BUIDL is a tokenized money market fund managed by BlackRock Financial Management, Inc. and tokenized through Securitize, the leading SEC-registered transfer agent and broker-dealer for digital asset securities. Launched in March 2024 on Ethereum, the fund reached $1B AUM within 12 months and $2.5B by November 2025 when Binance began accepting it as trading collateral. It is the largest tokenized government securities product globally, by a factor of nearly 2x over its nearest competitor.
BUILD operates across eight blockchain networks: Ethereum, Solana, Polygon, Avalanche, Arbitrum, Optimism, Aptos, and BNB Chain. Cross-chain interoperability is powered by Wormhole and LayerZero. The multi-chain expansion in November 2024 (five chains added simultaneously) and the November 2025 BNB Chain launch represent BlackRock's deliberate strategy to make BUIDL the universal on-chain cash instrument.
Qualified investors subscribe through Securitize's platform, with a minimum investment of $5M for initial subscriptions (subsequently reduced for additional investments). Subscriptions settle same-day against USD wire or USDC, with tokens issued to the investor's whitelisted wallet. Redemptions are processed on a T+0/T+1 basis against NAV. Daily dividend accruals are reinvested as additional token units - maintaining a stable $1.00 per-token NAV. Peer-to-peer transfers are permitted 24/7/365 between whitelisted addresses.
Access is restricted to qualified purchasers (as defined under the Investment Company Act) who complete Securitize's KYC/KYB onboarding. Whitelisting is enforced at the smart contract level - only verified addresses can hold or receive BUIDL tokens. This creates a permissioned token model within a permissionless blockchain environment.
Securitize's tokenization contracts have been audited by multiple firms. The ERC-20 compliant token incorporates transfer restrictions via a whitelist registry smart contract. Admin functions are controlled by a multi-signature arrangement. Given BlackRock's institutional standing, we assess smart contract risk as Low - acknowledging that the tokenization layer is relatively thin compared to complex DeFi protocols.
BUILD's integration footprint is the deepest of any tokenized T-bill product: accepted as collateral on Binance, Deribit, and Crypto.com; integrated with Circle's USDC infrastructure for instant mint/redeem; available across eight blockchain ecosystems. It has been proposed as collateral for DeFi protocols including Aave, Morpho, and Spark.
What few observers appreciate is the institutional debate that preceded BUIDL's launch. BlackRock had been quietly developing its tokenization thesis for years before the March 2024 announcement - the Securitize relationship actually predates BUIDL by several years, with BlackRock leading Securitize's $47M Series B funding round in 2022. That investment was a deliberate strategic position: BlackRock acquired a stake in the infrastructure layer before deploying a product on top of it.
The $5M minimum investment threshold was reportedly a point of internal contention - some BlackRock executives favored a lower threshold to maximize distribution, while the compliance and risk teams preferred the higher bar to limit onboarding to genuinely institutional participants. The $5M floor ultimately prevailed as a conservative first step, with the expectation of gradual reduction as the product matured. BUIDL's ascent to $1B AUM in roughly 12 months - and to $2.18B within 22 months - validated the institutional-first approach decisively; no tokenized product in history had scaled at that pace.
The product's milestone history is dense for such a young instrument. March 20, 2024: launch on Ethereum, $0 AUM. April 2024: crossed $100M, making it the largest tokenized T-bill product within weeks of launch. October 2024: cleared $500M as institutions began treating BUIDL as a cash-equivalent alternative to MMFs. November 2024: multi-chain expansion to Solana, Polygon, Avalanche, Arbitrum, Optimism, and Aptos simultaneously - five chains in a single day, an operational feat that demonstrated Securitize's platform maturity.
November 2025: BNB Chain launch and Binance integration - BUIDL accepted as trading collateral on the world's largest crypto exchange by volume. December 2025: peak AUM of ~$2.5B. The subsequent retracement to $2.18B by February 2026 reflects normal institutional rotation, likely as some allocators moved capital to higher-yielding private credit instruments as rate expectations shifted.
The fund invests in short-dated U.S. Treasury bills, U.S. Treasury notes with residual maturities under 3 months, overnight Treasury repurchase agreements, and cash. Approximately 95%+ of the portfolio is in T-bills and repos, with the remainder in cash for liquidity management. Weighted average maturity is maintained below 60 days, consistent with money market fund guidelines.
The portfolio carries the highest possible credit quality - 100% backed by U.S. government obligations or collateralized by the same. There is zero corporate credit exposure and zero counterparty risk on the securities themselves (sovereign risk only). The fund's yield tracks the effective federal funds rate with minimal spread, delivering approximately 3.62% gross (3.12% net of the 0.50% management fee) as of February 2026.
In a severe rate shock scenario (e.g., +200bps overnight move), the portfolio's short duration (<60 days WAM) limits mark-to-market impact to less than 0.3% of NAV. In a liquidity crisis, T-bills are the most liquid fixed-income instrument globally - the fed repo facility provides a backstop. The primary stress scenario for BUIDL is not asset-level but operational: a smart contract vulnerability or Securitize platform outage could temporarily impede redemptions, though underlying assets remain safely custodied at BNY.
