Alliance said the agreement was a move by the Austrian firm to build on changes made to presentation and quality
of its wines by the new
Wachau management team of Roman Horvath and Heinz Frischengruber.
The 300-year-old co-operative has invested in vineyard quality and has graded growers to try to drive up standards.
Horvath said: "At at time when we have a lot of potential to build upon, we are delighted to have found a company whose energy, passion and dynamism match our own."
Giles Cooke MW, wine development director for Alliance, added: "We have been really impressed by the wine quality
and professionalism that accompanies it.
"The wines are fabulous and express a sense of place like no other wines can. We are going to have real fun selling them."