Company description

We are a precision oncology company pioneering the discovery and development of small molecule, tumor-agnostic therapies targeting p53. p53 is a well-defined tumor suppressor protein known as the “guardian of the genome,” and normal, or wild-type, p53 has the ability to eliminate cancer cells. However, mutant p53 proteins can be misfolded and lose their wild-type tumor suppressing function. These p53 mutations are found in approximately half of all cancers. The field of p53 biology was established by our co-founder Dr. Arnold Levine when he discovered the p53 protein in 1979. We have leveraged more than four decades of research experience and developed unique insights into p53 to create a precision oncology platform designed to generate selective, small molecule, tumor-agnostic therapies that structurally correct specific mutant p53 proteins to restore their wild-type function. We are deploying our precision oncology platform to target p53 mutations and other p53-related cancers. Our lead product candidate, rezatapopt, is an orally available small molecule designed to potently and selectively correct p53 misfolding caused by a specific p53 mutation, Y220C, while sparing wild-type p53. The p53 Y220C mutation is associated with approximately 1% of all cancers, including endometrial, breast, non-small cell lung cancer, or NSCLC, colorectal, pancreatic and notably, approximately 3% of ovarian cancers. Rezatapopt is designed to restore the wild-type conformation by occupying the pocket created by the tyrosine to cysteine mutation in amino acid position 220.

Read the full filing description · filed 6 Mar 2026

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Healthcare

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