MrBeast's studio head is leaving after less than a year. Here's what his company's CEO told staffers.

Jimmy Donaldson, a.k.a. MrBeast, faces a transition as his head of studios departs. Michael Buckner/Variety via Getty Images Corie Henson, MrBeast's studio head, is leaving after just under a year in the position. The Hollywood exec told the company she's returning to LA to get back to her family. The company's CEO said he would use the transition as a chance to improve execution and culture. Corie Henson, MrBeast's studio head, is leaving after just under a year. The former NBCUniversal…