BlackRock’s BUIDL ‘Doubled on Avalanche’ — Mostly by Moving Off Solana, and It’s Already Unwinding.
In mid-July, BlackRock’s tokenized Treasury fund, BUIDL, roughly doubled on Avalanche — to about US$907 million — and the milestone was reported as Avalanche pulling ahead in institutional tokenization. Read every chain the fund lives on, day by day, and a different picture appears: as Avalanche rose, BUIDL’s supply on Solana fell by almost the same amount, and within two weeks much of the Avalanche jump had unwound. The fund’s total actually grew. What looked like a chain winning was largely one issuer moving its own supply from one chain to another.
- In mid-July 2026, BlackRock’s BUIDL fund roughly doubled its supply on Avalanche — from about US$403M to about US$907M — the surge widely reported as Avalanche advancing in institutional tokenization. Read day by day across every chain, the move looks less like arrival and more like relocation (July 2026).
- On the same days Avalanche rose by about US$500M, BUIDL’s supply on Solana fell by about US$269M; within two weeks the Avalanche jump had largely unwound (back to about US$633M) as Solana recovered (to about US$654M). Every move is a real on-chain mint or redemption, verified against the fund’s contracts, with the fund’s NAV flat at US$1.00 throughout.
- BUIDL’s total across all chains grew over the period — from about US$2.10B to US$2.64B — so this was not money leaving the fund; it was supply moving between chains. A blockchain’s tokenized-asset ranking can therefore swing by hundreds of millions of dollars on one issuer’s routing decision, before any change in real demand.
In the middle of July, one number moved fast enough to make headlines: the amount of BlackRock’s tokenized Treasury fund held on Avalanche roughly doubled in a week, to about US$907 million. It was reported as a sign that Avalanche was pulling ahead as a home for institutional tokenization — a chain winning real money. The number was real. But a single chain’s balance, read on a single day, does not say where that money came from, or whether it stayed.
BUIDL does not live on one chain. It is issued on eight, and we read the fund’s supply on each of them, every day, from the funds’ own contracts. Line those daily readings up next to each other and the mid-July surge changes character. In the same window that Avalanche rose by about US$500 million, BUIDL’s supply on Solana fell by about US$269 million. The money did not so much arrive on Avalanche as move there — and mostly from one other chain.
Fig. 1
As BUIDL’s supply rose on Avalanche, it fell on Solana — then the move partly reversed.
BUIDL’s supply on Avalanche (green) and Solana (grey), in US$ millions, read daily from each chain’s contract. Avalanche roughly doubles in mid-July as Solana drops by almost the same amount; by late July the Avalanche jump has largely unwound and Solana has recovered. NAV was flat at US$1.00 throughout, so each move is a real mint or redemption, not a re-pricing.
The reversal came almost as quickly as the surge. Avalanche peaked near US$907 million around July 17, then fell back — to about US$736 million, then to about US$633 million by late July — while Solana climbed back to about US$654 million. Read only on its peak day, Avalanche had “doubled.” Read across the month, roughly half of that increase had already unwound, and much of what remained had come from another chain the same fund already occupied.
Why the total matters as much as the chain
The most important number here is the one the single-chain headline leaves out: the fund’s total. Across every chain, BUIDL grew from about US$2.10 billion to US$2.64 billion over these three weeks. So the Avalanche move was not investors pulling money out and the Solana move was not investors fleeing — the fund as a whole took in money. What shifted was where the same fund’s supply sat. Without the total in view, a rise on one chain reads as a win and a fall on another reads as a loss, when neither is quite true.
This is why a per-chain balance, on its own, is a fragile way to measure a blockchain. The amount of a fund sitting on a given chain is set by the issuer — which contract it mints on, which it redeems from — and an issuer can move it. When the same fund is issued natively on eight chains, its operator can shift hundreds of millions of dollars from one to another in a day, for reasons of its own. The on-chain balance is exact; what it signals is not.
What actually moved on Avalanche
None of this makes Avalanche’s footprint imaginary. BUIDL really is issued natively on Avalanche, and even after the reversal it remains the single largest tokenized-Treasury fund there — about US$633 million, or 78% of all the tokenized-Treasury value we measure on the chain. That concentration is itself worth knowing: Avalanche’s tokenized-Treasury standing is, to a first approximation, this one fund. The point is narrower and more useful than “Avalanche won” or “Avalanche lost.” It is that the headline figure moved because an issuer routed its supply, and the same figure can move again the same way.
