River Markets Registers Affiliate as CFTC Futures Commission Merchant

Prediction market broker River Markets has registered its affiliate, River Finance LLC, with the Commodity Futures Trading Commission as a futures commission merchant and joined the National Futures Association, according to a company release. The registration lets the affiliate carry customer accounts and handle client funds — a step that moves the firm beyond execution technology into regulated brokerage.

The milestone lands barely six months after the company's founding. River Markets launched in May, has routed more than 250 million contracts, and closed an $8.5 million seed funding round backed by what it calls "top-tier venture capital firms." Its client base spans hedge funds, sports funds, proprietary trading firms, and event-risk hedging companies.

What does the FCM registration actually change?

Plenty. An FCM registration is the gateway to holding customer money in regulated derivatives markets. Without it, a broker can route orders but cannot carry accounts or custody client funds. With it, River Finance can build what the parent company describes as a prime brokerage platform for prediction markets.

The plan, laid out in the release, is a single account that lets institutional traders manage capital, positions, and risk across multiple exchanges and clearinghouses. The firm also plans to support financing arrangements and permitted over-the-counter trading.

"Our conversations with the institutions entering this market give us a unique view of what they need," cofounder and CEO Oscar Levy said in the release. "Access to event contracts isn't enough. They need to use capital efficiently and manage risk around the clock, across exchanges. That's the brokerage model we're building."

Why prime brokerage is arriving now

The timing is not accidental. Combined trading volume across Kalshi, Polymarket US, and Polymarket's international platform exceeded $500 billion in October. Prediction markets have grown large enough to generate demand for the brokerage, clearing, financing, and risk-management services that derivatives markets have offered for decades.

Institutional money wants leverage, consolidated reporting, and capital efficiency. Retail-oriented exchange apps do not provide those. Levy's pitch is that the bottleneck for institutions is no longer access — it is operational infrastructure.

River Markets is joining a quickly crowding field of firms seeking the same regulatory footing:

• In July, Polymarket-affiliated entities sought FCM and swap-firm registration through the NFA to let U.S. customers trade on borrowed capital.
• Kalshi affiliate Kinetic Markets received NFA approval as an FCM and swap firm in March.
• Last month, Blockchain.com applied for a designated contract market license and FCM registration.
• Hyperliquid Strategies filed last week to become an FCM, aiming to carry U.S. client accounts for HIP-3 perpetual futures markets inside a regulated framework.

That is four registration pushes in under a year, all aimed at the same prize: the institutional plumbing layer for a market that barely registered on compliance desks two years ago.

The operational stakes

For River Markets, the registration converts a technology vendor into a regulated intermediary. That shift brings NFA oversight, capital requirements, and customer-fund segregation rules. It also opens revenue lines that pure execution firms cannot touch — financing, custody-adjacent services, and cross-exchange margining.

For the prediction market sector, it signals a maturing structure. Exchanges like Kalshi and Polymarket built the venues. The next layer — clearing, credit, and prime services — is now being assembled by FCM registrants racing to serve funds that treat event contracts as an asset class rather than a novelty.

Competition among newly registered FCMs will likely turn on who can offer cross-exchange margin and round-the-clock risk management first, since Levy is explicit that institutions want capital efficiency across venues, not just access to a single one. River Markets' 250 million routed contracts give it a running start on order flow, but rivals with deeper balance sheets — Blockchain.com among them — are queuing at the same regulatory door.

Expect the next checkpoint to be NFA membership approvals and the first live prime brokerage accounts, as the firms that filed this year move from registration to actual client-fund handling in the months ahead.