World Wide Sires, Ltd. Email Format

Dairy Product ManufacturingCalifornia, United States51-200 Employees

World Wide Sires, Ltd. is a mid-sized dairy genetics company based in Visalia, California. Founded in 1971 by Bill Clark, it operates as a wholly owned subsidiary of Select Sires Inc., the largest AI cooperative with farmer owners across six continents. The firm distributes high-quality bovine genetics through its three brands—Select Sires, Accelerated Genetics, and GenerVations—to markets in Europe, Africa, Asia, Oceania, the Middle East, and the Americas. Its customers are dairies and breeding operations that participate in AI programs and herd improvement efforts across these regions. In June 2022, Rebekah Mast was named associate vice president of genetic dairy solutions and talent development for World Wide Sires and Select Sires Inc., a notable leadership appointment for the group.

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