William Blair Investment Management, LLC Portfolio Holdings

William Blair Investment Management, LLC

  • $34.7 Billion
  • Q2 2025

William Blair Investment Management, LLC has filed its 13F form on July 29, 2025 for Q2 2025 where it was disclosed a total value porftolio of $34.7 Billion distributed in 417 stocks.

Among their holdings, we can observe that their the top five positions include companies like: Microsoft Corp with a value of $1.98B, Nvidia Corp with a value of $1.94B, Taiwan Semiconductor Manufacturing CO LTD with a value of $1.5B, Amazon Com Inc with a value of $1.18B, and Apple Inc. with a value of $1.08B.

Examining the 13F form we can see an increase of $1.95B in the current position value, from $32.7B to 34.7B.

William Blair Investment Management, LLC is based out at Chicago, IL

Below you can find more details about William Blair Investment Management, LLC portfolio as well as his latest detailed transactions.

Portfolio value $34.7 Billion
Technology: $13 Billion
Consumer Cyclical: $5.3 Billion
Financial Services: $4.25 Billion
Industrials: $3.7 Billion
Healthcare: $3.5 Billion
Communication Services: $1.79 Billion
Consumer Defensive: $1.4 Billion
Basic Materials: $565 Million
Other: $1.2 Billion

Stock Holdings Table

Stock Market Cap. Holding Value (Reported) # of Shares. Last Trade Trade History
$3.95T
$1.98 Billion 5.71% of portfolio
3,981,721
Q2 2025 Reduced 3.52%
$456B
$1.94 Billion 5.59% of portfolio
12,272,393
Q2 2025 Added 0.61%
$1.27T
$1.5 Billion 4.32% of portfolio
6,622,255
Q2 2025 Reduced 10.04%
$2.26T
$1.18 Billion 3.41% of portfolio
5,400,353
Q2 2025 Reduced 11.73%
$3.69T
$1.08 Billion 3.11% of portfolio
5,253,841
Q2 2025 Added 0.28%
$1.78T
$1.05 Billion 3.04% of portfolio
1,429,121
Q2 2025 Reduced 9.1%
$127B
$816 Million 2.35% of portfolio
2,959,172
Q2 2025 Reduced 3.89%
$548B
$686 Million 1.98% of portfolio
1,220,265
Q2 2025 Added 0.41%
$118B
$624 Million 1.8% of portfolio
238,599
Q2 2025 Reduced 6.64%
$97.8B
$574 Million 1.65% of portfolio
3,588,147
Q2 2025 Reduced 2.44%
$23.4B
$511 Million 1.47% of portfolio
9,949,455
Q2 2025 Reduced 18.26%
$16.9B
$417 Million 1.2% of portfolio
4,739,103
Q2 2025 Added 41.71%
$201B
$407 Million 1.17% of portfolio
517,131
Q2 2025 Reduced 10.16%
$439B
$373 Million 1.07% of portfolio
376,485
Q2 2025 Added 6.48%
$54.3B
$367 Million 1.06% of portfolio
685,088
Q2 2025 Added 7.53%
$172B
$360 Million 1.04% of portfolio
350,569
Q2 2025 Reduced 4.44%
$6.4B
$319 Million 0.92% of portfolio
3,544,083
Q2 2025 Added 1,269.25%
$6.83B
$320 Million 0.92% of portfolio
5,219,394
Q2 2025 Added 13.85%
$37.5B
$292 Million 0.84% of portfolio
2,171,076
Q2 2025 Added 21.58%
$33.9B
$287 Million 0.83% of portfolio
3,869,291
Q2 2025 Added 15.07%
$17.8B
$284 Million 0.82% of portfolio
4,926,836
Q2 2025 Added 112.86%
$133B
$285 Million 0.82% of portfolio
371,786
Q2 2025 Reduced 13.62%
$34.7B
$261 Million 0.75% of portfolio
2,214,487
Q2 2025 Added 19.68%
$182B
$257 Million 0.74% of portfolio
2,752,538
Q2 2025 Reduced 5.56%
$3.93B
$253 Million 0.73% of portfolio
4,695,683
Q2 2025 Reduced 12.59%
$14.5B
$254 Million 0.73% of portfolio
685,769
Q2 2025 Reduced 2.36%
$36.4B
$246 Million 0.71% of portfolio
1,625,015
Q2 2025 Reduced 8.22%
$2.29B
$240 Million 0.69% of portfolio
9,639,102
Q2 2025 Added 3.84%
$15.3B
$228 Million 0.66% of portfolio
3,113,936
Q2 2025 Added 29.51%
$13.4B
$230 Million 0.66% of portfolio
4,163,361
Q2 2025 Reduced 17.75%
$16.3B
$219 Million 0.63% of portfolio
1,517,356
Q2 2025 Added 523.24%
$14.2B
$220 Million 0.63% of portfolio
2,708,540
Q2 2025 Added 35.05%
$2.41B
$216 Million 0.62% of portfolio
5,402,750
Q2 2025 Reduced 2.87%
$245B
$213 Million 0.62% of portfolio
684,141
Q2 2025 Added 9.46%
$23.5B
$213 Million 0.61% of portfolio
358,474
Q2 2025 Added 16.18%
$11.2B
$212 Million 0.61% of portfolio
4,314,945
Q2 2025 Reduced 36.58%
$81.5B
$211 Million 0.61% of portfolio
430,828
Q2 2025 Reduced 28.57%
$5.05B
$208 Million 0.6% of portfolio
1,800,155
Q2 2025 Reduced 18.78%
$232B
$207 Million 0.6% of portfolio
758,766
Q2 2025 Reduced 29.98%
$33.7B
$197 Million 0.57% of portfolio
3,143,873
Q2 2025 Added 42.93%
$69.6B
$199 Million 0.57% of portfolio
29,278,462
Q2 2025 Added 51.89%
$1.09B
$193 Million 0.56% of portfolio
8,812,876
Q2 2025 Reduced 0.3%
$8.95B
$190 Million 0.55% of portfolio
1,738,944
Q2 2025 Reduced 5.68%
$684B
$188 Million 0.54% of portfolio
861,343
Q2 2025 New
$5.28B
$184 Million 0.53% of portfolio
2,319,569
Q2 2025 Reduced 1.55%
$4.31B
$184 Million 0.53% of portfolio
1,965,859
Q2 2025 Reduced 0.07%
$21.5B
$183 Million 0.53% of portfolio
583,139
Q2 2025 Reduced 7.22%
$6.86B
$179 Million 0.52% of portfolio
1,446,121
Q2 2025 Reduced 34.6%
$13.3B
$179 Million 0.52% of portfolio
908,334
Q2 2025 Reduced 24.31%

Summary

  • Portfolio
  • No. of Stocks 417
  • Current Value $34.7 Billion
  • Prior Value $32.7 Billion
  • Filing
  • Period Q2 2025
  • Filing Date July 29, 2025
  • Form Type 13F-HR
  • Activity in Q2 2025
  • New Purchases 38 stocks
  • Additional Purchases 118 stocks
  • Sold out of 0 stocks
  • Reduced holdings in 256 stocks
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