2 Sisters Food Group has told ITV News that it bought 11 processing plant sites around the UK six weeks ago.
It says they were all operating below capacity, losing money and had an uncertain future.
It plans to transfer work from other sites to Llangefni, but says that is not confirmed at this stage.
A consultation process with workers will start soon, and the jobs could potentially be created in one or two years' time.
It says its plans are about creating security for the future, which had looked bleak.
Up to 300 new jobs could be created at a chicken processing plant on Anglesey according to the Unite union.
Paddy McNaught says the owners have begun a consultation process over creating an extra shift.
He said the news showed the "commitment of the new owners to the Llangefni plant."
2 Sisters Food Group took over the plant, along with other sites in Merthyr Tydfil and Flintshire from the Dutch firm Vion at the beginning of March.
The creation of the new jobs will almost double the current workforce to around 600.
The Unite union has welcomed the news saying that it was part of the Birmingham based groups plan to expand sites where they already operate.
In November last year the site in Llangefni was put at risk of closure after Vion decided to sell its UK businesses to focus on its core European markets.