Key Highlights

  • Mubadala increased its BlackRock IBIT stake by 16% to 14,721,917 shares valued at $566 million, adding approximately two million shares during Q1 2026.

  • The Q1 filing extends Mubadala's unbroken Bitcoin ETF accumulation streak that began in Q4 2024, with no quarter showing a reduction in holdings.

  • Harvard University liquidated its entire Ethereum ETF position during the same quarter, highlighting a sharp divergence in institutional conviction between sovereign wealth funds and academic endowments.

Abu Dhabi's Mubadala Investment Company disclosed a 16% increase in its position in BlackRock's iShares Bitcoin Trust in its Q1 2026 SEC 13F filing, bringing total holdings to 14,721,917 shares valued at $566 million as of March 31, 2026. The fund added approximately 2,019,594 shares during the quarter, up from 12,702,323 shares at the end of Q4 2025. Mubadala manages a global portfolio exceeding $330 billion in assets, making its Bitcoin ETF position a meaningful institutional signal even relative to that scale.

The Q1 2026 filing extends an unbroken accumulation streak that began when Mubadala first disclosed an IBIT position in Q4 2024. No quarter since that initial disclosure has shown a reduction in holdings. Together with Al Warda Investments, another Abu Dhabi-linked entity, combined UAE sovereign exposure to IBIT surpassed $1 billion at year-end 2025 and has continued to grow into 2026.

The same quarter's 13F filings showed a contrasting move from Harvard University, which liquidated its entire position in a spot Ethereum ETF. The divergence illustrates a growing split in how different categories of institutional investor are approaching digital assets: sovereign wealth funds in the Gulf have consistently added Bitcoin exposure across multiple quarters, while some U.S. academic endowments have been scaling back altcoin product exposure.

The broader Q1 2026 13F picture also showed Bank of America increasing its Bitcoin ETF stake while trimming Solana-linked holdings, adding to a pattern in which institutions are concentrating digital asset exposure in Bitcoin specifically even as diversified crypto ETF alternatives are available. For Mubadala, the steady quarterly buildup now positions it as one of the largest known sovereign wealth fund holders of a Bitcoin financial product anywhere in the world.