Circle Flips the Switch on Arc, Its Bet That Institutions Will Run a Public Blockchain
September 21, 2026
Circle took its Arc blockchain live on public mainnet on September 16, 2026. The detail that matters most is not the technology, but the guest list. The founding validators include BlackRock, Mastercard, Visa, the Depository Trust & Clearing Corporation and Intercontinental Exchange. Standard Chartered, SBI Group, MoneyGram, Galaxy, Sumitomo Corporation and Worldpay, now part of