The statement is supported by financial reports from March 2026. Specifically, BlackRock's IBIT ETF saw a net inflow of $161.04 million on March 23, 2026, as documented by Phemex News. While the purchase was driven by ETF investor demand rather than a direct corporate balance sheet investment by BlackRock itself, the figure and the action (the fund purchasing BTC to back the shares) match the claim.