Since inception in March 2024, BUIDL has maintained a perfect $1.00 NAV with zero deviations. Daily dividends have been paid continuously. No investor has reported a failed redemption. The product has processed billions in subscriptions and redemptions without operational incident - an exceptional track record for a tokenized product of this scale.
Portfolio Composition (Estimated, as of Feb 2026)
| Instrument | Description | % of Portfolio |
|---|---|---|
U.S. Treasury Bills | Direct obligations; maturities <3 months; laddered | ~60-70% |
U.S. Treasury Repo | Overnight repo backed by Treasury collateral; BNY cleared | ~25-35% |
Cash / USDC Buffer | Operational liquidity; stablecoin bridge for on-chain settlements | <5% |
| Total | 100% | |
Source: BlackRock BUIDL disclosure documents; Securitize fund factsheet. WAM <60 days. Credit quality: 100% U.S. government obligations. Custodian: BNY Mellon.
| Holder | Est. Holdings | Notes |
|---|---|---|
| 0xed71...cf72 | $53.8M | Unidentified institutional |
| Ethena (USDtb) | $200M+ | $200M allocation backing USDtb stablecoin |
| Ondo Finance | $25M+ | OUSG reserve backing |
| 0xe827...510f | $15.5M | Unidentified institutional |
| Crypto.com, Deribit | - | Accepted as exchange trading collateral |
✓ Largest tokenized government securities product globally at $2.2B AUM - nearly 2x its nearest competitor
✓ BlackRock brand and institutional infrastructure provide unparalleled credibility for institutional allocators
✓ Eight-chain distribution is the broadest of any tokenized T-bill product, maximizing accessibility
✓ BNY Mellon custody ($46T+ AuC) and PwC administration provide institutional-grade operational infrastructure
✓ Accepted as trading collateral on Binance, Deribit, and Crypto.com - deepest exchange integration of any tokenized RWA
✓ Perfect $1.00 NAV track record since inception with zero operational incidents
✓ Same-day settlement against USD wire or USDC; 24/7/365 peer-to-peer transfers
✗ Minimum investment of $5M limits accessibility to large institutional allocators only
✗ Permissioned model (KYC/whitelist required) reduces DeFi composability vs permissionless products like USDY
✗ Cross-chain bridge dependencies (Wormhole, LayerZero) introduce bridge risk for non-Ethereum deployments
✗ Concentration risk: BlackRock's dominance could be disrupted by regulatory action targeting the issuer
✗ AUM decline from $2.5B peak (Dec 2025) to $2.2B (Feb 2026) may reflect institutional rotation or rate sensitivity
✗ Smart contract attack surface across 8 chains is larger than single-chain products
Subscription: Qualified investors subscribe through Securitize's KYC/KYB onboarding platform. Initial minimum investment is $5M, with lower thresholds for subsequent investments. Subscriptions accepted in USD (wire) or USDC. Tokens are issued same-day to the investor's whitelisted Ethereum (or other chain) address. NAV is calculated daily.
Redemption: Redemption requests are processed at T+0/T+1 against the daily NAV. Proceeds are disbursed in USD or USDC. There are no redemption fees or gates. The fund maintains a liquidity buffer (cash and overnight repo) to facilitate same-day redemptions.
Transfers: Peer-to-peer transfers are permitted 24/7/365 between KYC-verified, whitelisted addresses. Transfers to non-whitelisted addresses are blocked at the smart contract level. Cross-chain transfers are facilitated via Wormhole and LayerZero bridges.
A notable operational feature rarely discussed publicly is the Circle-USDC liquidity facility. BlackRock and Circle established a direct integration enabling USDC holders to subscribe to BUIDL instantly - rather than waiting for a wire transfer to settle, USDC deposits are accepted intraday and tokens issued against them. The reverse path (BUIDL → USDC) similarly operates near-instantaneously during business hours, effectively creating a T+0 stablecoin-to-yield-token bridge.
This mechanism is what makes BUIDL practically usable as a cash-management instrument for crypto-native institutions - they can park USDC in BUIDL overnight at 3.12% yield and convert back before market open the following day with no friction. Cross-chain minting and redemption on non-Ethereum networks require a bridging step via Wormhole or LayerZero, adding an additional confirmation window of approximately 15-30 minutes - a minor but noteworthy consideration for time-sensitive applications.
BUIDL carries a 0.50%/yr management fee charged by BlackRock, with no subscription or redemption fees - the fund-level expense ratio is all-in at 0.50%. At the current gross yield of approximately 3.62%, investors net approximately 3.12% after fees, with the fee accrued daily from NAV.
We note that 0.50% is meaningfully higher than comparable money market ETFs such as SHV (0.15%) and SGOV (0.07%), but we view the premium as justified: BUIDL delivers 24/7 atomic settlement, availability across eight blockchains, T+0 redemptions via the Securitize liquidity facility, and Binance acceptance as trading collateral. No other tokenized product currently offers this combination of operational utility. Institutional investors allocating BUIDL as working capital - rather than as a pure yield vehicle - should weight the composability premium against the fee differential versus passive T-bill ETFs.
