The ledger bleeds red when trust decays into code.
Over the past year, USDC’s circulating supply surged 72%, crossing $75 billion. Headlines celebrated Circle’s victory lap over Tether’s opacity. But when I dissected Circle’s 10-K filing—a rare window into a stablecoin issuer’s finances—the numbers told a different story. The growth is real, yes, but it is purchased at an unsustainable cost. The company paid $1.4 billion in distribution fees in 2025 alone, consuming 51% of its total revenue. We are auditing the ghost in the machine’s soul—and finding a business model built on a single, fragile partnership.
Context
Circle is the issuer of USDC, the second-largest dollar-pegged stablecoin by market cap. Unlike Tether, Circle has positioned itself as the compliant, audited alternative, publishing monthly reserve reports and recently receiving OCC approval to establish a national trust bank. Its primary revenue source is the interest earned on the U.S. Treasury bills backing USDC—what the industry calls "reserve income." In 2025, that income reached approximately $2.75 billion. But distribution costs—the fees paid to exchanges, wallets, and protocols to incentivize USDC adoption—ate up $1.4 billion, leaving a net margin of 39%, identical to 2024. The headline growth has not translated into operating leverage. The majority of that distribution cost flows to a single partner: Coinbase.
Core Insight: The Distribution Tax
Circle and Coinbase signed their current revenue-sharing agreement in August 2023, with an initial three-year term expiring in August 2026. Under the deal, Coinbase receives a large portion of the reserve income generated from USDC held on its platform. The exact split is undisclosed, but my analysis of the 10-K data suggests Coinbase’s cut represents roughly 35–40% of Circle’s total reserve income. This is not a typical partnership; it is a tax. Every new dollar of USDC issued via Coinbase carries a variable cost that eats into Circle’s profit.
I have seen this pattern before—in the FTX collapse, where hidden leverage layers masked insolvency. Here, the leverage is not debt but dependency. Circle’s cost structure is dangerously concentrated. If Coinbase were to renegotiate terms or shift its support to a competing stablecoin, Circle’s margins would collapse overnight. The 72% circulation growth is largely driven by Coinbase’s aggressive marketing of USDC for trading pairs and yield products. Without that channel, USDC’s supply might have grown only 20–30%.
We are auditing the ghost in the machine’s soul—and the ghost is not just Circle, but a duopoly on distribution. The ledger reports revenue but hides the counterparty risk.
Contrarian Angle: The Real Threat Is Not Tether
Conventional wisdom pits USDC against USDT, but the 10-K reveals a more insidious competition—one from within. Coinbase itself is a founding participant in Open USD, a consortium of over 140 firms including Visa and Mastercard that plans to launch a revenue-sharing stablecoin. Open USD will distribute reserve income back to consortium members after deducting operating costs. If Open USD gains traction, Coinbase’s incentive to prioritize USDC diminishes. The very partner Circle depends on could become its gravedigger.
Simultaneously, platforms like Hyperliquid are rewriting the value-capture playbook. Hyperliquid’s AQAv2 framework redirects approximately 90% of the reserve income from USDC held on its exchange to Hyperliquid’s own treasury. It keeps USDC as the underlying asset for liquidity while stripping economic value from Circle. JPMorgan recently flagged this as a near-term earnings headwind for both Circle and Coinbase. The message is clear: stablecoin issuers are becoming commodity utilities, and protocols are extracting the rents.
Takeaway
Circle is not just fighting Tether; it is fighting its own distribution network. The August 2026 agreement reset with Coinbase is the most important event in stablecoin markets over the next two years. If Circle can renegotiate a lower fee split or diversify its distribution, the 39% margin may hold. If not, the cost structure will erode further. I am watching for signs of decoupling—new direct partnerships with wallets or DeFi protocols that bypass Coinbase. But the ledger never lies: right now, USDC’s growth is a hollow expansion, and the market has not priced the risk that the ghost at the center is already bleeding.