Public Bitcoin Wallets Expose Morgan Stanley Spot ETF Holdings via Arkham

Arkham Intelligence says it has identified the on-chain custodian wallets behind Morgan Stanley’s new spot Bitcoin ETF, the Morgan Stanley Bitcoin Trust (MSBT). Because the wallets are now trackable, traders can monitor MSBT-linked BTC inflows and outflows as transactions settle on-chain. MSBT began trading on NYSE Arca on April 8. Arkham reports it confirmed the custodian wallets used by the fund with high accuracy before making them visible to users. However, traditional finance operates on a T+1 settlement cycle, so wallet data can reflect “yesterday’s” allocations rather than same-day decisions. Since launch, MSBT has bought about $102.79 million worth of BTC. Arkham estimates on-chain holdings at roughly 1,348 BTC. Bloomberg ETF analyst Eric Balchunas also flagged MSBT as a top-tier launch, placing it in the top 1% of ETF debuts over the past year. Fee dynamics matter for flows: MSBT charges 0.14% in annual fees, the lowest among US spot Bitcoin ETFs cited in the article. For comparison, BlackRock’s IBIT charges 0.25% and leads the market with roughly $57 billion in assets under management. Coinbase and BNY Mellon are named as digital asset custodians for the fund. For traders, this “public Bitcoin wallet” visibility can sharpen near-term positioning around ETF creation/redemption cycles and improve monitoring of whether demand is accelerating—though the T+1 lag limits real-time precision.