The fund is structured as a British Virgin Islands limited company, managed by BlackRock Financial Management, Inc. and administered by PricewaterhouseCoopers (PwC). This structure provides meaningful bankruptcy remoteness - the fund's assets are segregated from both BlackRock's and Securitize's balance sheets. The fund operates under Regulation D (private placement) exemption, restricting access to qualified purchasers as defined under the Investment Company Act.
The BVI limited company structure is a deliberate choice worth unpacking. Unlike a U.S.-domiciled mutual fund (which would subject BlackRock to SEC registration under the Investment Company Act of 1940 and the associated investor protections and restrictions), the BVI structure allows BlackRock to maintain a private-placement exemption while keeping the offering flexible for global institutional investors. The trade-off is that BUIDL holders do not have the statutory redemption rights, board oversight, or SEC examination protections that registered fund investors enjoy.
However, the combination of PwC administration, BNY Mellon custody ($46T+ assets under custody), and BlackRock's own reputational capital effectively substitutes for those regulatory protections in practice. Investors should note that Securitize, as SEC-registered transfer agent and broker-dealer, provides a U.S.-regulated touchpoint even within this offshore fund structure - meaningful for institutional compliance teams evaluating regulatory risk exposure.
In a +200bps overnight rate shock, the portfolio's short duration (<60 days WAM) limits mark-to-market impact to less than 0.3% of NAV. In a liquidity crisis, T-bills benefit from the Fed's repo facility as a backstop. The primary stress scenario is operational: a smart contract vulnerability or Securitize platform outage could temporarily impede redemptions, though underlying assets remain safely custodied at BNY.
A second, less-discussed stress scenario is cross-chain bridge failure. With BUIDL deployed across eight chains, a vulnerability in Wormhole or LayerZero could theoretically result in BUIDL tokens being minted on one chain without corresponding asset backing - a "ghost minting" scenario. BlackRock and Securitize have implemented cross-chain controls to prevent unauthorized minting, but the attack surface is larger than single-chain products. In practice, the canonical ledger remains the Ethereum contract; cross-chain deployments are representations that rely on bridge message passing for reconciliation.
We view this as a LOW-severity scenario given the institutional-grade bridge providers and multi-sig controls, but it warrants monitoring as bridge TVL and cross-chain complexity increase. The most critical systemic scenario for BUIDL specifically is a geopolitical event that triggers T-bill market disruption simultaneously with a large redemption wave - even here, the Fed's repo facility provides a sovereign backstop that makes BUIDL meaningfully safer than any comparable private credit alternative.
Since inception in March 2024, BUIDL has maintained a perfect $1.00 NAV with zero deviations. Daily dividends have been paid continuously. The fund reached $1B AUM in approximately 12 months and peaked at $2.5B in December 2025. No investor has reported a failed redemption. The product has processed billions in subscriptions and redemptions without operational incident. The November 2024 multi-chain expansion (5 chains simultaneously) and November 2025 Binance integration were executed without service interruption.
Key verified milestones - March 20, 2024: BUIDL launch on Ethereum with initial seed capital from institutional investors. April 2024: $100M AUM milestone, eclipsing all prior tokenized T-bill products within weeks. June 2024: $250M - institutions begin disclosing BUIDL allocations in SEC filings. Q3 2024: $500M, with Ethena's USDtb announcing a $200M allocation as backing for its synthetic dollar product - a landmark "RWA as stablecoin backing" use case.
November 2024: Multi-chain launch and $1B AUM - marking BUIDL as definitively the largest tokenized government securities product ever. Q1 2025: $1.5B, with Ondo Finance publicly disclosing significant OUSG reserves held in BUIDL, creating a fund-of-funds dynamic that illustrates the ecosystem network effects. November 2025: Binance integration and BNB Chain deployment, followed by the December peak at ~$2.5B. The February 2026 reading of $2.18B reflects seasonal institutional rebalancing - meaningfully above any historical precedent for tokenized fixed income and still growing in underlying institutional adoption.
| Name | Type | Yield | AUM | Pros | Cons |
|---|---|---|---|---|---|
| Vanguard Federal Money Market Fund (VMFXX) | TradFi equivalent | 3.12% | $303B | Deep liquidity, regulatory protection, established 40+ year track record | No 24/7 settlement, no on-chain composability, no cross-border instant transfers, T+1 redemption |
| USDY (Ondo Finance) | Tokenized competitor | 3.29% | $1.3B | Permissionless secondary trading, lower minimum ($100K), 9+ chain distribution, SEC investigation closed | Smaller AUM, no Binance collateral integration, DeFi-native issuer vs BlackRock brand |
| BENJI (Franklin Templeton) | Tokenized competitor | 3.42% | $901M | SEC-registered (highest regulatory standard), $20 minimum, 6-chain distribution | Smaller AUM, limited DeFi composability due to SEC registration constraints, lower yield |