The chief executive officer of Ben & Jerry's ice cream is leaving his post at the end of next month. The South Burlington-based unit of Europe's Unilever said Walt Freese wants to pursue other "values-led business and investment opportunities."

Freese joined Ben & Jerry's and parent Unilever eight years ago. The company says Freese has been instrumental in returning Ben & Jerry's to its heritage of leadership in progressive social and environmental values. Ben & Jerry's is known for its quirky flavors and support for social causes.