BlackRock has added 2,270 BTC worth about $262.7 million and 78.922 ETH worth $357.4 million to its bitcoin portfolio. Thus, the total volume of the company's bitcoins exceeded 757,000 BTC worth $87.23 billion, and the volume of Ethereum — 3.68 million ETH worth $16.95 billion.

According to analyst Thomas Farer, BlackRock now controls 762,000 BTC through its iShares Bitcoin Trust (IBIT) fund. The dynamics of savings can be seen in the chart below.

From the beginning of 2024 to mid-September 2025, IBIT's bitcoin assets grew from less than 100,000 BTC to 751,000 BTC, making the company one of the largest owners of the main cryptocurrency.

According to Arkham, the company's total crypto portfolio increased from $99.88 billion on September 9 to $104.18 billion on September 16, an increase of $4.31 billion over the week. Most of this growth is due to the growth of Bitcoin and Ethereum. BTC gained almost $4,000 (+3.59%) over the week, increasing BlackRock's positions by $3.66 billion, while ETH gained about $292 (+6.78%), increasing positions by $645 million.

Interestingly, despite the increase in the dollar value of Ethereum, the number of ethers in BlackRock wallets decreased by almost 100,000 ETH over the same period. Sales against the background of rising prices demonstrate how volatile the trading activity of institutions can be.