Circle's new blockchain crossed the milestone about six weeks after its mainnet launch, even as global stablecoin supply contracted
Circle’s Arc blockchain now holds more than $1 billion in USDC. That supply grew 109.4% over the past 30 days.
Put plainly, the amount of USDC sitting on Arc more than doubled in a month. For a network that opened its public mainnet in mid-September, the pace is fast.
The timing makes it more interesting. Arc kept growing while the global stablecoin market was shrinking.
The numbers behind the milestone
USDC supply on Arc first passed $1 billion on October 27, 2026. Third-party trackers usdc.cool and DefiLlama both confirmed the milestone.
Arc’s public mainnet went live on September 16, 2026. The network hit ten figures roughly six weeks later.
Later snapshots put Arc’s USDC supply somewhere between $1.003 billion and $1.1 billion. Over the 30-day window, growth landed at around 109% to 112%, depending on the tracker and the moment of measurement.
By early November 2026, total stablecoin supply on Arc stood at approximately $1.098 billion. USDC made up about $1.088 billion of that figure.
That works out to 99.18% market dominance for USDC on the chain.
Why the timing stands out
In late October, the global stablecoin supply contracted. Arc’s balance climbed through that same stretch.
The concentration question
There is a caveat worth weighing alongside the headline growth. At the $1 billion mark, the top four addresses on Arc held approximately 73% of the USDC supply.
Address concentration does not reveal who owns those wallets. Blockchain addresses can belong to exchanges, custodians, market makers, protocols, or a single large holder, and a few addresses can represent many end users.
Still, it changes how the number should be read. A $1 billion supply spread across thousands of active wallets suggests broad organic usage, while a $1 billion supply mostly held in a handful of addresses suggests something closer to a few big deposits.
It also matters for durability. If a small number of holders move their balances elsewhere, the supply figure could fall just as quickly as it rose.
What this means for Arc and USDC
For Circle, crossing $1 billion within about six weeks of mainnet gives Arc a credible early data point.
The 99.18% USDC share shows Circle’s token is firmly anchored on its own network, but it also means Arc is, for now, effectively a single-stablecoin ecosystem.
Three things are worth watching from here. First, whether the 30-day growth rate holds as the network moves past its launch window. Second, whether the top-address concentration eases over time. Third, whether other stablecoins start to appear in meaningful size on Arc.
