World Wide Sires: Bringing Value To Your Investment In Elite Genetics


Who We Are

World Wide Sires (WWS) was founded in 1971 by Bill Clark, California dairyman and breeder of Cal-Clark Board Chairman (sire of Blackstar). Mr. Clark’s passion for cows and international people grew into a global business that has become a household name for farmers around the world. In 2001, WWS was purchased by American A.I. cooperatives, Select Sires and Accelerated Genetics. The two organizations joined forces after 16 years of working with WWS to deliver industry-leading genetics to over 80 countries worldwide. Select Sires and Accelerated Genetics became a unified cooperative, with 30,000 farmer owners, in 2017. WWS continues to serve as the international marketing arm for their superior genetics. WWS UK was set up as a wholly owned subsidiary in 2016. The same passion for cows and people that created WWS is what drives the business today.

What We Do

WWS offers customers an unparalleled stud of bulls, excelling in Production, Management traits, Fertility and Type. We place emphasis on quality and quantity, as we offer a large selection of bulls that are consistently rising to the top. At World Wide Sires UK, we pride ourselves on delivering an exceptional service – our customers and their success are our highest priority. We offer our UK customers a differentiated product and service, including premium sexed product, a diverse selection of highly reliable Proven sires, the hottest new Genomic releases and genetics that perform time and time again within UK dairy systems.

As well as world-leading genetics, we offer other profitable tools. The World Wide Mating Service (WMS) is designed to build a better herd through customised genetics plans. CowManager is unrivalled in its technology and service; monitoring health, fertility and nutrition within your herd.

Why WWS?

Simply put, WWS delivers. We provide profitable genetics, superior customer service, and a dedicated team to ensure your herd’s success.