Circle’s second-quarter results arrived with a strong number at the top: $701 million in total revenue and reserve income, up 7% from a year earlier. But the more consequential story is below the earnings headline. At the same time that Circle reported its financial results, it described an institutional network for Arc, its blockchain infrastructure project, with BlackRock, DTCC, Mastercard, Visa, and seven other major financial companies joining the founding validator cohort.
The Earnings Numbers Show a Stablecoin Business Scaling
Circle reported that USDC in circulation reached $73.3 billion at the end of the second quarter, a 19% year-over-year increase. USDC on-chain transaction volume reached $14.8 trillion during the quarter, up 151% from the same period a year earlier. Those figures matter because they show growth in both the supply of the dollar-backed stablecoin and the amount of activity moving across networks.
Reserve income remained the core of the business. Circle reported $668 million in reserve income, up 5% year over year, while other revenue reached $34 million, up 41%. The company said total revenue and reserve income were affected by a decline in the reserve return rate, even as average USDC in circulation increased. In other words, the business is growing its base while the economics of holding reserves are becoming less generous.
Circle also reported $48 million in net income from continuing operations and adjusted EBITDA of $143 million. Adjusted operating expenses rose to $146 million as the company continued investing in product development, infrastructure, and artificial intelligence capabilities. Startup Fortune’s coverage framed the quarter as a slower-growth result that nevertheless came with a much larger strategic announcement: Arc is approaching its public mainnet launch.
Arc Is the Bigger Strategic Bet
Circle said Arc had more than 100 ecosystem and institutional builders and was on track for a public mainnet launch on September 16, 2026. The project is being positioned as an open blockchain network for financial markets, real-time money movement, and agentic economic activity. It is not being presented as another consumer token network. Its target is the plumbing behind settlement, payments, tokenized assets, foreign exchange, and other institutional flows.
The founding validator cohort includes BlackRock, the Depository Trust and Clearing Corporation, Galaxy, Global Payments, ICE, Mastercard, MoneyGram, SBI Group, Standard Chartered, Sumitomo Corporation, and Visa, alongside Circle. That list is the point. The network is trying to make institutional participation part of its security model from the beginning, rather than waiting for banks and payment companies to arrive after the technology is already built.
Circle said BlackRock, BNY, DTCC, and Standard Chartered are exploring integrations that span tokenized asset settlement, digital asset custody, stablecoin access, and foreign exchange and repo infrastructure. The company also said BlackRock is expected to deploy BUIDL, its institutional digital liquidity fund, on Arc. DTCC is expected to work with Circle on tokenizing assets held in its custody system beginning in the second half of 2027.
From Stablecoin Issuer to Network Operator
The distinction is important. Circle’s original economic engine is tied to USDC circulation and the income generated by its reserves. Arc gives the company another layer to control: the network where financial institutions might use that stablecoin. If the chain becomes a settlement rail, Circle can be closer to the movement of assets and money rather than simply issuing one of the instruments used in those transactions.
That strategy also explains why validator membership matters. A financial institution does not need to treat a chain as a trusted market infrastructure layer merely because a technology company says it is reliable. The participation of major custodians, exchanges, payment networks, banks, and market operators creates a governance and operational signal. It does not guarantee adoption, but it makes the project legible to the institutions whose standards Circle needs to meet.
The Regulatory Footing Is Part of the Product
Circle said it received final approval from the U.S. Office of the Comptroller of the Currency to establish Circle National Trust, a national trust bank. It also received approval from the New York Department of Financial Services to open Circle New York Trust as a limited-purpose trust company focused on digital assets. Circle said the federal charter will support regulated custody and could eventually allow the company to manage the USDC reserve under a federally regulated structure.
Those approvals are not separate from Arc’s pitch. Institutional customers want faster settlement and programmable assets, but they also need clear custody, compliance, and operational responsibilities. Circle is trying to present the reserve, the issuer, the bank charter, and the new chain as parts of one controlled system.
Circle’s quarter is not only a growth story
The company said reserve income was $668 million and that the reserve return rate declined 66 basis points. That pressure is a reminder that a larger stablecoin supply does not automatically produce the same level of profit. Arc and related services are intended to broaden the business beyond the interest economics of reserves.
Analysis: The Network Effect Starts Before the Mainnet
Circle’s challenge is execution. Eleven large institutions joining as validators is a powerful starting signal, but a validator list is not the same as transaction volume. The September 16 public launch must turn institutional interest into products that solve actual settlement and liquidity problems. The key milestones will be integrations that reduce friction, not announcements that merely add another logo to a consortium page.
The strategic logic is nevertheless clear. Stablecoins have moved from a narrow crypto payment tool toward infrastructure for dollars, collateral, and cross-border settlement. Circle wants USDC to be the money and Arc to be the network that makes that money useful inside institutional markets. The $701 million quarter shows the current business is growing. The validator cohort shows where Circle wants the next phase of value to accumulate.