Circle Pharma vs Lyell Immunopharma
Side-by-side comparison of AI visibility scores, market position, and capabilities
Circle Pharma develops orally deliverable macrocycle drug candidates targeting intracellular protein-protein interactions in cancer; raised $90M Series B in 2023 led by Novo Holdings and Foresite Capital; headquartered in San Francisco;
About
Circle Pharma is a clinical-stage biopharmaceutical company founded in 2016 by Matthew Jacobson, Siegfried Bhagwati, and Grace Aldrovandi, headquartered in San Francisco, California. The company is developing a new class of therapeutics — cell-permeable macrocycles — designed to inhibit intracellular protein-protein interactions (PPIs) that have historically been considered "undruggable." Protein-protein interactions control critical cellular processes including cell division, apoptosis (programmed cell death), and gene expression. Dysregulation of these interactions drives many cancers, but their large, flat interaction surfaces are difficult to block with small molecules, and biologics (antibodies) cannot cross cell membranes to reach intracellular targets. Circle Pharma's macrocycles are medium-sized ring-shaped molecules engineered to be both cell-permeable and orally bioavailable — a combination rarely achieved — enabling them to reach and inhibit these targets.
Lyell Immunopharma develops next-generation CAR-T cell therapies designed to overcome T cell exhaustion and treat solid tumors, the frontier of cell therapy.
About
Lyell Immunopharma is a clinical-stage cell therapy company founded in 2018 by Rick Klausner and publicly traded on Nasdaq. The company focuses on next-generation CAR-T therapies that address the key limitations of first-generation products, particularly the exhaustion and dysfunction of engineered T cells that limits efficacy especially against solid tumors. Lyell has developed proprietary T cell reprogramming technologies including gene overexpression approaches that maintain T cell stemness and fitness during manufacturing and after infusion. The company is applying these technologies to both hematological malignancies and solid tumors in a pipeline of clinical programs. Lyell has established a research collaboration with GlaxoSmithKline to combine cell therapy expertise. While first-generation CAR-T products have demonstrated remarkable responses in blood cancers, Lyell is focused on the much larger unmet need in solid tumors where current CAR-T therapies have shown limited efficacy. The company represents the scientific evolution of the cell therapy field toward more durable and broadly applicable treatments.
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