BlackRock’s tokenized Treasury fund BUIDL is now distributed across nine public blockchains, with Aptos holding approximately $157 million of the fund’s on-chain supply. The latest distribution shows BUIDL evolving into a genuinely multichain product, although most assets remain concentrated on a handful of networks.
According to the BUIDL asset dashboard on RWA.xyz, the BlackRock USD Institutional Digital Liquidity Fund held approximately $2.17 billion as of October 20. Solana accounted for about $872.1 million, followed by Avalanche with $481.7 million and Ethereum with roughly $452.1 million across two share classes. Aptos ranked fourth with $157.0 million, representing about 7.2% of BUIDL’s total tokenized value.
The complete network footprint consists of Solana, Avalanche, Ethereum, Aptos, BNB Chain, Optimism, Tempo, Polygon and Arbitrum. Tempo became the ninth deployment in July, extending a rollout that began on Ethereum in March 2024. BUIDL’s distribution is therefore no longer Ethereum-centered: roughly four-fifths of its current supply sits on other networks.
Aptos Holds a Meaningful but Concentrated BUIDL Share
Aptos currently sits only slightly ahead of BNB Chain, which holds approximately $146.9 million of BUIDL. The remaining smaller deployments include Optimism at $26.5 million, Tempo at $17.1 million, Polygon at $12.0 million and Arbitrum at $8.6 million.
The $157 million Aptos balance establishes where fund shares are issued, not how actively those shares are being used in DeFi or settlement. A large on-chain balance can remain predominantly held rather than repeatedly deployed as collateral, transferred between investors or integrated into financial applications.
That distinction has become important across tokenized Treasury markets. Ondo’s multichain footprint similarly shows roughly $4 billion of tokenized assets distributed across 10 networks, while Sei holds around $259 million of USDY despite only a much smaller portion being classified as active DeFi TVL. Chain-level supply and productive on-chain usage are separate adoption metrics.
BUIDL itself remains highly concentrated among eligible institutional investors. RWA.xyz currently records only 103 holders across the fund, alongside approximately $299.9 million in monthly transfer volume. The product is restricted to U.S. qualified purchasers and currently lists a $5 million minimum investment.
Wormhole Connects a Native Multichain Structure
Securitize, which tokenizes and administers BUIDL, selected Wormhole as its primary interoperability provider in January 2025. The infrastructure allows supported tokenized funds to move between blockchain environments while preserving Securitize’s transfer-agent and compliance controls.
That interoperability should not be confused with generic bridged BUIDL representations. RWA.xyz classifies the nine deployments as native tokenized share classes, while cross-chain movement operates through issuer-approved infrastructure rather than allowing unrestricted copies of the security to circulate across arbitrary bridges.
The structure reflects a broader shift in tokenized finance toward multichain distribution. Franklin Templeton has similarly expanded tokenized money-market infrastructure onto XRP Ledger, while Securitize continues adding new institutional tokenization networks such as ADI Chain. The emerging model is not simply to issue a fund onchain once, but to make regulated financial assets available wherever institutional settlement and liquidity infrastructure develop.
For BUIDL, however, nine-chain availability remains different from evenly distributed adoption. Solana, Avalanche and Ethereum still account for more than 80% of the fund’s current tokenized supply, while Aptos has established a meaningful fourth-place position at roughly $157 million. The next indication of deeper multichain maturity will come from transfer activity, collateral usage and recurring financial workflows on those secondary networks rather than chain count alone.