Woolworths has reportedly put gourmet grocery outlet, Thomas Dux, up for sale as the supermarket giant moves to offload non-core assets.

The Australian Financial Review reports that Woolworths put Thomas Dux on the market earlier in 2015, with an asking price of between $10 million and $20 million.

Woolworths would not say whether the chain was still for sale, the AFR reports.

Woolworths opened its first Thomas Dux store in Sydney in 2008, but the high end chain is said to have suffered from higher operating costs.

AAP