• A.L.H. Genetics B.V. (Netherlands)
• Koole-Liebregts - Holland Genetics Firm
• Eurogenes- Europe
• Van der Ploeg International bv
• Bles Dairies Genetics
• Holland Genetics
• German Genetics International - Germany
• GAP International - Italy
• Osnabruker Herdbuch eG - Germany
• Sima - Simagena 
• Swiss Genetics - Switzerland
• Eurogenes - Netherlands
• Australian Genetics
• Sersia - France
• Vost - Germany
• Weavercroft - Canada
• Osnabrucher Herdbook 
• Quality Genes - Netherlands
• Holstein UK - England
• Cogent 
• VOST - Germany
• Aberekin - Spain

Equipment

• Show Equipment - Netherlands
• Agriprom - Netherlands

Associations

• Holland Genetics
• Canadian Dairy Network Canadian genetics 
• Italian Holstein Association Italian genetics 
• German Holstein Databank   German genetics 
• Austria Genetics 
• Montebeliarde 
• Aussie Reds
• Norwegian Dairy Cattle
• Ayrshire - Canada
• German Fleckvieh