Harvard Cuts Bitcoin ETF Stake 43%; Mubadala Adds More

Harvard University’s endowment reduced its stake in BlackRock’s iShares Bitcoin Trust (IBIT) by about 43% to 3,044,612 shares, worth roughly $117 million as of March 31, 2026, and sold its entire position in BlackRock’s spot Ethereum ETF (ETHA). The changes appear in Q1 2026 13F filings submitted to the Securities and Exchange Commission.

Harvard first disclosed IBIT exposure in mid-2025 after buying about 1.9 million shares for roughly $117 million and increased the holding to an estimated $443 million by Q3 2025. The endowment trimmed IBIT about 21% in Q4 2025 and made a larger reduction in Q1 2026. The ETHA stake had been added one quarter earlier.

After the reduction, IBIT no longer ranks as Harvard’s largest disclosed public-equity holding; filings list Taiwan Semiconductor Manufacturing, Alphabet, Microsoft and the SPDR Gold Trust ahead of the Bitcoin ETF position.

Abu Dhabi sovereign investor Mubadala raised its IBIT holding to 14,721,917 shares, about $566 million, as of March 31, up from 12,702,323 shares at the end of 2025. Mubadala has increased IBIT each quarter since Q4 2024.

Other institutional activity in the Q1 filings varied. Trading firm Jane Street cut its IBIT exposure by roughly 71% and reduced its position in Fidelity’s FBTC by about 60% while increasing positions in Ethereum-focused ETFs. Emory University fully exited a small IBIT holding and moved Bitcoin exposure into the Grayscale Bitcoin Mini Trust. JPMorgan increased its IBIT stake by about 174% during the quarter, and Wells Fargo expanded its Ethereum ETF holdings.

Harvard Management Company did not provide comment and 13F filings do not include explanations for the changes. The next quarterly disclosures, due in August, will show whether institutions alter these positions further.