Natural Hog Gut Casings (Weasands, Runners, Rounds)

Self-described 'leading global player in the harvesting, processing and distribution of natural casings, meat products and pharmaceutical products.' Part of SARIA's Food & Pharma division since 2017; SARIA is also parent of Devro (collagen casings) — making SARIA the parent of the world's largest natural casing company AND the world's largest collagen casing company simultaneously. Van Hessen operates gutrooms inside slaughterhouses globally, positioned 'close to the source.' Also extracts pharmaceutical raw materials (heparin, collagen) from the same intestines processed for casings. Recent acquisitions: full ownership of Westpol-Teeuwissen (Netherlands/Poland).

One of China's major commercial-scale natural casing processors; located in Rugao, Jiangsu province. Rugao is historically one of China's leading natural casing processing centers — a concentration of casing businesses that has grown up around the hog slaughter industry in Jiangsu. Representative of the Chinese processing cluster that handles ~70% of global natural casing volume. Chinese processors import raw casings (pre-cleaned gut) from source countries, process and salt them, and export finished casings globally. COVID lockdowns 2020-2022 disrupted Rugao and similar Chinese casing processing hubs.

NYSE-listed animal by-products rendering and recycling company; revenue $6.13B TTM (2025). Natural casings division operates under the CTH (Combinatie Teijsen Van Den Hengel) brand — a historic Dutch natural casing company acquired by Darling. CTH is one of the world's largest natural casing traders/processors. Darling also owns Diamond Green Diesel (50/50 JV with Valero — world's largest renewable diesel plant in Norco, Louisiana). Darling processes animal fat, protein, blood, feathers, and casings from slaughterhouses globally into fuel, feed, and food ingredients.

German specialty natural casing company; one of the historically significant European natural casing traders and processors. Kempten (Allgäu) is a centuries-old center of the Swabian sausage-making tradition. Processes and distributes hog, sheep, and beef casings to European artisan sausage makers and large processors. Representative of the specialized mid-tier European natural casing industry.