GNB Bancorporation is the holding company for Grundy National Bank, GNB Insurance, GNB Investments and Grundy Real Estate. The company s banking operation was established in 1934 and has three branch locations in Grundy Center, Iowa. GNB Investments offers stocks, mutual funds, bonds, individual retirement accounts, annuities and 529 college savings plans. GNB Insurance offers a variety of insurance products, including life, health, long term care, property and casualty, and agriculture and crop insurance. Grundy Real Estate aids buyers and sellers throughout Grundy County with a variety of residential, agricultural and commercial listings.