Omnibus Account
Brokers & RegulationA pooled upstream account in which many of a broker's clients sit together, with individual ownership tracked only on internal books.
An omnibus account is a single account a broker holds with a liquidity provider, prime broker or clearer in which the positions of many of its clients are pooled together, instead of each client holding an individually named account upstream. The counterparty sees only the broker's aggregate exposure, while the broker keeps internal books recording what belongs to each client.
Omnibus structures are common because they simplify clearing and reduce cost, but they make record-keeping and client-money segregation critical. If a broker's internal ledgers are inaccurate or client funds are not properly separated from company money, identifying and returning individual clients' balances becomes far harder in an insolvency — which is why regulators focus on reconciliation and audit of these accounts.