USTB

Superstate has expanded USTB, its tokenized fund that holds short-duration US Treasury bills, to the Base network, with the move confirmed in filings dated Wednesday, September 30, 2026. The expansion gives institutional holders of Base-native stablecoins and tokenized assets a regulated, yield-bearing cash equivalent on Coinbase’s layer-2 chain.

• Superstate confirmed the expansion of USTB, its tokenized short-duration US Treasury fund, to Base on September 30, 2026.
• The rollout was verified through primary regulatory and corporate filings dated the same day, September 30, 2026.
• Superstate published its official disclosure of the Base launch through a PR Newswire release dated September 30, 2026.

• Sep 30 date filings confirmed USTB’s expansion to Base
• 2026 year USTB expanded to the Base network
• Sep 30 date PR Newswire carried Superstate’s disclosure of the launch

Superstate’s USTB fund packages short-term US Treasury bills into an on-chain token, letting institutions hold a Treasury-backed, yield-generating instrument without leaving a blockchain settlement rail. The firm confirmed the Base deployment in a filing first reported by newsbtc.com, according to corporate and regulatory records dated Wednesday, September 30, 2026.

Superstate Verifies USTB Move Through September 30 Filing

The expansion was confirmed through primary regulatory and corporate filings rather than a marketing announcement alone, according to the records reviewed on September 30, 2026. Superstate also issued a formal disclosure of the Base rollout through a PR Newswire release carrying the same date.

That dual confirmation, filing plus public disclosure, matters for compliance teams at banks and asset managers evaluating tokenized Treasury products. It gives them a paper trail beyond a social media post or blog update.

Base Becomes the Latest Home for Tokenized Treasury Collateral

Base, the Ethereum layer-2 network operated by Coinbase, has become an increasingly active venue for tokenized real-world assets over 2026.

USTB’s arrival on Base extends that pattern from equities into government debt, giving protocols and treasuries on the network a short-duration Treasury instrument to hold alongside tokenized stocks and stablecoins. For institutional desks already running collateral on Base, the addition lets them source Treasury-bill yield without bridging assets to Ethereum mainnet or Solana.

What Happens Next for Institutional Collateral Flows on Base

Superstate’s disclosure did not specify a target size for USTB holdings on Base or name early institutional adopters. Traders and treasury managers are now watching whether collateral and liquidity flows follow the rollout in the coming weeks.

The CCS read. We read this as Base continuing to position itself as the settlement layer of choice for tokenized cash and collateral, following the network’s tokenized-equity push through Aave. A Treasury-bill fund alongside tokenized stocks gives institutions a fuller onchain balance sheet on one chain, reducing the need to bridge collateral elsewhere for yield.

Superstate has not disclosed initial subscription figures or named early institutional participants for USTB on Base, leaving the pace of adoption as the open question going forward.