Group plc
Mereo BioPharma Group plc, a biopharmaceutical company, develops and commercializes therapeutics for the treatment of oncology and rare diseases in the United Kingdom and internationally. Its lead product candidate, etigilimab (OMP-313M32), an antibody T-cell immunoreceptor with Ig and ITIM domains, which is in Phase 1b clinical trial for the treatment of tumor. The company is also developing Navicixizumab (OMP-305B83), which has completed Phase 1b clinical trials for the treatment of the late line ovarian cancer; Acumapimod (BCT-197), a p38 MAP kinase inhibitor that is in Phase II clinical trials to treat acute exacerbations of chronic obstructive pulmonary disease; and Leflutrozole (BGS-649), an oral aromatase inhibitor for the treatment of hypogonadotropic hypogonadism. In addition, it develops rare disease product candidates, including Setrusumab (BPS-804), a novel antibody for the treatment of osteogenesis imperfecta; and Alvelestat (MPH-966), an oral small molecule that is in Phase II clinical trial to treat Alpha-1 antitrypsin deficiency. The company has a collaboration with The University of Texas MD Anderson Cancer Center to evaluate anti-TIGIT therapeutic antibody candidate, etigilimab. Mereo BioPharma Group plc was incorporated in 2015 and is based in London, the United Kingdom.
Full company profile →Short Interest
9.9%
5.6 days to cover
Frequently Asked Questions
Does EcoR1 Capital own MREO?
Yes. As of Q4 2025, EcoR1 Capital holds 7,856,466 shares of Mereo BioPharma Group plc (MREO) valued at $3.3M. This data comes from their SEC 13F filing.
How many hedge funds own MREO?
7 specialist biotech hedge funds currently hold MREO, including Rock Springs Capital, Deerfield Management, OrbiMed Advisors and 3 more. When 3 or more specialist funds hold the same stock, BiotechEdge flags it as a convergence signal.
When did EcoR1 Capital first buy MREO?
EcoR1 Capital's position in MREO was first reported in Q4 2025. 13F filings are reported with a 45-day delay, so the actual purchase may have occurred earlier in the quarter.
Is EcoR1 Capital's MREO position increasing or decreasing?
EcoR1 Capital initiated a new position in MREO in the most recent quarter. This is their first reported holding.
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