Arkham Intelligence has publicly identified and labeled the custody wallets associated with Morgan Stanley’s spot bitcoin ETF, MSBT, opening the door for investors and market observers to monitor the fund’s bitcoin holdings on-chain in near real time. The development marks a notable step forward in transparency for crypto investment products issued by major Wall Street institutions.
Before wallet attribution of this kind, the public typically had to rely on regulatory filings, issuer disclosures, and delayed reporting to understand how much bitcoin a fund had accumulated. By mapping addresses linked to MSBT’s custodians, Arkham now gives both retail and institutional users a more direct window into how the fund is moving and storing BTC.
Three Wallets Identified Behind MSBT
According to Arkham, its internal research team identified three on-chain wallets tied to the custodial structure supporting MSBT. The addresses were linked to custody providers Coinbase and BNY Mellon and then published on Arkham’s platform with verified entity labels.
As of around April 18, 2026, the three labeled wallets held a combined 1,348 BTC. Based on bitcoin trading in the $75,700 to $76,000 range at the time, those holdings were worth roughly $102.08 million.
Arkham had earlier said on X that MSBT had purchased $83.6 million worth of bitcoin since launch and held $64.4 million in its on-chain addresses at that point. The wallet balances have increased since then, suggesting continued accumulation in the days following the fund’s debut.
A New On-Chain Window Into a Wall Street Bitcoin Product
MSBT launched on April 8, 2026 on NYSE Arca, making Morgan Stanley the first major U.S. bank to issue a spot bitcoin ETF. That alone gave the product outsized visibility across traditional finance, especially given the bank’s approximately $9.3 trillion in client assets.
The significance of Arkham’s labeling goes beyond simply attaching names to addresses. It effectively creates an on-chain dashboard for a major TradFi bitcoin vehicle, allowing the public to observe accumulation patterns that would previously have been visible only through slower, periodic disclosures. For a market increasingly focused on transparency, this kind of real-time visibility may influence how investors interpret ETF demand and momentum.
Inflows Seen, No Major Outflows Reported
Arkham’s data showed several recent incoming transfers into the identified wallets. One transfer of 177.757 BTC, valued at about $13.75 million, arrived roughly 23 hours before publication. Another deposit of 209.296 BTC, worth around $15.47 million, was recorded three days earlier.
Additional deposits during the fund’s first two weeks reportedly ranged from 80 BTC to 415 BTC. Arkham did not report any significant outflows from the identified wallets during that period. Taken together, the transfer history points to steady fund seeding and accumulation rather than active redemption pressure.
That said, on-chain fund tracking is not perfectly instantaneous. Spot bitcoin ETFs operate on a T+1 settlement cycle, meaning blockchain transfers can appear roughly a day after public creation or redemption activity is announced. Arkham’s live dashboard therefore reflects flows once they have settled and been recorded on-chain, offering what is best described as near real-time visibility rather than a fully synchronous view.
Fee Competition Adds to MSBT’s Profile
MSBT entered the market with an expense ratio of 0.14%, the lowest among major U.S. spot bitcoin ETFs at the time of the report. For comparison, BlackRock’s iShares Bitcoin Trust (IBIT) charges 0.25%. In an increasingly competitive ETF landscape, fee structure remains one of the clearest ways issuers differentiate their offerings, especially when underlying exposure is largely similar across products.
The fund also posted a strong trading debut. On its first day, MSBT recorded about $34 million in trading volume. Bloomberg ETF analyst Eric Balchunas said that performance placed it among the top 1% of ETF launches over the prior year. After roughly five trading days, the fund’s net assets had risen to approximately $87 million.
These early metrics, combined with Morgan Stanley’s institutional brand and low fee, have helped make MSBT one of the more closely watched entries in the U.S. spot bitcoin ETF market.
Visible Holdings May Still Be Incomplete
Even with public labeling, the visible on-chain total may not fully capture all of MSBT’s bitcoin. Arkham grouped the three labeled wallets into a single entity page that displays aggregate balances, inflow and outflow charts, and complete transaction history. The addresses carry partial public prefixes including bc1qa…, bc1qe…, and bc1qn….
However, Morgan Stanley’s own website indicated that the ETF held 1,820.60 BTC as of April 17, 2026. That figure is higher than the 1,348 BTC visible in the wallets identified by Arkham, suggesting that not every associated address has necessarily been found or labeled yet.
This gap is important for anyone using on-chain dashboards to estimate ETF balances. Wallet labeling can provide a powerful transparency tool, but it remains dependent on the completeness and accuracy of attribution. As additional addresses are identified, the visible total may move closer to the issuer-reported figure.
Arkham’s Expanding Role in Crypto Transparency
Arkham said it published a detailed research report on April 17, 2026, explaining the methodology behind the identification of the MSBT wallets. The company’s analytics platform now spans more than 450,000 entity pages and billions of address labels across exchanges, governments, asset managers, DeFi protocols, and individual wallets.
The platform already tracks a wide range of notable entities, including Coinbase custody wallets, Grayscale holdings, and addresses linked to BlackRock’s IBIT. Arkham also tracks wallets associated with the U.S. government, whose entity page shows more than 328,000 BTC in seized assets, though such totals can change as new addresses are labeled and market prices fluctuate.
By adding Morgan Stanley’s MSBT to this growing dataset, Arkham is extending blockchain-based transparency deeper into the traditional financial system. For observers of the ETF market, that means a clearer view of how major institutions are interacting with bitcoin not only through official documents but also through visible settlement activity on-chain.
Why the MSBT Labeling Matters
The broader importance of the development lies in the convergence of crypto-native transparency with institutional finance. A spot bitcoin ETF issued by a major U.S. bank is already a significant milestone. Making its custody wallets publicly trackable brings a second shift: investors no longer have to wait entirely on quarterly or periodic reporting cycles to understand whether the fund is growing.
Instead, both retail traders and professional allocators can follow inflows and wallet balances from a shared dashboard, subject to settlement timing and the limits of address attribution. That does not replace formal disclosures, but it does create a parallel transparency layer that is difficult to ignore in a market where on-chain data increasingly shapes narratives around adoption and capital flows.
For Morgan Stanley, the public tagging of MSBT wallets may increase scrutiny, but it also reinforces the openness that blockchain-based financial products can offer. For the broader ETF sector, it may set a precedent: as more custody structures become identifiable on-chain, market participants could begin to expect this level of visibility from institutional bitcoin products as a matter of course.