U.S. custody giant State Street is expanding into Oman, a vote of confidence in the Gulf’s smallest aspiring financial center. State Street, one of the big three global custodians alongside BNY and Northern Trust, has served Omani clients from a Muscat office for more than two decades. The Gulf Cooperation Council, of which Oman is a member, is a declared strategic priority for State Street. The agreement between State Street and Jadwa is, for now, only a memorandum of understanding, with no concrete mandate and no assets yet committed. When a custodian of State Street’s heft attaches its name to Oman, it redraws the Gulf’s financial map at the edges.