Circle names founding validators in Arc network launch date announcement

Circle (NYSE: CRCL) has announced that its Arc blockchain will go live on public mainnet on September 16. It also announced 11 founding validators for the network, and they include BlackRock, Visa, Mastercard, and The Depository Trust & Clearing Corporation (DTCC), among others.

The blockchain has been running a private mainnet that has institutional builders on it, and the announced date for a public mainnet sets another milestone for a project that already has some of the biggest names in global payments as its founding validator cohort.

Who are the names that make up Arc’s founding validator cohort?

Alongside Circle, BlackRock, DTCC, Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, and Visa are the network’s founding validator cohort.

Circle stated that the network is secured by the institutions that run on it. It says that this model makes it “meet the trust, security, operational, and compliance standards required of critical financial market infrastructure.”

Anthony Soohoo, Chairman and CEO, MoneyGram, stated, “Arc reflects where the industry is heading: trusted, compliant, and unified infrastructure that makes stablecoins practical for real-world payments.”

What exactly is Arc built for?

Arc is Circle’s stablecoin-focused layer-1 blockchain. Circle refers to it as an “economic operating system” for financial markets and, increasingly, for software agents that move money on their own. It is currently in private mainnet with more than 100 ecosystem and institutional builders, according to Circle, after running as a public testnet that launched in October 2025.

The network is built around Circle’s dollar-pegged stablecoin, USDC, which the company reported had $73.3 billion in circulation at the end of the second quarter.

According to Circle, Arc offers fast settlement, transaction fees priced in stablecoins, and privacy controls. The September 16 launch will add a full product suite that includes privacy features, an agent stack for programmable finance, and support for tokenized real-world assets.

Circle was paid to build up the project this year. In May, it raised $222 million in a token presale led by Andreessen Horowitz, which contributed $75 million, giving Arc a $3 billion network valuation. BlackRock, SBI Group, and Standard Chartered Ventures were among the other backers, several of whom now appear on the validator list.

Is BlackRock’s BUIDL going on Arc?

In its announcement, Circle mentioned that BlackRock plans to deploy its BlackRock USD Institutional Digital Liquidity Fund, known as BUIDL, on Arc using the network’s built-in USDC integration. It will be letting institutional investors subscribe, redeem and deploy fund assets in one on-chain environment.

Circle also mentioned that it is working with DTCC to enable tokenization of assets held at The Depository Trust Company on Arc beginning in the second half of 2027.

The plan would let market participants use third-party applications on Arc for stablecoin-native settlement while referencing DTC-tokenized assets.

Circle says this would keep the same investor rights and protections as traditionally held securities. BNY and Standard Chartered are also exploring integrations spanning custody, stablecoin access, and FX and repo infrastructure.

Why is Circle launching Arc’s public mainnet now?

The public mainnet and validator announced the same day it released its second-quarterresults. The results showed that Circle’s positioning as a regulatory-compliant company alongside its infrastructure offerings has generated some yield and helped offset a slower market.

Circle reported $701 million in total revenue and reserve income, which is up by 7% year over year. It also reported $48 million in net income from continuing operations. USDC onchain transaction volume reached $14.8 trillion in the quarter, which was a 151% jump from a year earlier.

In July, the company received final approval from the Office of the Comptroller of the Currency to run a national trust bank, Circle National Trust. It was granted a limited purpose trust charter from the New York Department of Financial Services the same month.

More recently, Circle announced that it bought most of IBM’s blockchain patent portfolio, becoming the largest US holder, with Arc named as one of the products the patents would support.

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