Ford Bridgend has been given £140m of taxpayer money, it has been revealed.
Speaking ahead of an announcement which it is expected will see the , economy minister Ken Skates admitted vast sums have been invested in the site.
He said around £140m has been paid to the company from the public purse since 1978.
Mr Skates said that the money had been "well spent" because it had ensured jobs and helped other businesses.
But, until the Welsh Government has been told about their future plans for south Wales, the company cannot take any further money.
He told Radio Wales: "We’ll be recalling any money that still has employment conditions attached. I’ve put a stop on any further money being drawn down by Ford until we’ve know the outcome of announcement today.
"In total, the taxpayer has invested a huge sum in the Ford Bridgend plant and workers do not deserve to be treated this way.
"Since 1978 something in the order of £140m of taxpayer money has been invested in that plant.
"That’s been money well spent because just in the last decade alone £3bn has been pumped back into the Bridgend economy as we heard from the cafe owner, many businesses are hugely dependant on that site."
How much has the Welsh Government invested?
In September 2008, former First Minister Rhodri Morgan announced a £70m grant to Ford Bridgend to fund the development of a new engine. At the time it employed 2,000 staff. But shortly afterwards it emerged staff were to be temporarily laid off because of the global credit crunch.
n September 2016, Bethan Sayed AM told plenary “Since devolution the Welsh Government has invested over £43million of public money in Ford Bridgend”.
The following year, in October 2017, Mr Skates announced the Welsh Government had given Ford Bridgend £14.6m to “safeguard a predicted 772 jobs on the site".
At the time, Mr Skates said: "The facility will initially be producing 125k engines, safeguarding an estimated 550 jobs but has capacity to add further lines to increase production and jobs created in the future.”
In September 2018, then-First Minister Carwyn Jones announced Ford had been given £1.6m from a fund to get business ready for Brexit.
He said that was to “ensure their workforce are up-skilled and prepared post-Brexit”. Airbus also received money, £3m.
Mr Jones said: "Airbus and Ford are part of global groups and our support will help significantly improve the chances of developing the Welsh-based sites as the preferred locations for any future and post-Brexit European investment projects and also in turn securing business for the aerospace and automotive supply chains in Wales.
