Circle has launched Arc, a Layer 1 blockchain for payments, trading, and AI-agent transactions, with BlackRock, DTCC, Visa, and Mastercard among its founding validators. It went live a day after the Senate blocked the CLARITY Act.

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On the same afternoon the crypto industry absorbed one of its heaviest legislative defeats in years, Circle Internet Group flipped a switch that placed some of the largest names in global finance inside the machinery of a public blockchain. The company took Arc, an open Layer 1 network it has spent years developing, live on public mainnet, and it did so with a founding validator group pulled straight from the institutions that already run the world's financial plumbing.

Arc is engineered for financial markets rather than retail speculation, and fees are paid in USDC, Circle's regulated dollar stablecoin with more than 74 billion dollars in circulation, so the network carries no volatile native token for users to manage. Transactions settle in under a second and can't be reversed, and the chain runs existing Ethereum tooling and Solidity contracts without rewrites. Circle brought the network online with more than 100 applications and more than 100 institutional and ecosystem partners already active, spanning banks, asset managers, payment networks, exchanges, custodians, and AI platforms.

A Network Run by the Institutions it Serves

What separates Arc from the long line of enterprise blockchain experiments is that the institutions running global finance are not just using the network, they are the ones securing it as well. BlackRock, The Depository Trust and Clearing Corporation, Intercontinental Exchange, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa, Worldpay, and Galaxy sit in the founding validator cohort alongside Circle. These are firms that clear securities, run card rails, and manage trillions in assets, and on Arc they are not merely connecting to the network, they are helping operate and secure it. Notably, no crypto-native firms appear in that founding group.

“Arc is the single most significant launch in Circle's history since USDC itself, and it is the embodiment of the premise we have operated on for thirteen years: money should work the way the internet works,” said Jeremy Allaire, Co-Founder, Chairman, and CEO of Circle. “USDC was step one. Arc is the network built for what comes next. The agentic economy and the onchain economy are not two different revolutions; they are the same economy seen from two sides, and both need infrastructure that never closes, settles in under a second, and is trusted by the institutions that anchor the global financial system. Today we are switching on something the world has never had before: an open, neutral, always-on economic operating system for the internet, secured by some of the most important financial institutions on Earth, and built for a world where both people and machines transact.”

Incidentally, the launch landed just a day after the Senate blocked the Digital Asset Market Clarity Act, the industry's central legislative priority, on a procedural vote that drew only 49 of the 60 votes it needed, with every Democrat and four Republicans opposed. Circle shares slid more than 6 percent in midday trading even as the network went live. Speaking to CNBC, Allaire said policy tends to be responsive to what is happening in the real economy, pointed to the hundreds of companies already building on the technology, and said the industry “isn't stopping.” His view, in effect, is that the infrastructure will define the rules before the legislators do.

Designed for Machines as Much as People

Beneath the roster sits a set of engineering choices aimed squarely at the concerns that keep regulated institutions off most blockchains. Arc offers opt-in privacy with view keys for auditors, supports post-quantum signatures today, and uses a permissioned validator model with a defined governance perimeter, a structure meant to let a bank touch a public chain without breaching its own compliance mandates. Circle is pairing the network with StableFX for round-the-clock currency settlement and with tokenized assets such as BlackRock's BUIDL treasury fund and Circle's own USYC money market fund to serve as collateral.

That is the combination Circle is selling, and one of Arc's most prominent backers framed it as a broader shift in how blockchains get built.

“As digital assets infrastructure matures, we expect to see certain networks increasingly designed around the needs of specific markets and use cases. Purpose-built blockchains can help accelerate adoption of digital asset use cases, and Arc appears clearly well positioned to serve stablecoin and payment use cases at scale,” said Robbie Mitchnick, Global Head of Digital Assets at BlackRock.

The friction Arc targets is familiar to anyone who has tried to run institutional volume across a general-purpose chain, where fees swing with token prices and finality is probabilistic rather than final.

“ICE's institutional customers are increasingly looking for ways to operate seamlessly across traditional and digital markets. Arc's native capabilities, including predictable fees and instant finality, address real friction points these customers raised,” said Michael Blaugrund, VP, Strategic Initiatives at ICE. “As a founding validator, ICE is applying our experience securing critical market infrastructure in support of Arc itself, reflecting our clients’ emerging demand for tokenized finance.”

The most forward-looking piece of Arc is its design for software that transacts on its own. Circle describes Arc as the first blockchain built from genesis for AI agents as economic actors, meaning programs that execute trades, route liquidity, and settle contracts without a human approving each step. The company says USDC already accounts for 98.8 percent of agent-driven transaction volume, and Arc ships with agent wallets, programmable spending limits, and nanopayments so that an agent can be funded, constrained, and audited. As autonomous software begins to handle real money, a settlement layer that never closes and cannot be reversed shifts from novelty to requirement.

Aave and Morpho, two of the largest decentralized lending protocols, anchored Arc's borrowing and lending at launch, giving institutions a venue to post tokenized assets and draw stablecoin liquidity around the clock.

“Aave has worked with Circle for years, growing USDC and EURC liquidity into billions of dollars. We're doubling down on the Circle ecosystem with a new Aave V4 market on Arc, bringing DeFi's most trusted credit infrastructure to a network purpose-built to bring real-world finance onchain,” said Stani Kulechov, Founder and CEO of Aave Labs.

The ARC Token and the Road to Proof of Stake

Circle also completed the genesis mint of its ARC token this week, creating the full initial supply of 10 billion units and becoming the first publicly traded company to mint a network token for a new Layer 1. The company framed the milestone in careful terms, saying the mint is not a commitment to publicly launch ARC, but a step toward a possible shift from proof of authority to proof of stake in 2027. Investor appetite is already visible, with Circle having raised 222 million dollars in an Arc token presale at a 3 billion dollar valuation.

Two roads to the same destination

Ripple is also chasing the same prize with its RLUSD stablecoin, and it has chosen to buy the rails rather than recruit validators to guard them. RLUSD's market value has climbed to roughly 2.345 billion dollars, and Ripple has spent heavily to embed the token into existing workflows, acquiring the prime broker Hidden Road, now Ripple Prime, for 1.25 billion dollars and the treasury software firm GTreasury for 1 billion dollars. Where Circle is building a network and trusting a set of financial giants to secure it, Ripple is assembling a vertically integrated stack that owns the broker, the treasury software, and the settlement asset.

Taken together, the two strategies frame a debate about how tokenized finance takes hold. One camp treats trust in the named participants as the product, the other treats control of the entire workflow as the product, and both are advancing while federal legislation stalls in Washington. For business leaders, the practical signal is that the infrastructure of onchain finance is being built now, by the same institutions they already depend on, and the advantage will accrue to whichever platform makes settlement so reliable that no one has to think about the chain running underneath it.

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