Circle's Arc blockchain now holds more than $1 billion in USDC, a supply that grew by roughly 109% over the past 30 days. The milestone was first recorded on October 27, 2026, according to third‑party trackers usdc.cool and DefiLlama.
Timeline and growth
Arc’s public mainnet launched on September 16, 2026. Within about six weeks, the network’s USDC balance reached ten figures, with later snapshots placing the supply between $1.003 billion and $1.1 billion. By early November 2026, total stablecoin supply on Arc was approximately $1.098 billion, of which USDC accounted for about $1.088 billion, representing a 99.18% market share on the chain.
Context
The increase occurred while the broader global stablecoin market contracted in late October, highlighting a divergent trend for Arc.
Address concentration
At the $1 billion level, the top four addresses on Arc held roughly 73% of the USDC supply. The identities behind these addresses are not disclosed; they could belong to exchanges, custodians, market makers, protocols, or large individual holders. This concentration influences how the growth figure should be interpreted and may affect the durability of the supply level.
Implications
The rapid accumulation provides Circle with an early data point for Arc’s performance. The near‑total dominance of USDC suggests the network is currently a single‑stablecoin ecosystem. Observers will likely monitor three factors: whether the 30‑day growth rate sustains, if address concentration eases, and whether additional stablecoins achieve meaningful presence on Arc.
