EcoR1 Capital CRSP Position
Active4-Fund ConvergenceEcoR1 Capital held their position in CRISPR Therapeutics AG (CRSP) in Q4 2025, holding $72.9M worth of shares across 1,389,276 shares.
The position was first reported in Q1 2024 and has been tracked across 8 quarterly 13F filings.
CRSP is a convergence signal: 4 specialist biotech funds hold this stock, suggesting high institutional conviction.
There is an upcoming Phase 3 readout for CTX001 in 45 days (May 31, 2026), making the timing of EcoR1's position particularly relevant.
Short interest stands at 25.3% of float with 9.4 days to cover, indicating significant bearish positioning against EcoR1's long thesis.
About CRISPR Therapeutics AG
CRISPR Therapeutics AG, a gene editing company, focuses on developing gene-based medicines for serious diseases using its proprietary Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR)/CRISPR-associated protein 9 (Cas9) platform. Its CRISPR/Cas9 is a gene editing technology that allows for precise directed changes to genomic DNA. The company has a portfolio of therapeutic programs across a range of disease areas, including hemoglobinopathies, oncology, regenerative medicine, and rare diseases. The company's lead product candidate is CTX001, an ex vivo CRISPR gene-edited therapy for treating patients suffering from transfusion-dependent beta-thalassemia or severe sickle cell disease in which a patient's hematopoietic stem cells are engineered to produce high levels of fetal hemoglobin in red blood cells. It also develops CTX110, a donor-derived gene-edited allogeneic CAR-T investigational therapy targeting cluster of differentiation 19 positive malignancies; CTX120, a donor-derived gene-edited allogeneic CAR-T investigational therapy targeting B-cell maturation antigen for the treatment of relapsed or refractory multiple myeloma; and CTX130, a donor-derived gene-edited allogeneic CAR-T investigational therapy targeting Cluster of Differentiation 70 to treat various solid tumors and hematologic malignancies. In addition, the company develops VCTX210, a gene-edited immune-evasive stem cell-derived product candidate for the treatment of treatment of type 1 diabetes; and pursues various in vivo gene-editing programs that target the liver, lung, muscle, and central nervous system diseases. It has strategic partnerships with Bayer Healthcare LLC, Vertex Pharmaceuticals Incorporated, ViaCyte, Inc., Nkarta, Inc., and Capsida Biotherapeutics. CRISPR Therapeutics AG was incorporated in 2013 and is headquartered in Zug, Switzerland.
Full company profile →Short Interest
25.3%
9.4 days to cover
EcoR1 Capital CRSP Position History
Frequently Asked Questions
Does EcoR1 Capital own CRSP?
Yes. As of Q4 2025, EcoR1 Capital holds 1,389,276 shares of CRISPR Therapeutics AG (CRSP) valued at $72.9M. This data comes from their SEC 13F filing.
How many hedge funds own CRSP?
4 specialist biotech hedge funds currently hold CRSP, including Baker Bros. Advisors, Avoro Capital Advisors, Tang Capital Management. When 3 or more specialist funds hold the same stock, BiotechEdge flags it as a convergence signal.
When did EcoR1 Capital first buy CRSP?
EcoR1 Capital's position in CRSP was first reported in Q1 2024. 13F filings are reported with a 45-day delay, so the actual purchase may have occurred earlier in the quarter.
Is EcoR1 Capital's CRSP position increasing or decreasing?
EcoR1 Capital held their CRSP position unchanged in the most recent quarter.
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