Circle launches Arc blockchain with BlackRock, Visa as validators

Circle Internet Group ↗ 5.77% on Wednesday launched the public mainnet for Arc, a Layer 1 blockchain designed for payments, trading, and AI-agent transactions, backed by a founding validator cohort that reads like a who's who of global finance. Despite the announcement, shares of Circle fell around 7%, extending losses from a broader crypto selloff triggered by the U.S. Senate's failure to advance the CLARITY Act a day earlier.thestreet+1

A Blockchain Built for Wall Street

Arc launches with BlackRock ↗ 1.61%, the Depository Trust & Clearing Corporation, Galaxy, Intercontinental Exchange ↘ 0.52%, Mastercard ↘ 0.36%, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, Visa ↘ 0.27%, and Global Payments ↘ 1.26% as founding validators — meaning these institutions will help operate and secure the network itself.circle

Circle CEO Jeremy Allaire called Arc "the single most significant launch in Circle's history since USDC itself". The network's key differentiator is that transaction fees are paid in USDC rather than a volatile native token, a design choice aimed at making costs predictable for institutional users. Arc delivers sub-second deterministic finality, with benchmarks showing settlement in under 350 milliseconds.cryptopolitan+2

More than 100 applications and 100 institutional builders are live from day one, including DeFi protocols Aave, Morpho, and Uniswap ↗ 1.80%, along with exchanges such as Binance, Coinbase ↗ 5.75%, and Kraken. Banks including BNY The Bank of New York Mellon Corporation ↘ 0.29%, HSBC ↗ 1.98%, State Street ↗ 0.09%, and Societe Generale Société Générale have access to the network.circle

"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, BlackRock's global head of digital assets.circle

Stock Slide Tied to CLARITY Act Setback

Circle's stock decline on Wednesday had less to do with Arc and more to do with fallout from the Senate's 49-50 procedural vote on the CLARITY Act on Tuesday, which fell short of the 60 votes needed to advance the crypto market structure bill. The vote failure hit crypto stocks broadly, with Coinbase and Galaxy also dropping sharply on Tuesday.coindesk+1

The bill's stalling is particularly consequential for Circle because unresolved questions around yield-bearing stablecoins — and the banking industry's concerns about deposit flight — remain central to the legislative debate. Circle also minted 10 billion ARC tokens this week, becoming the first publicly traded company to create a network token for a new Layer 1, though the token is not publicly available and fees remain in USDC.thestreet+3

Critics Question Decentralization

Arc currently runs on proof of authority with a permissioned validator set, a structure that made institutions comfortable enough to participate but has drawn questions about whether the network is truly a public blockchain or a private settlement rail with a public interface. Circle has said a transition to proof of stake is being explored for 2027.cryptopolitan+1