Quanta Therapeutics, a privately-held biopharmaceutical company pioneering targeted therapies to treat RAS-driven cancers, today announced a $50.7 million Series D financing. The financing was led by Avidity Partners and was supported by Quanta's existing investors including Sofinnova Investments, Vida Ventures, Surveyor Capital (a Citadel company), Longitude Capital, BVF Partners and AbbVie Ventures. Other new participants were GC&H Investments (the partner fund of Cooley LLP) and WS Investment Company (Wilson Sonsini's venture arm). The Series D funding brings the total amount raised since inception to over $142 million.