In the past week, over 600 companies disclosed substantial investments in spot Bitcoin exchange-traded funds (ETFs) in their 13F filings with the US Securities and Exchange Commission (SEC). According to the filings, professional investment firms collectively own Bitcoin ETFs valued at $3.5 billion.

Major players include Morgan Stanley, JPMorgan, Wells Fargo, UBS, BNP Paribas, Royal Bank of Canada, as well as hedge funds such as Millennium Management and Schonfeld Strategic Advisors. Millennium emerged as the largest investor, allocating $1.9 billion to BTC ETFs. This includes significant investments in various ETFs, such as BlackRock’s iShares Bitcoin Trust (IBIT), Fidelity’s Wise Origin Bitcoin Fund (FBTC), Grayscale Bitcoin Trust (GBTC), ARK 21Shares Bitcoin ETF (ARKB), and Bitwise Bitcoin ETF (BITB).

Schonfeld Strategic Advisors, managing $13 billion in assets, followed with a $248 million investment in BlackRock’s ETF and $231.8 million in Fidelity’s fund. Boothbay Fund Management, Pine Ridge Advisers, and others also disclosed substantial investments in spot Bitcoin ETFs.

Morgan Stanley reported a $269.9 million investment in GBTC, making it one of the largest GBTC holders, while Aristeia Capital disclosed a $163.4 million investment in IBIT. Other firms like Graham Capital Management, CRCM, and Fortress Investment Group also revealed significant investments in various Bitcoin ETFs.

Spot Bitcoin ETFs, introduced in January, initially experienced high demand but have seen decreased inflows in recent weeks. Nonetheless, the disclosed investments indicate ongoing interest from numerous financial institutions in the Bitcoin ETF market.