Circle built a blockchain where USDC pays the fees, and the validators are names like BlackRock and Visa
Circle's Arc is scheduled to open its public mainnet on 16 September: an EVM-compatible Layer 1 where the USDC stablecoin itself pays for gas, secured by a closed set of institutions including BlackRock, Visa, Mastercard and DTCC. It is open to build on and closed to validate, and the separate ARC token is not the gas and has no confirmed trading date. Here is what is actually launching.
Circle, the company behind the USDC stablecoin, is scheduled to open the public mainnet of Arc on 16 September 2026: an EVM-compatible Layer 1 blockchain where USDC pays transaction fees instead of a separate gas token. Its block producers are a closed set of 11 institutions plus Circle, including BlackRock, Visa, Mastercard, ICE and DTCC. Anyone can build on it, but only those named firms validate. There is also a separate ARC governance token, which is not the gas and has no confirmed trading date. This is not investment advice.
Most blockchains are built the way a public square is: anyone can show up, anyone can help run the thing, and you pay fees in a volatile native coin. Circle has just built something closer to a members' clubhouse for institutional money. Its new chain, Arc, is designed so that the dollar-pegged stablecoin USDC pays the fees, and so that the machines keeping the network honest belong to a hand-picked list of banks, card networks and asset managers. It is a striking bet on what "crypto for institutions" actually looks like, and it is worth being precise about what is launching, what is only being explored, and where the easy misreadings lie.
What is Circle's Arc?
Arc is Circle's own open, EVM-compatible Layer 1 blockchain, which the company brands an "Economic OS" and pitches as purpose-built for stablecoin finance and institutional settlement. The defining design choice is that USDC pays for gas: transaction fees are denominated in the stablecoin rather than in a separate, price-swinging native coin, with a fee manager that smooths costs. Circle first announced Arc in August 2025 and ran a public testnet and then a private mainnet before this step.
Has it launched yet?
Not as of this writing. Circle has scheduled the public mainnet for 16 September 2026. Some coverage is forward-dated and reads as though the chain is already live, so treat the 16th as the scheduled opening rather than an accomplished fact. At that point, Circle says, the production blockchain opens to users and applications, meaning anyone can deploy contracts and transact, while block production stays within the permissioned validator set. Ahead of launch the company cited more than half a billion testnet transactions and nearly 3 million wallets.
Who runs it, and does that mean BlackRock and Visa are running a blockchain?
Sort of, with a big caveat. The founding validator cohort is 11 named institutions plus Circle: BlackRock, DTCC, Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation and Visa. Those firms secure the network. That is genuinely notable, and it is also where hype outruns reality.
Two things to keep straight. First, Arc is permissioned: it runs on a closed Proof-of-Authority set, so anyone can build on it but only the named institutions validate. It is open to use, closed to run, which is not the same as a permissionless public chain like Ethereum. Second, validating a chain is not the same as pushing live business through it. Circle frames several of the integrations as exploratory: it says partners including BNY, DTCC and Standard Chartered are each exploring uses spanning custody, tokenised-asset settlement, stablecoin access, and FX and repo infrastructure. And some flagship use cases are dated well into the future: DTCC's tokenisation of custodied assets is slated to begin only in the second half of 2027. BlackRock is expected to deploy its tokenised money-market fund, BUIDL, at launch; much of the rest is a roadmap.
Hold on, is there an ARC token? I thought USDC was the gas?
Both exist, and conflating them is a common error in the coverage. USDC is the gas token that pays fees. ARC is a separate native token for governance and incentives, and the basis for a possible future shift to Proof-of-Stake. It is not the gas, and it is not USDC.
ARC has its own, separate history. Around 11 May 2026, Circle agreed to sell 740 million ARC tokens at 30 cents each, raising 222 million dollars, at a 3 billion dollar fully diluted valuation, with a16z crypto leading at roughly 75 million. That 3 billion figure is the token presale's valuation, not the value of the chain or of Circle the listed company, and headlines that blur them are wrong. Crucially, the token generation event has no confirmed public date, and it is distinct from the 16 September mainnet. Do not assume ARC is trading when the chain goes live.
How is it built, and how fast?
Under the hood, Arc uses a Tendermint-derived Byzantine-fault-tolerant engine called Malachite, where more than two-thirds of validators must agree to commit a block, and Paradigm's Reth client for full EVM execution, so standard Ethereum tooling works. Circle's own materials state deterministic finality in under a second, benchmarked in the low hundreds of milliseconds, and around 3,000-plus transactions per second in a 20-validator test configuration, though the chain opens with 12 block producers. An opt-in confidential-execution layer is planned rather than on by day one. Those performance figures are Circle's stated benchmarks, not independently measured throughput under load.
Why is Circle doing this?
The likely logic: owning the rails is more valuable than renting them. USDC is the number-two stablecoin, with roughly 74 to 75 billion dollars in circulation, about a quarter of a stablecoin market of around 305 billion, behind Tether's USDT at roughly 184 billion. Today most of that USDC settles on chains Circle does not control. Arc looks like a move to own the settlement layer where USDC lives, and to offer institutions a venue whose validators are the kind of regulated names they already deal with. Whether those institutions route real volume through it, rather than simply lending their name to the validator list, is the open question the next year will answer. For the wider shift, see our look at Wall Street's tokenisation push and the rest of the crypto section.
What is live on day one vs later
| At launch (16 Sep) | Later | |
|---|---|---|
| USDC as gas | Yes | |
| Open app deployment, EVM tooling | Yes | |
| Validators | 11 institutions plus Circle (permissioned) | Possible move toward Proof-of-Stake |
| BlackRock BUIDL fund | Expected at launch | |
| DTCC asset tokenisation | From H2 2027 | |
| Confidential/privacy layer | Opt-in, planned | |
| ARC token trading | No confirmed date |
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