StoneCastle is the Program's Client Services Agent

StoneCastle1 serves as agent for FDIQ Program clients and has no beneficial ownership, rights, title or interest in a client's custodial account, or the funds held by it.
Facilitates new client onboarding into the program
Provides customer support to FDIQ clients
Coordinates the banks that participate in the program
About StoneCastle:

Established in 2010, StoneCastle specializes in supporting FDIC-insured programs, overseeing $20 billion in deposits on behalf of more than 5,000 institutional, government, and high-net-worth clients.
1) StoneCastle Cash Management, LLC (together with its subsidiaries, "StoneCastle")