ADM Investor Services International Limited | 6,323 followers on LinkedIn. Trading, around the globe, around the clock. Follow us on Twitter: @ADMISI_Ltd | ADM Investor Services International Limited (ADMISI) is a full service brokerage company. We compete for institutional, corporate and retail brokerage business in the international investment and commodity markets by offering the professional services and transaction capabilities required. We specialise in the exchange traded and centrally cleared products and market sectors.