Abu Dhabi's Mubadala has raised its holding in BlackRock's spot Bitcoin ETF (#IBIT ) to 14,721,917 shares, up from 12,702,323 shares reported in Q1 2026, as shown in a recent 13F filing. Back in January 2025, BlackRock's CEO noted at Davos that talks were ongoing with sovereign funds about including Bitcoin in their portfolios, which suggests a strong possibility for substantial value increase should institutional demand rise.