BlackRock's BUIDL Tokenized Fund Crosses $2 Billion in Assets

BUIDL Breaks the $2 Billion Barrier

BlackRock's BUIDL tokenized fund crossed $2 billion in assets under management on March 22, 2026, according to on-chain data tracked by RWA.xyz and confirmed by Securitize, the fund's transfer agent and technology partner. The milestone makes BUIDL the largest tokenized fund of any kind, more than tripling the size of its nearest competitor.

The fund, formally named the BlackRock USD Institutional Digital Liquidity Fund, launched in March 2024 with $100 million in seed capital. It reached $500 million by September 2024, crossed $1 billion in October 2025, and has now doubled again in under six months. The acceleration reflects growing institutional appetite for blockchain-based Treasury exposure.

BUIDL holds short-term U.S. Treasury bills, repurchase agreements, and cash equivalents. Each token represents one share of the fund and maintains a stable $1.00 net asset value. The fund distributes yield daily through new token issuance, passing through Treasury returns minus a 0.20% annual management fee.

How the BUIDL Fund Works

The fund's structure combines traditional asset management with blockchain settlement. BlackRock manages the portfolio of Treasury securities through its standard institutional processes. Securitize handles the tokenization layer, issuing ERC-20 tokens on Ethereum that represent ownership shares.

Investors must pass KYC/AML verification through Securitize before purchasing tokens. Once approved, they can subscribe and redeem through Securitize's platform, with settlement occurring on-chain rather than through the traditional T+1 clearing system. This enables same-day settlement and 24/7 transferability between whitelisted addresses.

The minimum investment remains $100,000, restricting participation to institutional and accredited investors. However, the fund's multichain expansion in late 2025 reduced the friction and gas costs associated with smaller institutional allocations.

The Competitive Tokenized Treasury market

BlackRock's dominance has not discouraged competition. The total tokenized Treasury market now exceeds $5 billion across all issuers, up from under $800 million in March 2024. Franklin Templeton's BENJI fund, which was actually the first major tokenized government fund, holds $620 million and differentiates itself with a much lower $20 minimum investment.

Ondo Finance, a crypto-native issuer, has carved out a niche by making its USDY token widely composable across DeFi protocols. Unlike BUIDL, which requires whitelisted addresses, Ondo's structure allows broader secondary market trading, making it popular among DeFi treasuries and DAOs seeking yield on idle capital.

Hashnote's USYC and Superstate's USTB target the same institutional audience as BUIDL but have struggled to match BlackRock's distribution reach. The BlackRock brand carries significant weight with allocators who are making their first foray into blockchain-based products.

DeFi Integration and Composability

One of the most significant developments around BUIDL has been its integration with decentralized finance protocols. In January 2026, Aave governance approved BUIDL as eligible collateral on its institutional lending pool, allowing holders to borrow stablecoins against their tokenized Treasury positions.

This creates a powerful use case: an institution can park funds in BUIDL to earn Treasury yields while simultaneously using those tokens as collateral to access liquidity without selling the underlying position. The combined yield from Treasury returns and efficient capital utilization through DeFi borrowing creates economics that do not exist in traditional finance.

Maker (now Sky) has also begun accepting BUIDL tokens as collateral for DAI minting, and Compound's institutional deployment has added BUIDL to its collateral whitelist. These integrations represent the first real bridge between the world's largest asset manager and permissionless DeFi protocols.

What This Means for Traditional Finance

The $2 billion milestone sends a clear signal that tokenization is not an experiment. BlackRock CEO Larry Fink has repeatedly called tokenization "the next generation for markets," and BUIDL's growth validates that thesis with real capital allocation.

Several trends are converging to accelerate adoption. First, the operational benefits are quantifiable. On-chain settlement eliminates the need for correspondent banks, custodial intermediaries, and multi-day clearing cycles. Securitize estimates that BUIDL's blockchain-based operations reduce back-office costs by 60-70% compared to traditional fund administration.

Second, the yield environment makes tokenized Treasuries attractive. With short-term Treasury yields still above 4%, institutional investors can earn competitive returns while gaining the flexibility of blockchain-based settlement and composability.

Third, regulatory clarity has improved. The SEC's updated guidance on tokenized securities in late 2025 provided a clearer framework for registered investment products to use blockchain rails, removing a key uncertainty that had slowed institutional adoption.

Challenges and Regulatory Considerations

Despite its growth, the tokenized fund market faces real obstacles. The fragmented multichain market means liquidity is split across Ethereum, Avalanche, Polygon, and other networks. While cross-chain bridges exist, they introduce additional smart contract risk that institutional risk teams remain cautious about.

Regulatory requirements also limit composability. Because BUIDL requires KYC-verified addresses, it cannot be freely traded on permissionless exchanges or used in fully decentralized protocols without additional compliance wrappers. This creates a tension between the open nature of blockchain networks and the regulated nature of securities products.

Custody remains a nuanced challenge as well. While the tokens themselves are held in self-custody wallets or qualified custodians, the underlying Treasury securities are held in traditional custody arrangements. This dual-layer custody model adds complexity that does not exist with purely on-chain assets.

The competition may also put pressure on fees. As more issuers enter the market and assets grow, management fees are likely to compress. BlackRock's 0.20% fee is already low by active management standards but represents meaningful revenue at $2 billion in AUM.