River Markets, a prediction market broker, has completed CFTC registration through its affiliate.

River Markets said its affiliate River Finance LLC has registered with the CFTC as a futures commission merchant and joined the NFA, enabling it to hold customer accounts and handle client funds. The firm, founded in May, is building a prime brokerage platform for institutional traders to manage funds, positions and risk across multiple prediction-market exchanges and clearinghouses from a single account, with support for financing arrangements and approved off-exchange trades. River Markets says it has routed more than 250 million contracts for hedge funds and proprietary trading firms, and it previously raised an $8.5 million seed round. The registration matters because it gives the young brokerage the regulatory footing to custody client money as prediction markets draw growing institutional interest. What to watch next is whether the platform launches its unified multi-venue account and converts its contract-routing volume into assets under management.