Haystack Oncology represents the culmination of over 20 years of collaboration to advance technical and clinical development in liquid biopsy technologies by cancer genomics pioneers at Johns Hopkins School of Medicine. The company, a wholly owned subsidiary of Quest Diagnostics, developed Haystack MRD™, a next generation tumor-informed approach for the measurement of minimal residual disease. Haystack MRD uses an error-corrected ctDNA technology to detect down to one ctDNA molecule in a million normal DNA molecules. Haystack Oncology works with biopharmaceutical companies to accelerate and better inform clinical development programs and advance important therapeutics to global markets, from early phase clinical development to companion diagnostics.