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Deployments · Securitize · platform by Securitize

BlackRock USD Institutional Digital Liquidity Fund (BUIDL)Updated 28 Oct 2026

A BlackRock money market style fund whose shares are issued as tokens, held in investors' wallets and pegged at one dollar, with dividends paid as new tokens. Holdings are cash, Treasury bills and repo. Offered to qualified investors through Securitize, and extended from Ethereum to several other public chains. Since February 2026 whitelisted holders can also trade it with market makers through UniswapX, via Securitize Markets.

AnnouncedProof of conceptPilotLive (limited)Live (scaled)

Live (scaled) since Mar 2025[4] — Assets above $1.7 billion across seven chains by March 2025. · Reviewed 13d ago

Assets
Fund interest[3]
Fund shares issued as tokens worth one dollar each
Networks
Ethereum Public, permissionless[3]
Solana Public, permissionless[4]
Aptos Public, permissionless[4]
Arbitrum Public, permissionless[4]
Avalanche Public, permissionless[4]
Optimism Public, permissionless[4]
Polygon Public, permissionless[4]
BNB Chain Public, permissionless[5][10]
Tempo Public, permissioned[5]
Use cases
Primary issuance[3]Fund subscription and redemption[4]Asset servicing[3]Secondary trading[9]
Jurisdictions
United States

Participants

Likely relevant regulation

Assets

Data feeds

  • Fund NAVRedStoneRedStone NAV feed (push and pull)Ethereum, Arbitrum, Optimism, Avalanche, Polygon, Solana[2]
  • Interest ratesRedStoneRedStone interest accrual feedEthereum, Arbitrum, Optimism, Avalanche, Polygon, Solana[2]
  • Proof of reservesChronicle LabsProof of Asset[1]Holdings-level attestation of BUIDL's backing assets (valuation, composition, custody, existence), shown on a Chronicle dashboard.

Moves across networks

  • viaWormholeEthereum ↔ Aptos ↔ Arbitrum ↔ Avalanche ↔ Optimism ↔ Polygon ↔ Solana ↔ BNB Chain[6][7]Wormhole provides cross-chain transfers of BUIDL across these chains; the posts do not name individual routes. Tempo is not covered by these sources.

Metrics

  • $2.2bnAssets under management · as of 11 Oct 2026[5]
    On-chain token supply via rwa.xyz at a $1 NAV; 105 holders.
  • $917.1mTokens on Solana · as of 11 Oct 2026 · on Solana[5]
    On-chain via rwa.xyz
  • $483.53mTokens on Avalanche · as of 11 Oct 2026 · on Avalanche[5]
    On-chain via rwa.xyz
  • $435.69mTokens on Ethereum · as of 11 Oct 2026 · on Ethereum[5]
    On-chain via rwa.xyz
  • $156.86mTokens on Aptos · as of 11 Oct 2026 · on Aptos[5]
    On-chain via rwa.xyz
  • $146.75mTokens on Bnb Chain · as of 11 Oct 2026 · on BNB Chain[5]
    On-chain via rwa.xyz
  • $26.49mTokens on Optimism · as of 11 Oct 2026 · on Optimism[5]
    On-chain via rwa.xyz
  • $17.12mTokens on Tempo · as of 11 Oct 2026 · on Tempo[5]
    On-chain via rwa.xyz
  • $11.94mTokens on Polygon · as of 11 Oct 2026 · on Polygon[5]
    On-chain via rwa.xyz
  • $8.58mTokens on Arbitrum · as of 11 Oct 2026 · on Arbitrum[5]
    On-chain via rwa.xyz
  • $2.17bnAssets under management · as of 18 Oct 2026[8]
    On-chain token supply via rwa.xyz at a $1 NAV; 106 holders.
  • $871.65mTokens on Solana · as of 18 Oct 2026 · on Solana[8]
  • $481.57mTokens on Avalanche · as of 18 Oct 2026 · on Avalanche[8]
  • $451.99mTokens on Ethereum · as of 18 Oct 2026 · on Ethereum[8]
    Two Ethereum contracts ($256.2m and $195.8m)
  • $156.97mTokens on Aptos · as of 18 Oct 2026 · on Aptos[8]
  • $146.86mTokens on BNB Chain · as of 18 Oct 2026 · on BNB Chain[8]
  • $26.51mTokens on Optimism · as of 18 Oct 2026 · on Optimism[8]
  • $17.13mTokens on Tempo · as of 18 Oct 2026 · on Tempo[8]
  • $11.95mTokens on Polygon · as of 18 Oct 2026 · on Polygon[8]
  • $8.59mTokens on Arbitrum · as of 18 Oct 2026 · on Arbitrum[8]
  • over $1.7bnAssets under management · as of Mar 2025[4]
    The Block citing DeFiLlama data.
  • $5.14bnFund interests sold since launch · as of 23 Jul 2026[11]
    Form D 'total amount sold' since the first sale on 2024-03-04: cumulative subscriptions into the fund, whose interests are issued as tokens; 28 investors had invested. Gross of redemptions, so it is not a balance.
  • 28 investorsInvestors in the offering · as of 23 Jul 2026[11]
    Form D count of investors who have already invested.