Why BlackRock moved the supply when it did, we can see but not explain from the chain alone — the routing is visible; the intent behind it is the company’s. The useful discipline for anyone reading a headline that a chain has “doubled” its tokenized assets is to ask two questions the single number can’t answer on its own: did the fund grow, or did its supply just move — and did the money arrive, or is it visiting? On Avalanche in July, the answer was mostly the latter.
Why this matters now
This is more than a bookkeeping footnote, because the numbers it produces are being used to keep score. Tokenized real-world assets have grown into a multi-billion-dollar market this year, and blockchains now compete openly to be the venue institutions choose — pointing to their tokenized balances as proof of momentum, the way earlier cycles pointed to total value locked. When a chain’s figure can rise or fall by half a billion dollars because one issuer moved its own supply, per-chain balances become a noisy measure of exactly the thing everyone is trying to read: where tokenization is actually taking hold.
For an allocator or a chain’s backers, the distinction is not academic. A balance that arrived by routing can leave by routing; a balance built from many funds and many holders is harder to move and says more about durable demand. The tokenized-Treasury market is still concentrated enough that a single fund can define a chain’s standing — which means, for now, the more revealing question is less how much sits on a chain than how many independent decisions put it there. As more funds and issuers arrive, that may change. Until it does, the next time a chain is said to be winning the tokenization race, the number worth finding is not the one that moved — it is the one underneath it that didn’t.
BUIDL supply by chain, US$: Jul 9 — Avalanche $403M, Solana $630M. Jul 15–17 (peak) — Avalanche ~$903–907M, Solana ~$361M. Jul 29 — Avalanche $633M, Solana $654M. Ethereum was roughly flat (~$1.02B→$1.16B) throughout. Read daily from each chain’s contract on one methodology.
Verified Jul 29, 2026 · onchainbenchmark.com/instruments/buidlEach per-chain move corresponds to a mint or redemption in the fund’s on-chain supply, read at specific block heights; the fund’s NAV held at US$1.00 across the window, so a US$ change equals a unit change, not a valuation change. The moves are genuine supply relocations.
Verified Jul 29, 2026 · onchainbenchmark.com/instruments/buidlBUIDL’s total across all eight chains it is issued on rose from about US$2.10B to US$2.64B over the three weeks. The per-chain swings were reallocation within a growing fund, not net outflows. The mid-July ~$902M Avalanche figure reported externally (rwa.xyz / Blockcast) was an accurate snapshot of the peak, since partly unwound.
rwa.xyz — BUIDL- Did BlackRock’s BUIDL fund really double on Avalanche in July 2026?
- Its supply on Avalanche did roughly double in mid-July, from about US$403 million to a peak near US$907 million. But reading every chain the fund is issued on shows the increase largely coincided with a fall in BUIDL’s supply on Solana (down about US$269 million on the same days), and by late July about half the Avalanche jump had unwound (back to ~US$633 million) while Solana recovered. The fund’s total across all chains grew over the period, so this was supply moving between chains, not new money arriving on Avalanche alone.
- Does a rising tokenized-asset balance on a blockchain mean that chain is winning institutional adoption?
- Not necessarily. When a fund is issued natively on several chains, the issuer decides how much supply sits on each — which contract it mints on and which it redeems from — and can move hundreds of millions of dollars between chains in a day. A rising per-chain balance can reflect that routing rather than a change in real demand. The clearer test is whether the fund’s total grew, and whether a per-chain rise came alongside a fall elsewhere in the same fund.
- How much of Avalanche’s tokenized-Treasury value is BUIDL?
- As of late July 2026, BlackRock’s BUIDL is about US$633 million of roughly US$807 million in tokenized-Treasury value we measure on Avalanche — about 78%. Avalanche’s tokenized-Treasury standing is, to a first approximation, this one fund, which is part of why a routing decision by its issuer can move the chain’s figure so sharply.
- Is this money leaving the BUIDL fund?
- No. BUIDL’s total supply across all eight chains it is issued on grew from about US$2.10 billion to US$2.64 billion over the three weeks in question. The per-chain movements were reallocation within a growing fund, not net redemptions out of it.