£400m for Kettle chips
San Francisco-based Diamond Foods is paying $615 million (400 million) "in cash" for Kettle Foods.
The manufacturer of premium crisps is currently owned by London-based private equity firm Lion Capital and has a factory in Bowthorpe, near Norwich. The company was founded in 1978.
The deal is expected to go through this year.
Michael Mendes, chairman of Diamond Foods, said his firm had a "deep respect" for Kettle's "truly premium brand".
He added: "We plan to invest behind the brand to position it for long-term success."