13FAI ai-powered hedge fund tracker

BLACKROCK INC (BLK) — Hedge Fund Ownership Q4 2025

BLK
Q4 2025Q3 2025Q2 2025Q1 2025
# Fund % of Portfolio † Shares † Shares vs Prior Quarter † Shares vs Prior Year † Aggregate Value † Reported Price * Option
1
ValueAct Capital
10.59% 695K NEW $743.9M $1,070.34
2
Cantillon Capital Management
William von Mueffling
2.98% 514K +0.75% +6.30% $550.4M $1,070.34
3
Markel Group
Tom Gayner
1.88% 220K $235.7M $1,070.34
4
Hillman Capital Management
Mark Hillman
0.22% 333 -2.63% +0.60% $356,423 $1,070.34
5
Mairs & Power
0.00% 190 -42.60% $203,365 $1,070.34
6
Dodge & Cox
0.00% 711 +8.55% -5.20% $761,012 $1,070.34
Ruane, Cunniff & Goldfarb / Sequoia Fund
John Harris
EXITED
Viking Global Investors
Andreas Halvorsen
EXITED
6 Total 1.4M -45.57% +4.31% $1.53B
* Reported price is not an actual purchase or sale price. It is the price as of the last portfolio date.
† Portfolio value, share counts, and period-over-period changes exclude options positions (PUT/CALL), which are shown in the Option column for reference only.