Timeline

  1. Happened 11 Feb 2026 · Scope expansion · recorded 18 Oct 2026
    Uniswap Labs and Securitize make BUIDL tradable 24/7 through UniswapX quotes from whitelisted market makers, for pre-qualified investors; BlackRock also invests in the Uniswap ecosystem.[9]
  2. Happened 14 Nov 2025 · Scope expansion · recorded 18 Oct 2026
    A new BUIDL share class launches on BNB Chain, and Binance starts accepting BUIDL as off-exchange collateral.[10]
  3. Happened 25 Mar 2025 · Scope expansion · recorded 11 Oct 2026
    Solana becomes the seventh supported chain as assets pass $1.7 billion.[4]
  4. Happened 20 Mar 2024 · Launch · recorded 11 Oct 2026
    BlackRock launches its first tokenised fund on Ethereum, distributed through Securitize Markets with BNY as custodian.[3]

Sources

  1. [1]BlackRock's tokenized BUIDL fund taps Chronicle for new 'verification layer' — The Block, 26 Mar 2026. Accessed 16 Oct 2026. Quotes Securitize's CEO and BlackRock's head of digital assets on Chronicle Proof of Asset attesting BUIDL's holdings (valuation, composition, custody, existence); networks not named..C
  2. [2]Tokenize the World: RedStone's Role in the Securitize Ecosystem — RedStone, 6 Jul 2026. Accessed 16 Oct 2026. Provider self-report: RedStone is Securitize's primary oracle partner and lists the feeds and networks per product..B
  3. [3]BlackRock Launches Its First Tokenized Fund, BUIDL, on the Ethereum Network — BlackRock (via Business Wire), 20 Mar 2024. Accessed 11 Oct 2026.B
  4. [4]BlackRock expands BUIDL to Solana as AUM surges past $1.7 billion — The Block, 25 Mar 2025. Accessed 11 Oct 2026.C
  5. [5]BUIDL asset page (on-chain data) — rwa.xyz. Accessed 11 Oct 2026.A
  6. [6]BlackRock and Securitize expand BUIDL to BNB chain with interoperability powered by Wormhole — Wormhole, 14 Nov 2025. Accessed 13 Oct 2026. Service provider's own announcement; names Wormhole as Securitize's official interoperability provider..B
  7. [7]BlackRock and Securitize debut new BUIDL share class on Solana network with Wormhole interoperability — Wormhole, 25 Mar 2025. Accessed 13 Oct 2026.B
  8. [8]BUIDL asset page (on-chain data) — rwa.xyz. Accessed 18 Oct 2026. Figures read from the page's embedded JSON (__NEXT_DATA__) on 18 Oct 2026..A
  9. [9]BlackRock's BUIDL fund integrates with Uniswap to expand tokenised asset liquidity — Uniswap Labs and Securitize (joint release, via The Asian Banker), 11 Feb 2026. Accessed 18 Oct 2026. Re-published joint press release; the Business Wire original blocks automated fetching..B
  10. [10]BlackRock's BUIDL, Tokenized by Securitize, Now Accepted as Collateral for Trading on Binance and Launches on BNB Chain — Securitize (via PR Newswire), 14 Nov 2025. Accessed 18 Oct 2026.B
  11. [11]BlackRock USD Institutional Digital Liquidity Fund Ltd.: Form D notice of exempt offering (amendment) signed 2026-07-23 — BlackRock USD Institutional Digital Liquidity Fund Ltd. (SEC Form D/A), 27 Jul 2026. Accessed 26 Oct 2026.A
  12. [12]BUIDL asset page (service provider listing) — RWA.xyz. Accessed 28 Oct 2026.C

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