The Halo Foods factory at Tywyn in Gwynedd will close today, with the loss of 105 jobs.
The company is moving production to its plant at Newport in South Wales.
It says all employees have been offered the chance to relocate, including financial support. A support hub in Tywyn will stay open until the New Year.
More top news
Carwyn Jones and Leanne Wood join forces to put forward an alternative plan for the UK's departure from the European Union
Winter sunshine with cloud creeping in during the afternoon and a frosty night ahead.
The Revd Canon Joanna Penberthy has been consecrated as Bishop of St Davids in "an historic" day for the Church in Wales.