Marex Begins Accepting USDC as Margin Collateral With Coinbase

According to Marex, the company has begun accepting Circle's USDC stablecoin as initial margin collateral for regulated derivatives positions, with Coinbase providing custody, conversion, and reporting. Prime Trading, a proprietary trading firm, completed the first transaction, transferring USDC to support cleared derivatives positions.

The launch follows a December 8, 2025 CFTC no-action letter permitting registered futures commission merchants to accept stablecoins, Bitcoin, and Ether as customer margin collateral, subject to custody, segregation, and valuation controls. Marex cleared $16 billion in average client balances during Q1 2026, up 33% year-over-year, and cleared 1.37 billion contracts over the prior 12 months.