(BRK.A), (BRK.B)
Berkshire Hathaway has completed its latest acquisition, adding Bell Laboratories of Windsor, Wisconsin, to its portfolio. The deal closed on July 31, bringing into the fold a company that fits Warren Buffett’s preference for businesses with stable, long-term revenue streams.
Founded in 1974 by Malcolm Stack, Bell Laboratories began with a single product, Rodent Cake, and has since grown into a global leader in rodent control. The company manufactures a wide range of products—including rodenticides, tamper-resistant bait stations, glue boards, traps, and attractants—sold across six continents to pest control and agricultural industries.
Bell has distinguished itself through continuous research and development, registering more rodenticide products with the U.S. Environmental Protection Agency than any other American manufacturer. It is also unique in synthesizing its own anticoagulant and acute technical materials, ensuring full control over product quality.
With more than 600,000 square feet of facilities at its Windsor headquarters and a growing international presence, Bell Laboratories has firmly established itself as a global powerhouse in pest management—now under the Berkshire Hathaway umbrella.
© 2025 David Mazor
Disclosure: David Mazor is a freelance writer focusing on Berkshire Hathaway. The author is long in Berkshire Hathaway, and this article is not a recommendation on whether to buy or sell the stock. The information contained in this article should not be construed as personalized or individualized investment advice. Past performance is no guarantee of future results.