Abu Dhabi’s Mubadala Investment Company increased its iShares Bitcoin Trust (IBIT) stake by 16% during the first quarter of 2026. A May 15 13F filing revealed the sovereign wealth fund owned over 14.7 million shares as of March 31, 2026. These holdings were valued at more than $565 million.
Another filing showed Avenir Group holds $702 million in IBIT, representing 89% of its total portfolio. This institutional accumulation occurred despite IBIT recording a $284.7 million single-day outflow on May 14, reported May 15.
The data suggests a divergence in market sentiment. While some investors are rotating assets or taking profits, sovereign wealth funds are using the opportunity to build substantial positions in Bitcoin ETFs.