Millennium Management Reduces Spot Bitcoin and Ethereum ETF Holdings by Over a Third

Global hedge fund Millennium Management has significantly reduced its exposure to spot Bitcoin and Ethereum exchange-traded funds (ETFs), according to its latest 13F filing with the U.S. Securities and Exchange Commission. The filing, which covers the first quarter of 2025, reveals a substantial pullback from two of the largest digital asset ETFs on the market.

Details of the Reduction

The filing shows that Millennium Management cut its holdings in BlackRock’s spot Bitcoin ETF (IBIT) by 43.8%, dropping from 34.334 million shares at the end of December 2024 to 19.287 million shares by the end of March 2025. Simultaneously, the firm reduced its position in BlackRock’s spot Ethereum ETF (ETHA) by 34.3%, from 25.1 million shares to 16.5 million shares over the same period.

These moves represent a notable shift in strategy for one of the world’s largest multi-strategy hedge funds, which had been among the most prominent institutional investors in the new spot crypto ETF category. The 13F filing, a quarterly report of equity holdings required by the SEC, offers a delayed but transparent look into the trading activity of large institutional managers.

Context and Market Implications

The reductions come during a period of mixed performance for digital assets. While Bitcoin reached new all-time highs in early 2025, the market experienced increased volatility and regulatory uncertainty in subsequent months. Millennium Management’s decision to pare back its positions may reflect a broader risk-management approach, particularly given the fund’s reputation for deploying complex, market-neutral strategies.

It is important to note that 13F filings are backward-looking and do not capture current positions or the rationale behind trading decisions. The filing does not indicate whether the proceeds from the sales were reallocated to other crypto assets, traditional securities, or held as cash.

What This Means for Institutional Adoption

While a single fund’s position reduction does not signal a broader institutional retreat, it does highlight the cautious approach many traditional financial firms continue to take toward digital assets. The spot Bitcoin and Ethereum ETFs, approved by the SEC in early 2024, have attracted significant institutional inflows, but they remain subject to market cycles and regulatory developments.

Millennium Management’s move may also be interpreted as a tactical rebalancing rather than a fundamental change in conviction. The firm still holds tens of millions of shares in both ETFs, indicating a continued, albeit reduced, allocation to the asset class.

Conclusion

Millennium Management’s significant reduction in its spot Bitcoin and Ethereum ETF holdings is a notable data point in the evolving relationship between traditional finance and digital assets. The filing underscores that even the most sophisticated institutional investors are actively managing their crypto exposure, adjusting positions in response to market conditions and risk parameters. For observers of the crypto market, the move serves as a reminder that institutional flows can shift rapidly, and that 13F filings provide valuable, if delayed, insights into the strategies of major market participants.

FAQs

Q1: What is a 13F filing?
A 13F filing is a quarterly report filed with the U.S. Securities and Exchange Commission by institutional investment managers with at least $100 million in assets under management. It discloses their equity holdings and provides public insight into the trading activity of large investors.

Q2: Does the filing explain why Millennium Management reduced its holdings?
No. 13F filings only report the number of shares held at the end of the quarter. They do not include the investment rationale, trading strategy, or subsequent changes in position.

Q3: Should investors interpret this as a negative signal for Bitcoin and Ethereum?
Not necessarily. A single fund’s position change reflects its own risk management and strategy. Other institutional investors may have increased or maintained their holdings during the same period. The overall market impact depends on a wide range of factors beyond any one filing.