Circle confirms Sept. 16 Arc launch as BlackRock, Visa join validator group

Circle has announced that its Arc blockchain will launch on the public mainnet on Sept. 16, with BlackRock, DTCC, Mastercard, Visa, Standard Chartered, and other global financial institutions serving as founding validators.

According to Circle, Arc is currently running on a private mainnet with more than 100 institutional and ecosystem participants, ahead of its public mainnet launch scheduled for Sept. 16. 

The company said BlackRock, The Depository Trust & Clearing Corporation (DTCC), Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation and Visa will join Circle as the network’s founding validators, helping secure and govern the blockchain from launch.

Arc launches with financial institutions as validators

Circle said the validator model is designed around institutions that are also building on the network rather than relying on independent operators. According to the company, the structure is intended to meet the operational, compliance and security requirements expected of financial market infrastructure while supporting open blockchain applications.

The announcement also confirms that Arc has moved into a private mainnet phase after earlier operating through a public testnet. Circle had previously said more than 100 organizations, including banks, asset managers and blockchain companies, were testing the network before launch.

Mastercard Chief Product Officer Jorn Lambert said the future of payments will depend on different payment rails and forms of value working together rather than a single network. He said Mastercard’s role as a founding validator aligns with its work to connect blockchain-based payment systems with traditional financial infrastructure.

MoneyGram Chairman and CEO Anthony Soohoo said the company joined Arc because it views compliant blockchain infrastructure as necessary for stablecoins to support real-world money movement. Standard Chartered Global Head of Transaction Services and Digital Assets Ole Matthiessen said institutional adoption of digital assets requires infrastructure that satisfies regulatory and operational standards, adding that the bank views Arc as infrastructure for secure onchain financial applications.

Visa Global Head of Growth Product and Partnerships Rubail Birwadker said the company expects trusted blockchain infrastructure to support the expansion of onchain payments and confirmed Visa will participate as a network validator.

BlackRock and DTCC plan Arc integrations

Circle also detailed several institutional integrations expected to accompany Arc’s public mainnet launch.

BlackRock plans to deploy its BlackRock USD Institutional Digital Liquidity Fund (BUIDL) on Arc using the network’s native USDC integration. According to Circle, institutional investors will be able to subscribe, redeem and deploy fund assets within a single onchain environment.

Robert Mitchnick, BlackRock’s Global Head of Digital Assets, said the deployment aligns with the growing role of stablecoins in financial markets.

“Stablecoins and tokenized assets are inextricably linked within the future of financial market infrastructure. Purpose-built rails like Arc can support faster settlement, improved collateral mobility, and broader institutional adoption of digital assets.”

Circle is also collaborating with DTCC to enable tokenization of assets held at The Depository Trust Company (DTC) on Arc beginning in the second half of 2027. 

According to the company, the integration is intended to let market participants use third-party applications on Arc for stablecoin-native settlement outside of DTC while referencing DTC-tokenized assets. Circle added that the assets will continue to provide investors with the same rights and protections as traditionally held securities.

The company said the planned integration supports DTCC’s multi-chain strategy, which focuses on accelerating settlement, extending trading hours, improving asset mobility and reducing operational costs through distributed ledger technology.

Arc expands ecosystem before public mainnet

Circle said several decentralized finance protocols, payment providers, exchanges and wallet companies are preparing to support the network when it launches.

According to the announcement, Aave, Aerodrome, FalconX, Galaxy, GSR, Keyrock, Morpho, Nonco, Uniswap and XFX are expected to provide borrowing, trading and liquidity services on Arc.

Payment providers including Rain, Thunes and Wirex are preparing to route stablecoin payment and settlement activity through the network. Circle also listed Binance Wallet, Chainlink, Fireblocks, Kraken, Ledger, MetaMask, Uniswap Labs and Upbit among wallet and infrastructure providers expected to support access to USDC, custody services and cross-chain asset transfers.

Jeremy Allaire, Circle’s co-founder, chairman and CEO, said the combination of institutional validators and more than 100 enterprise and ecosystem builders already operating on Arc’s private mainnet positions the blockchain for its Sept. 16 public launch.

Arc builds on earlier institutional roadmap

The latest announcement extends Circle’s institutional strategy for Arc that has been developing throughout the year.

In May, Circle launched the Arc blockchain initiative alongside a $222 million ARC token presale that valued the network at $3 billion on a fully diluted basis. At the time, the company described Arc as a public blockchain built for institutional finance with USDC serving as its native gas token, alongside features including sub-second finality, EVM compatibility and opt-in privacy.

Circle later introduced Arc Privacy, a confidential smart contract engine that allows businesses to keep selected transaction data and contract activity private while preserving access for compliance reviews and audits. According to the company, the technology is intended for institutional workflows such as treasury management, payroll, lending, tokenized assets and consumer payments.

Earlier in April, Circle also published a multi-stage quantum resilience roadmap for Arc. The company said quantum-resistant wallets and signature schemes would be available when the network launches, with additional protections for validators, infrastructure and off-chain systems planned in later phases.

Circle said it will introduce additional products alongside the Sept. 16 public mainnet launch, including a composable application framework for common onchain workflows, AI-assisted developer tools, services for issuing and managing tokenized real-world assets, and interfaces designed for developers, users and autonomous software agents operating on the Arc network.