Bain & Company estimated that there was around $20 billion in private equity-backed healthcare transactions during 2015, less than the approximately $29.6 billion reached in 2014. Bain's estimate of deal volume includes deals for which the size isn't known as well as those that are known. "$20 billion worth of deals is nothing to sneeze at," said Nirad Jain, a Bain partner. "Larger assets like Ortho Clinical Diagnostics that Carlyle bought in 2014 [for $4.15 billion] are just less available."