Pearce has been in the position less than a year. She will leave to become CFO of the Tillamook County Creamery Association.
Williams serves as CFO of Penguin Random House.
Davis is also president and CEO. He is taking on finance duties after CFO Fausto Taddei resigned.
Nallen is News Corp.'s deputy CFO. News Corp. CFO David DeVoe will retire when the company is divided to split off 21st Century Fox.
Silcock was CFO at Great Atlantic & Pacific Tea.
Hundt, who serves as controller, will step in when CFO Robert Millard leaves at month's end.