Cattle Price Discovery and Transparency Act of 2021 This bill requires the Department of Agriculture (USDA) to take various actions to address transparency in pricing and contract terms in the cattle industry. Among these requirements, USDA must (1) establish regional minimum percentages of cattle that meat packers must procure through negotiated purchases or negotiated grid purchases (i.e., transactions where the price is known and negotiated at the time of the transaction), and (2) maintain a publicly available catalog of contracts offered by meat packers to livestock producers for the purchase of fed cattle.