The Kahuhia Farmers Cooperative Society has four factories (wet mills), and was first registered under the Coop Act on 25th April 1959. Wanjegi’s sister factories in the society are Kahuhia, Ngwethe and Gathinja.
The coop has 16 permanent staff. Wanjengi factory has 1549 active members (1184 male, 362 female. It is located on the highly productive South-Western slopes of Mt Kenya and on the eastern slopes of the Abadares ranges. Main crop is harvested in October through December and Fly crop in April through June each year.