Tether's US-focused dollar stablecoin, USAT, grew 540% in April. As of April 30, 2026, its supply stood at $140.8 million, up from $22 million in March. The percentage is the kind of number a press release leads with. The dollar figure is the one that matters, and it tells a quieter story: USAT is a fraction of a percent of the market it is built to compete in. A big move off a small base is still small.
What the numbers actually say
USAT's circulating supply rose more than sixfold last month, to $140.8 million from $22 million. The reserves backing the token climbed in step, to $141.2 million from $22.2 million in March. So the growth is real, and the reserves moved with the supply rather than lagging it.
Now the comparison that the percentage hides. Circle's USDC sits near $76 billion. PayPal's PYUSD is around $5.5 billion. Ripple's RLUSD is near $1.7 billion. And Tether's own flagship token, USDT, carries a market value near $189 billion. Against any of those, USAT's $140.8 million is a rounding error. It is roughly two-tenths of a percent of USDC, and well under a tenth of a percent of USDT.
USAT launched in January, issued by Anchorage Digital, a federally chartered crypto bank. That charter is the point of the product. Tether's main token, USDT, has spent years operating outside the US regulatory perimeter, and USAT is the company's attempt to field a dollar token a US institution can hold without that baggage. Bo Hines, CEO of Tether USAT, said the growth reflects "increased use across institutional treasury operations, settlement flows, and regulated dollar liquidity management."
Why a growth rate is the wrong yardstick here
A stablecoin is not a startup, where a 540% month signals something is catching. It is closer to a money-market product, and those live or die on size and track record, not momentum. A holder wants to know the token will sit at par when they redeem it, and that confidence comes from years of the peg holding through stress, deep liquidity across exchanges, and a reserve they can trust. None of that is captured in a one-month percentage.
This is why USDC and USDT dominate despite years of competitors launching with better marketing and, often, better disclosure. They were early, they are large, and large is itself a feature: the bigger the float, the easier it is to move size without slippage, and the more venues quote it. A new token, even a well-backed one, starts that flywheel from a standstill. Hines' "institutional treasury operations" framing describes the customer Tether wants, not a base it has yet won at scale.
What the announcement does not tell you
The reserve total tells you the token is fully backed at $141.2 million. It does not, on its own, tell you what those reserves are held in or who checks them, and those are the questions that decide whether a dollar token is worth its peg under pressure. With any stablecoin, the two things to ask are who holds the reserves and who audits them. A clean ratio on a given date is the floor, not the answer.
The 540% figure also flatters because the starting point was so low. Going from $22 million to $141 million is a meaningful step for a five-month-old product, but the next sixfold move, to roughly $850 million, would still leave USAT short of RLUSD, and a fraction of PYUSD. The hard part is not the first $100 million. It is the climb from a niche institutional float to the tens of billions where the incumbents sit.
What we are watching
Whether USAT's supply keeps compounding or stalls once the early institutional onboarding runs its course. One month is a data point, not a trend, and a stablecoin that wants to matter has to show the float holds and grows across several prints, not one. The reserve composition and an independent attestation are the other thing to watch: a US-chartered issuer invites a higher bar on disclosure than Tether has historically met, and USAT will be judged against that bar, not against a percentage.