Castor is on a mission to make every clinical trial faster and patient-focused. : Castor is on a mission to make every clinical trial faster and patient-focused. The clinical trial software company announced Wednesday it raised $45 million in Series B funding to continue modernizing the process as the industry shifts to decentralized clinical trials. Eight Roads Ventures and F-Prime Capital co-led the round and were joined by existing investors Two Sigma Ventures and Inkef Capital. The Series B brings Castor’s total funding to $65 million since it was founded in 2012.