Doncasters manufactures highly engineered precision components for aerospace engines and industrial gas turbines. The company produces structural castings, such as turbine center frames and bearing housings, alongside turbine airfoils including blades and vanes. Doncasters is vertically integrated, manufacturing its own nickel- and cobalt-based superalloys to supply its casting operations and external customers. The business operates through three segments: Engine Products Europe, Engine Products North America, and Turbo Wheels, which serves the automotive and transportation sectors. Doncasters sells directly to major aerospace and industrial OEMs, including GE Aerospace, Pratt & Whitney, and Siemens Energy. The business model relies on long-term agreements that typically span five or more years, providing revenue visibility and margin protection through pass-through clauses for inflation and raw material costs. The company also maintains spot purchase orders to capture premium pricing in capacity-constrained markets. A significant portion of revenue comes from the recurring aftermarket, primarily for industrial gas turbine components that require regular replacement. Doncasters utilizes a customer partnership model where OEMs co-invest in capacity expansion in exchange for dedicated supply. Growth initiatives focus on expanding aerospace airfoil capacity and pursuing acquisitions to enhance technical capabilities.