Haystack Oncology (“Haystack”), an oncology company that applies the next generation of circulating tumor DNA (ctDNA) detection technology to optimize minimal residual disease (MRD) testing and better inform decisions around therapy, today announced that it raised $56 million in Series A financing. The funding will be used for the continued development and planned 2023 commercialization of its best-in-class personalized cancer diagnostic test that can detect as few as one mutant molecule in a million DNA molecules, positioning it as the most sensitive ctDNA-based MRD test for use in solid tumors. The financing was led by Catalio Capital Management (“Catalio”), which co-founded Haystack through its private equity and structured equity investment vehicles. Additional investors include Bruker, Exact Ventures, the venture arm of Exact Sciences and Alexandria Venture Investments.