Seko S.A. engages in the production and trade of marinades and fish products in Poland, Czech Republic, Slovakia, Germany, Lithuania, the United States, France, Italy, Hungary, Romania, Austria, Spain, and internationally. The company offers fishes, pastes, salads, canned fishes, mini fishes, ready meals, and frozen products. It also produces fish marinades, including fried fish fillets, corks and rolls, rollmops, bismarck fillets, pickled herrings, slices in oil and vinegar marinades, and cream products; salted fish; fish in sauces, and fish in aspic; as well as sterilized and pasteurized products, such as canned food in alupak packaging, and traditional metal packaging. The company was founded in 1992 and is based in Chojnice, Poland. Seko S.A. is a subsidiary of Zlota Rybka Sp. Z.o.o.