BlackRock's IBIT fastest ETF to hit $100B in assets

BlackRock's iShares Bitcoin Trust, IBIT, has surged to the brink of a historic milestone, amassing roughly $98 billion to $100 billion in assets and holding over 800,000 bitcoin as of early October 2025. The fund's rapid growth since its January 2024 launch has made it the most profitable exchange traded fund in BlackRock's lineup, generating about $244 million in annual fee revenue at its 0.25 percent management charge, industry analysts say.

The run-up has been driven by sustained and concentrated inflows. In the first week of October, U.S. spot bitcoin ETFs collectively took in several billion dollars, with IBIT accounting for the largest share on multiple high-volume days, including a single-day intake near $970 million. Trading volume in spot bitcoin ETFs has spiked alongside the flows, with daily volumes surpassing $7.5 billion on Oct. 7. That combination of fresh capital and rising bitcoin prices has pushed IBIT toward becoming the fastest ETF ever to reach $100 billion in assets, a record previously held by a large equity fund that took roughly 2,000 days to achieve that mark; IBIT has done so in about 435 days.

BlackRock's scale in the market now gives IBIT a dominant...