Arnold & Porter LLP was an international law firm with practice areas included corporate, antitrust, competition, compensation and benefits, and environmental law. The Firm's clients included companies from the aerospace, business services, chemicals, communications, consumer products, electronics, energy services, engineering, financial services, healthcare services, IT, leisure, life science, machinery, media, medical products, real estate, and transportation sectors. Arnold & Porter was established in 1946 and was based in Washington DC. In November 2016, Arnold & Porter LLP was merged with New York-based firm Kaye Scholer LLP to form Arnold & Porter Kaye Scholer LLP.