Rolls-Royce Holdings PLC designs, manufactures, and services power systems and propulsion solutions, primarily focusing on aerospace and marine applications. Its operations are divided into three main segments: Civil Aerospace, which produces engines for commercial and business aircraft; Defence, which supplies engines for military aircraft and naval propulsion systems; and Power Systems, which offers energy solutions for power generation, governmental, maritime, and industrial sectors. The company serves a global customer base across various markets, including commercial aviation, military defense, and energy generation.