Who really controls Wall Street’s cryptocurrencies?

Wall Street’s cryptocurrency footprint has never been larger. BlackRock alone reported in its 2026 Chairman’s Letter that it has nearly $150 billion in assets under management linked to digital assets. Listed companies hold more than 1.1 million shares $BTC It’s on their balance sheet. Institutions disclosed over 513,000 cases $BTC Through the ETF wrapper.

But aggregated numbers obscure the most important questions. Who actually owns what, through what infrastructure, and why?

This article maps Wall Street’s cryptocurrency ownership into five layers.

It starts with an SEC 13F filing, moves through a company’s balance sheet, traces funds into tokenized fund rails, traces the custodial chokepoints where keys are concentrated, and ends where the filing goes dark. Contains on-chain OTC flows that reveal to holders that no quarterly reports have been captured.

SEC 13F filing reveals secrets about Wall Street crypto ETF Holdings

Despite 23% Price decline in Q4 2025 (worldwide) Bitcoin ETF flows remain positive at $3.7 Billion. Annual professional ETF ownership increased 32%, compared to an 18% increase for the broader ETF investor base.

The institution still has more than 513,000 people $BTC Through ETFs, the number of filers decreased from 2,173 to 1,867.

Not all of these are conviction capital. Basis trading, a strategy that combines long positions in spot ETFs and short positions in CME futures, has been the primary institutional strategy since the ETF’s approval.

Hedge fund exposure fell by nearly 10% in the fourth quarter as deleveraging reduced basis spreads.

Q4 defined cohort rotation rather than surrender. Millennium addition 8,100 $BTC. Mubadala in Abu Dhabi adds 2,300 $BTC. Morgan Stanley adds 1,900 $BTC. Dartmouth became the fourth Ivy League institution to donate.

Meanwhile, Brevan Howard cut 17,700. $BTCHarvard University cut around 20% and Royal Bank of Canada exited completely, all of which are mentioned in CoinShares’ Q4 2025 report.

Pension funds and endowments’ total crypto holdings reached $1.48 billion in the third quarter of 2025, before declining to $965 million in the fourth quarter.

However, ETFs only reveal who is buying the wrapper. For those who own the assets themselves, the balance sheet tells a different story.

Corporate Treasury Shows Who Holds Bitcoin Directly on Balance Sheet

Beyond ETFs, a growing number of publicly traded companies are holding Bitcoin directly as a financial reserve asset. As of March 31, 2026, publicly traded companies reported a total of 1,134,324 companies. $BTC It’s on their balance sheet.

My concentration is extremely high. Strategy Inc (formerly MicroStrategy) holds 762,000 shares. $BTC As of April 2, 2026. Other major players in this space include Twenty One Capital, MARA Holdings, and Japan’s Metaplanet.

New entrants are changing the game. Trump Media (DJT) Number of holdings: 11,542 $BTC Before pledging 2,000 $BTC Reduced the number of shares held on the balance sheet to 9,542 as collateral under a hedge agreement with rehypothecation rights $BTC. MARA Sales 15,133 $BTC By March 2026, the company will be in the red due to debt repayments.

However, the corporate treasury only considers direct spot ownership. Wall Street’s biggest firms are building their exposure to crypto assets through an entirely different mechanism that doesn’t require them to hold a single Bitcoin.

Tokenized Funds and RWA Holdings Show Where On-Chain Meets TradFi

Some of Wall Street’s biggest firms are now building their crypto exposure without owning any tokens. Instead, it puts traditional assets on-chain through tokenization.

BlackRock’s BUIDL fund, which tokenizes U.S. Treasury money market instruments, has total assets of $2.85 billion ($2.17 billion at press time).

In February 2026, BlackRock began trading BUIDL on the Uniswap decentralized exchange and purchased the UNI Governance Token. This marked our first direct engagement with DeFi trading infrastructure.

The company’s 2026 Chairman’s Letter reported $65 billion in stablecoin reserves, $80 billion in digital assets ETP, and nearly $150 billion in total assets under management linked to digital assets.

The broader market is expanding rapidly. According to RWA.xyz data as of April 2026, on-chain US Treasury debt is $12.67 billion, which is approximately 46% of the total tokenized real-world assets of $27.59 billion.

The total RWA figure has increased by 31.61% in the past 30 days alone, with 708,377 asset holders across the ecosystem.

This is Wall Street holding crypto infrastructure, not crypto assets. However, everything depends on one thing. Who has the key?

Custody map reveals single points of failure

Knowing who owns Wall Street’s cryptocurrencies is only half the battle. The other half is who holds the key.

Coinbase stores more than 80% of U.S. Bitcoin and Ethereum ETF assets, a figure acknowledged by CEO Brian Armstrong. Coinbase was the custodian of 8 of the 11 Spot Bitcoin ETF listings at launch. Only Fidelity self-custries its funds. Van Eck chose Gemini.

This concentration creates a single cluster dependency. A cyber incident, service interruption, or governance failure at one custodian can affect multiple funds simultaneously, with ripple effects on originations, redemptions, and trading liquidity.

On the tokenization side, Bank of New York Mellon serves as BUIDL’s cash and securities custodian, with Anchorage Digital, BitGo, Copper, and Fireblocks supporting BUIDL subscribers.

As of March 2026, discussions have emerged regarding multi-party computing management and multi-administrator obligations to spread risk. Structural changes have not yet materialized.

The storage map reveals the contradiction at the heart of Wall Street’s crypto exposure. Decentralized asset classes are coming together through an increasingly centralized infrastructure. And that infrastructure still leaves key holders invisible, especially those with no filing obligations at all.

What cannot be shown with shadow holders and filing

13F filings are only applicable to U.S. institutional investors with more than $100 million in eligible assets. Family offices, offshore corporations and sovereign vehicles operated through intermediaries are not subject to disclosure obligations.

This creates a structural blind spot in Wall Street’s crypto ownership map.

On-chain data reveals things that applications don’t.

Cumberland DRW, one of Wall Street’s leading OTC desks, has processed a total of $123.58 billion in deposits and $97.71 billion in withdrawals across major exchanges since 2018.

Filtering Cumberland’s outflow reveals where institutional capital is actually going. The highest outflows in history include $17 billion to Binance, $14.53 billion to Coinbase Prime, which appears to be an ETF formation, and $10.12 billion to Block Inc.

Scroll further down the counterparty list to see additional ETFs and institutional plumbing. Fidelity’s FBTC ETF inflows amounted to $7.28 billion across 171 trades.

In addition to these labeled flows, there are billions more flows destined for unlabeled wallets. single max no label $BTC recipient, wallet bc1qcyau...received $8.75 billion in 386 deals.

Currently holding 593 items $BTC It uses Copper’s institutional prime brokerage for custody.

Its pattern of large-scale OTC sourcing through Wall Street trading firms, combined with institutional-grade prime brokerage custody, is exactly the profile of a family office or sovereign vehicle operating through the same infrastructure as the ETF issuer, but with no filing obligations.

The filing provides part of the answer. The chain shows the rest.

The difference between the two masks sustained demand from shadow holders who bought through drawdowns and still hold through institutional custody, suggesting deeper structural support than any ETF tracker captures.

The same gap also hides untracked concentration that can break it.