Circle issued about $9.25 billion in USDC on Solana in May, making it the network’s largest monthly USDC mint volume recorded so far in 2026 based on the provided data. USDC is a U.S. dollar-pegged stablecoin, and minting refers to the creation of new tokens on a blockchain network such as Solana. The figure points to strong stablecoin activity on Solana during the month.