TL;DR
- Institutional Launchpad: Circle’s Arc Mainnet debuts with validators including BlackRock, Visa, DTCC and Mastercard, positioning the network as a high‑grade institutional settlement layer.
- Token Genesis: Circle minted 10 billion ARC tokens at Arc Mainnet genesis, stressing the token is not yet public and will evolve alongside a planned shift to proof of stake in 2027.
- Financial Infrastructure: The Mainnet integrates Circle Payments Network, StableFX, tokenized funds, lending markets and major trading venues, aiming to become a core operating system for onchain financial activity.
Circle officially launched Arc Mainnet on Wednesday, marking its most ambitious expansion beyond issuing the $74 billion USDC stablecoin. CEO Jeremy Allaire called the debut “the most consequential major platform launch” in the company’s history, framing Arc Mainnet as a general‑purpose economic operating system for payments, tokenized markets, lending, trading and future commerce between AI agents.
Arc Mainnet is live.
Arc launches as the Economic OS for the internet: an open platform for global markets, real-time value movement, tokenized assets, and agentic economic activity.
Arc is more than a blockchain.
It launches as a full-stack financial platform with assets,… pic.twitter.com/SWg0NlUijO
— Arc (@arc) September 16, 2026
The move comes as competition intensifies across global institutions preparing their own stablecoins and settlement networks. Circle’s strategy with Arc Mainnet is to build infrastructure that appeals to banks, asset managers and payment giants that have hesitated to use existing blockchains. The network offers sub‑second finality, predictable fees paid in USDC and configurable privacy designed for regulated financial environments.
BlackRock, Visa and DTCC Anchor the Network
The launch of Arc Mainnet brings a heavyweight roster of founding validators including BlackRock, DTCC, Intercontinental Exchange, Mastercard, Standard Chartered and Visa. More than 100 institutions and ecosystem builders are already live or exploring the network, with trading venues such as Uniswap and Aerodrome and lending markets from Aave and Morpho available from day one.
Circle emphasized that Arc Mainnet is designed as a “canonical home for asset issuers,” enabling funds, commodities, currencies and equities to be created on the chain before moving across other ecosystems through Circle’s interoperability tools. Tokenized money market funds like USYC and BlackRock’s BUIDL are also joining Arc Mainnet.
10B ARC Tokens Minted at Genesis
Circle completed the genesis mint of 10 billion ARC tokens as Arc Mainnet went live, stressing that the mint does not signal a public token launch. The network currently uses proof of authority, with a planned transition to proof of stake in 2027 that could give ARC roles in governance and security while fees remain in USDC. With more than 700 million testnet transactions processed since 2025, Arc Mainnet now stands as Circle’s new growth engine, a platform Allaire expects to become one of the leading destinations for institutional onchain finance.
