Sam Altman and Lachy Groom led the round, with participation from new and existing investors, including Sequoia Capital (Series A lead), Thrive Capital (Series B lead), Casdin Capital, Dragoneer, Section 32, John Doerr, Spark Capital, Felicis Ventures, Sound Ventures, Arrowmark, and previous investors.

TrialSpark is a technology-driven pharma company that runs end-to-end clinical trials, focused on bringing new treatments to patients faster and more efficiently. TrialSpark has built a technology platform that optimizes all aspects of a clinical trial, enabling more efficient trial design, faster trial completion, and higher trial data quality. TrialSpark in-licenses and co-develops drug programs through in-house development, joint ventures, and NewCos.