What is the largest veterinary company?

Zoetis is the largest global animal health company when measured by annual revenue.

The company reported approximately $9.5 billion in revenue for full-year 2025, maintaining its position as the leading dedicated animal-health company. Zoetis develops and supplies products for both companion animals and livestock.

Its major categories include:
• parasiticides
• vaccines
• dermatology products
• anti-infectives
• pain and sedation products
• other veterinary pharmaceuticals
• animal-health diagnostics
The company supports major species including dogs, cats, horses, cattle, swine, poultry, fish, and sheep and operates a global network of manufacturing and R&D facilities.

Other major global animal-health companies include MSD Animal Health, Boehringer Ingelheim Animal Health, Elanco, IDEXX Laboratories, Ceva Santé Animale, AdvaCare Pharma and Virbac.

Company rankings can differ depending on whether they include veterinary diagnostics, nutritional products, pharmaceuticals only, or the broader animal-health market. However, Zoetis remains the clearest answer when the criterion is total animal-health revenue.