Warren Tea, which has 13 tea gardens in Upper Assam, is an associate of James Warren. In 1993, the Manchester-based G S Ruia group bought James Warren from McLeod Russel, gaining control of Warren Tea.

The company suffered a minor setback in its working in 1987-88. Its yield per hectare is 2255 kg. Warren Tea, along with its associate companies, has purchased a 24% equity stake in Vegepro Foods & Feeds, which was held by Glaxo.

The company diversified into the manufacture of sugar and other downstream products as a part of its growth plans. A MoU was signed with the Karnataka Industrial Investment and Development Corporation to created and deployed a 2-mtpa cement plant. Besides the plantation and agro-based segments, the engineering sector has also been identified by the company for diversification. In 1997-98, Warren Metal Industries was amalgamated with the company.

It is planning to acquire tea gardens in Assam to step up its output level. The company is keen on adding 2-3 million kg to its production.