William Blair & Company’s Blackrock BLK Stock Holding History

Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake
Trade Value Portfolio Weight Portfolio Position
2026
Q1
$57M Sell
59,288
-7,312
-11% -$7.69M 0.16% 130
2025
Q4
$71.3M Sell
66,600
-3,410
-5% -$3.73M 0.19% 120
2025
Q3
$81.6M Buy
70,010
+528
+0.8% +$590K 0.22% 106
2025
Q2
$72.9M Buy
69,482
+3,674
+6% +$3.47M 0.2% 112
2025
Q1
$62.3M Buy
65,808
+13,185
+25% +$12.9M 0.19% 120
2024
Q4
$53.9M Buy
+52,623
New +$53.4M 0.16% 128
2024
Q3
Sell
-53,332
Closed -$42M 1830
2024
Q2
$42M Buy
53,332
+5,730
+12% +$4.47M 0.13% 134
2024
Q1
$39.7M Buy
47,602
+148
+0.3% +$119K 0.12% 141
2023
Q4
$38.5M Sell
47,454
-16,423
-26% -$11.5M 0.13% 141
2023
Q3
$41.3M Sell
63,877
-544
-0.8% -$380K 0.16% 127
2023
Q2
$44.5M Sell
64,421
-2,778
-4% -$1.86M 0.16% 126
2023
Q1
$45M Buy
67,199
+167
+0.2% +$118K 0.18% 120
2022
Q4
$47.5M Sell
67,032
-7,978
-11% -$5.33M 0.21% 110
2022
Q3
$41.3M Buy
75,010
+5,375
+8% +$3.52M 0.19% 117
2022
Q2
$42.4M Sell
69,635
-1,218
-2% -$793K 0.19% 119
2022
Q1
$54.1M Buy
70,853
+473
+0.7% +$370K 0.19% 116
2021
Q4
$64.4M Buy
70,380
+572
+0.8% +$522K 0.2% 113
2021
Q3
$58.5M Buy
69,808
+1,616
+2% +$1.45M 0.2% 117
2021
Q2
$59.7M Sell
68,192
-86
-0.1% -$72.6K 0.21% 112
2021
Q1
$51.5M Buy
68,278
+3,463
+5% +$2.51M 0.19% 121
2020
Q4
$46.8M Buy
64,815
+2,087
+3% +$1.38M 0.17% 127
2020
Q3
$35.4M Buy
62,728
+2,247
+4% +$1.28M 0.15% 138
2020
Q2
$32.9M Sell
60,481
-273
-0.4% -$138K 0.16% 132
2020
Q1
$26.7M Buy
60,754
+1,986
+3% +$979K 0.17% 130
2019
Q4
$29.5M Buy
58,768
+19,235
+49% +$9.13M 0.15% 145
2019
Q3
$17.6M Buy
39,533
+74
+0.2% +$33K 0.1% 188
2019
Q2
$18.5M Buy
39,459
+636
+2% +$288K 0.11% 179
2019
Q1
$16.6M Sell
38,823
-6,162
-14% -$2.59M 0.1% 189
2018
Q4
$17.7M Sell
44,985
-13,769
-23% -$5.64M 0.13% 164
2018
Q3
$27.7M Sell
58,754
-12,881
-18% -$6.26M 0.17% 132
2018
Q2
$35.7M Buy
71,635
+511
+0.7% +$270K 0.24% 103
2018
Q1
$38.5M Buy
71,124
+310
+0.4% +$170K 0.27% 92
2017
Q4
$36.4M Buy
70,814
+1,369
+2% +$665K 0.25% 104
2017
Q3
$31M Sell
69,445
-109
-0.2% -$46.5K 0.23% 109
2017
Q2
$29.4M Buy
69,554
+1,940
+3% +$774K 0.22% 113
2017
Q1
$26.2M Sell
67,614
-1,114
-2% -$426K 0.21% 124
2016
Q4
$26.2M Sell
68,728
-1,212
-2% -$444K 0.23% 113
2016
Q3
$25.4M Buy
69,940
+2,357
+3% +$858K 0.22% 111
2016
Q2
$23.1M Sell
67,583
-1,426
-2% -$501K 0.22% 122
2016
Q1
$23.5M Sell
69,009
-1,906
-3% -$604K 0.22% 121
2015
Q4
$24.1M Buy
70,915
+3,570
+5% +$1.21M 0.23% 117
2015
Q3
$20M Sell
67,345
-8,319
-11% -$2.68M 0.17% 144
2015
Q2
$26.2M Sell
75,664
-788
-1% -$287K 0.04% 524
2015
Q1
$28M Sell
76,452
-760
-1% -$275K 0.04% 471
2014
Q4
$27.6M Sell
77,212
-516
-0.7% -$176K 0.04% 484
2014
Q3
$25.5M Buy
77,728
+25,844
+50% +$8.32M 0.04% 489
2014
Q2
$16.6M Buy
51,884
+370
+0.7% +$113K 0.03% 643
2014
Q1
$16.2M Sell
51,514
-12,065
-19% -$3.69M 0.03% 647
2013
Q4
$20.1M Buy
63,579
+128
+0.2% +$38.2K 0.03% 538
2013
Q3
$17.2M Sell
63,451
-6,023
-9% -$1.64M 0.03% 556
2013
Q2
$17.8M Buy
+69,474
New +$18.6M 0.04% 509

Other funds holding BLK

William Blair & Company's BLK Position: Q1 2026 in Review

William Blair & Company reduced its Blackrock (BLK) stake by 11% in Q1 2026, selling an estimated $7.69M and leaving 59,288 shares worth $57M. The position accounts for 0.16% of the portfolio, ranked #130.

William Blair & Company first reported a position in BLK in Q2 2013 and has held it in 51 quarters since. The position peaked at $81.6M in Q3 2025. 2,322 funds tracked by Wall St. Rank hold BLK as of Q1 2026.

  • William Blair & Company held 59,288 shares of Blackrock worth $57M as of Q1 2026.
  • William Blair & Company sold 7,312 Blackrock shares in Q1 2026, an estimated $7.69M.
  • Blackrock made up 0.16% of William Blair & Company's portfolio in Q1 2026, its #130 holding.
  • William Blair & Company first reported a position in Blackrock in Q2 2013 and has held it in 51 quarters since.
  • William Blair & Company's Blackrock position peaked at $81.6M in Q3 2025.
  • 2,322 funds tracked by Wall St. Rank held Blackrock as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.