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Mubadala Raises BlackRock Bitcoin ETF Stake to Nearly $660 Million in Q1

Quarterly 13F filings show Mubadala expanding its BlackRock Bitcoin ETF position, Harvard cutting IBIT and exiting an Ethereum ETF, and Dartmouth disclosing about $14 million across Bitcoin, Ethereum and Solana funds.

BTC
ETH
SOL

Fact Check
All three components of the claim are directly supported by primary SEC 13F filings and corroborated by credible financial news outlets. The Mubadala SEC 13F (CIK 1704268) confirms 14.7M IBIT shares; The Block notes these are worth 'nearly $660 million at current prices,' matching the claim's wording exactly. The Harvard SEC 13F (CIK 1082621) confirms a reduced IBIT position (~3M shares, ~$117M) with no Ethereum ETF, consistent with a ~43% cut and full ETH ETF exit. The crypto.news article and The Block both confirm Dartmouth's ~$14M exposure across Bitcoin (FBTC), Ethereum (CETH/SETH), and a new Solana (SOL) ETF. The minor residual uncertainty (5%) stems from the Dartmouth SEC filing URL returning a 404 during this run, meaning that specific filing could not be directly verified, though two independent news sources citing it are consistent and credible.
Summary

Quarterly 13F filings show diverging institutional moves across crypto exchange-traded funds in 2026. Mubadala, the Abu Dhabi sovereign wealth fund, increased its holdings in BlackRock’s iShares Bitcoin Trust (IBIT) to 14,721,917 shares worth nearly $660 million in the first quarter; another report described the stake as above $565 million. Harvard reduced its IBIT stake by 43% to 3,044,612 shares and fully exited BlackRock’s spot Ethereum ETF. Dartmouth’s May 15 SEC filing disclosed roughly $14 million in exposure across Bitcoin, Ethereum and Solana ETFs, including 201,531 shares of IBIT valued at $7.7 million and a position in the Bitwise Solana Staking ETF. Together, the filings show institutions using regulated fund products to add, reduce, or diversify crypto exposure without directly holding tokens.

Terms & Concepts
  • 13F filing: A quarterly disclosure filed with the U.S. Securities and Exchange Commission that shows certain holdings of large institutional investment managers.
  • Bitcoin ETF: An exchange-traded fund that provides exposure to Bitcoin without requiring investors to directly hold the asset.
  • Sovereign wealth fund: A state-owned investment fund that manages national capital and often allocates across public markets, private assets, and strategic sectors.