BLK fund manager activity
BlackRock, Inc · NYSE. Reported by 13 tracked fund managers in their 13F filings, Q4 2024 to Q2 2026.
Q4 2025
| Manager | Activity | Shares | Value | % of portfolio | Filed |
|---|
| Ron Baron - Baron Capital | Trimmed | 1,052 | $1,125,998 | 0.00% | Feb 17, 2026 |
| William Von Mueffling - Cantillon Capital Management | Added | 514,252 | $550,424,485 | 2.98% | Feb 11, 2026 |
| Dodge & Cox Funds | Added | 711 | $761,012 | 0.00% | Feb 13, 2026 |
| Ken Fisher - Fisher Asset Management | Trimmed | 1,824,359 | $1,952,685,181 | 0.67% | Feb 9, 2026 |
| Jeremy Grantham - GMO | No change | 1,221 | $1,306,885 | 0.00% | Feb 17, 2026 |
| Joel Greenblatt - Gotham Asset Management | Added | 20,195 | $21,615,516 | 0.08% | Feb 17, 2026 |
| Hillman Capital Management | Trimmed | 333 | $356,423 | 0.22% | Feb 17, 2026 |
| Mairs & Power Funds | Trimmed | 190 | $203,365 | 0.00% | Feb 17, 2026 |
| Thomas Gayner - Markel Group | No change | 220,200 | $235,688,869 | 1.88% | Feb 6, 2026 |
| Bill Nygren - Oakmark Funds | Trimmed | 54,409 | $58,236,129 | 0.07% | Feb 17, 2026 |
| Ruane Cunniff LP | Sold out | — | — | 0.00% | Feb 13, 2026 |
| ValueAct Capital | New | 695,000 | $743,886,300 | 10.6% | Feb 17, 2026 |
| Viking Global Investors | Sold out | — | — | 0.00% | Feb 17, 2026 |
Q3 2025
| Manager | Activity | Shares | Value | % of portfolio | Filed |
|---|
| Ron Baron - Baron Capital | No change | 1,100 | $1,282,457 | 0.00% | Nov 14, 2025 |
| William Von Mueffling - Cantillon Capital Management | Trimmed | 510,402 | $595,062,379 | 3.28% | Feb 17, 2026 |
| Dodge & Cox Funds | No change | 655 | $763,645 | 0.00% | Nov 13, 2025 |
| Ken Fisher - Fisher Asset Management | Trimmed | 1,902,167 | $2,217,681,465 | 0.80% | Nov 12, 2025 |
| Jeremy Grantham - GMO | Trimmed | 1,221 | $1,423,527 | 0.00% | Nov 13, 2025 |
| Joel Greenblatt - Gotham Asset Management | Added | 20,091 | $23,423,494 | 0.10% | Nov 14, 2025 |
| Hillman Capital Management | Trimmed | 342 | $398,728 | 0.23% | Nov 14, 2025 |
| Mairs & Power Funds | New | 331 | $385,903 | 0.00% | Nov 14, 2025 |
| Thomas Gayner - Markel Group | No change | 220,200 | $256,724,574 | 2.08% | Oct 31, 2025 |
| Bill Nygren - Oakmark Funds | Trimmed | 66,698 | $77,761,197 | 0.12% | Nov 14, 2025 |
| Ruane Cunniff LP | New | 186 | $216,852 | 0.00% | Nov 14, 2025 |
| Viking Global Investors | Added | 619,492 | $722,247,138 | 1.88% | Nov 14, 2025 |
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