Post Holdings, Inc. operates as a consumer packaged goods holding company in the United States and internationally. It operates through Post Consumer Brands, Weetabix, Foodservice, Refrigerated Retail, and BellRing Brands segments. The Post Consumer Brands segment manufactures, markets, and sells branded and private label ready-to-eat (RTE) cereal and hot cereal products. The Weetabix segment primarily markets and distributes branded and private label RTE cereal products. The Foodservice segment produces and distributes egg and potato products in the foodservice and food ingredient channels. The Refrigerated Retail segment produce and distributes side dishes, eggs and egg products, cheese, sausages, and other refrigerated products to retail customers. The BellRing Brands segment provides ready-to-drink (RTD) protein shakes, other RTD beverages, powders, nutrition bars, and supplements. Post Holdings, Inc. sells its products to grocery stores, mass merchandise customers, supercenters, club stores, natural/specialty stores, and drug store customers; military, e-commerce, and foodservice channels; discounters, wholesalers, and convenience stores; restaurant chains, and food manufacturers and processors; online and specialty retailers, supplement stores, and distributors; and food ingredient customers. The company was founded in 1895 and is headquartered in St. Louis, Missouri.