Amfac, Inc., formerly known as American Factors and originally H. Hackfeld and Company, was a land development company in Hawaii. Founded in 1849 as a retail and sugar business, it was considered one of the so-called Big Five companies in the Territory of Hawaii. At its peak it owned 60,000 acres (24,000 ha) of land, and was a dominant sugar company in Hawaii as well the founder of one of its best known department stores, Liberty House. It now owns 5,000 acres (2,000 ha) of land in Kaanapali on the island of Maui. Since 2005 it is known as Kaanapali Land, LLC (OTC Pink: KANP).
German immigrant Heinrich Hackfeld and his brother-in-law J. C. Pflueger founded a dry goods store called H. Hackfeld and Company in 1849 in Honolulu. Hackfeld later became the business agent for Kōloa Plantation on the island of Kauaʻi. Paul Isenberg (1837–1903) became a partner in 1881.
During World War I, Pioneer Mill, DCCA #207, was seized by the U.S. government Alien Property Custodian. It was later sold to a consortium of Hawaii businessmen in 1918, who changed the name to "American Factors". In 1966, the name was further shortened to "Amfac". Henry Alexander Walker became president in the 1930s. The family estate known as the H. Alexander Walker Residence, was developed into a showcase garden.