Sumitomo Mitsui Trust Bank (U.S.A) Limited | 1,492 followers on LinkedIn. Our mission is to provide world-class global custody services and securities lending services. | Sumitomo Mitsui Trust Bank (U.S.A.) Limited, ("SMTBUSA"​), was originally established in 1987 as a New York State chartered trust and banking company, insured by the Federal Deposit Insurance Corporation. SMTBUSA is a wholly-owned subsidiary of The Sumitomo Mitsui Trust Bank, Limited of Japan, which is one of Japan's major trust banks.