In 1905, Stanley Wheelock established Stanley Woolen Mills and in 1968, the Wheelock family formed a new handknitting subsidiary. The family name STANLEY was combined with the first syllables from the last names of two sales agents - BER from Berglass and RO from Rosenberg - and CO for company, resulting in BERROCO. With that, the company Stanley Berroco was born. In 1987, Stanley Berroco was reestablished by Warren Wheelock and his wife, Caroline, as Berroco, Inc. This new firm grew to become one of the largest importers and wholesalers of handknitting yarns, patterns and supplies in the United States and Canada. Its range of specialty yarns are imported from countries around the world, including the United Kingdom, Switzerland, Germany, France, Italy, Turkey, Romania, Brazil and Peru. 

In addition to its yarns, Berroco publishes an extensive range of books and patterns for both knitting and crochet.  

Now operating on the site of the old Lonsdale Cotton Mill (1904) in North Smithfield, Rhode Island, Berroco continues the family tradition, providing quality textiles by continually adapting to the changing needs of the times.