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
Calm and quiet overnight with clear skies at times. Temperatures will fall, but we should escape the frost!
A grieving mother broke down in tears as she recalled how doctors could not find out what was wrong with her son in the run-up to his death.
Carol Morse claimed her 12-year-old son Ryan dropped to just four stone but doctors failed to act, Cardiff Crown Court hears.