William Von Mueffling's Cantillon Capital Management drastically reduced its stake in asset management giant BlackRock (BLK) by 95.4% during the second quarter of 2026. The firm sold approximately 432,400 shares, reducing its position from 453,280 shares to just 20,870. The estimated value of the shares sold is $415.8 million, cutting the total reported value of the holding from $435.9 million to $20.1 million.
This trade information was disclosed in a quarterly 13F filing with the SEC, which details positions held as of June 30, 2026, but does not reveal the exact dates or prices of the transactions. Despite the massive reduction in shares, the remaining BlackRock position's weight in Cantillon's disclosed portfolio rose slightly from 2.90% to 3.02%, suggesting a larger decrease in the value of the fund's other holdings during the same period.