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William von Mueffling’s Blackrock BLK Stock Holding History

William von Mueffling’s Portfolio BLK Stock Details BLK Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$20.1M Sell
20,873
-432,409
-95% -$447M 3.02% 12
2026
Q1 		$436M Sell
453,282
-60,970
-12% -$64.1M 2.9% 11
2025
Q4 		$550M Buy
514,252
+3,850
+0.8% +$4.21M 2.98% 11
2025
Q3 		$595M Sell
510,402
-5,625
-1% -$6.29M 3.28% 10
2025
Q2 		$541M Buy
516,027
+48,173
+10% +$45.6M 3.13% 12
2025
Q1 		$443M Sell
467,854
-15,939
-3% -$15.6M 2.87% 15
2024
Q4 		$496M Sell
483,793
-4,906
-1% -$4.98M 3% 12
2024
Q3 		$464M Sell
488,699
-22,990
-4% -$19.9M 2.84% 16
2024
Q2 		$403M Buy
511,689
+32,772
+7% +$25.6M 2.69% 15
2024
Q1 		$399M Sell
478,917
-10,207
-2% -$8.2M 2.51% 20
2023
Q4 		$397M Sell
489,124
-12,577
-3% -$8.78M 2.65% 17
2023
Q3 		$324M Buy
501,701
+2,325
+0.5% +$1.62M 2.41% 22
2023
Q2 		$345M Buy
499,376
+67,000
+15% +$44.9M 2.41% 20
2023
Q1 		$289M Sell
432,376
-5,272
-1% -$3.71M 2.36% 23
2022
Q4 		$310M Buy
437,648
+11,959
+3% +$7.99M 2.63% 17
2022
Q3 		$234M Buy
425,689
+53,808
+14% +$35.2M 2.12% 26
2022
Q2 		$226M Buy
371,881
+142,602
+62% +$92.9M 1.89% 28
2022
Q1 		$175M Buy
229,279
+126,984
+124% +$99.2M 1.25% 33
2021
Q4 		$93.7M Buy
+102,295
New +$93.3M 0.62% 38

Other funds holding BLK

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Temasek Holdings
Temasek Holdings Singapore $37.3B AUM 12.6% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

William von Mueffling's BLK Position: Q2 2026 in Review

William von Mueffling reduced its Blackrock (BLK) stake by 95% in Q2 2026, selling an estimated $447M and leaving 20,873 shares worth $20.1M. The position accounts for 3.02% of the portfolio, ranked #12.

William von Mueffling first reported a position in BLK in Q4 2021 and has held it in 19 quarters since. The position peaked at $595M in Q3 2025. 2,319 funds tracked by Wall St. Rank hold BLK as of Q2 2026.

  • William von Mueffling held 20,873 shares of Blackrock worth $20.1M as of Q2 2026.
  • William von Mueffling sold 432,409 Blackrock shares in Q2 2026, an estimated $447M.
  • Blackrock made up 3.02% of William von Mueffling's portfolio in Q2 2026, its #12 holding.
  • William von Mueffling first reported a position in Blackrock in Q4 2021 and has held it in 19 quarters since.
  • William von Mueffling's Blackrock position peaked at $595M in Q3 2025.
  • 2,319 funds tracked by Wall St. Rank held Blackrock as of Q2 2026.

Based on Cantillon Capital Management's 13F filing for Q2 2026, filed 29 Jul 2026.