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William Blair Investment Management Portfolio holdings
AUM
$33.3B
1-Year Est. Return
44.76%
This Fund
S&P 500
This Quarter
Est. Return
+17.18%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
AUM
$37.7B
AUM Growth
+$2.06B
(+5.8%)
Cap. Flow
-$2.27B
Cap. Flow
% of AUM
-6.03%
Top 10 Holdings %
Top 10 Hldgs %
30.35%
Holding
461
New
38
Increased
117
Reduced
257
Closed
44
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
BWX Technologies
BWXT
|
+$149M |
| 2 |
Maplebear
CART
|
+$145M |
| 3 |
BellRing Brands
BRBR
|
+$144M |
| 4 |
Oracle
ORCL
|
+$139M |
| 5 |
P
Everpure Inc
P
|
+$130M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Yum China
YUMC
|
+$217M |
| 2 |
Palo Alto Networks
PANW
|
+$192M |
| 3 |
e.l.f. Beauty
ELF
|
+$177M |
| 4 |
Stride
LRN
|
+$176M |
| 5 |
GTLS
Chart Industries
GTLS
|
+$153M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 35.89% |
| 2 | Consumer Discretionary | 15.09% |
| 3 | Financials | 13.13% |
| 4 | Healthcare | 10.3% |
| 5 | Industrials | 9.46% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
251
GXO Logistics
GXO
$5.51B
| $25.9M | 0.07% |
530,999
+182,338
| +52% | +$7.27M |
|
252
Kulicke & Soffa
KLIC
$4.99B
| $25.6M | 0.07% |
740,721
-57,519
| -7% | -$1.87M |
|
|
253
Yum China
YUMC
$16.4B
| $25.5M | 0.07% |
569,715
-4,853,287
| -89% | -$217M |
|
254
PDF Solutions
PDFS
$2.17B
| $25.4M | 0.07% |
1,187,083
+61,124
| +5% | +$1.16M |
|
255
Donnelley Financial Solutions
DFIN
$1.16B
| $25.3M | 0.07% |
410,773
+19,261
| +5% | +$993K |
|
|
256
e.l.f. Beauty
ELF
$5.57B
| $25.1M | 0.07% |
201,925
-2,075,714
| -91% | -$177M |
|
|
AAMI
257
Acadian Asset Management
AAMI
$3.24B
| $25.1M | 0.07% |
712,082
-428,343
| -38% | -$12.5M |
|
258
La-Z-Boy
LZB
$1.66B
| $25.1M | 0.07% |
674,602
-54,561
| -7% | -$2.18M |
|
259
NorthWestern Energy
NWE
$4.35B
| $24.8M | 0.07% |
483,874
-40,404
| -8% | -$2.23M |
|
260
Owens Corning
OC
$12.3B
| $24.6M | 0.07% |
179,043
+779
| +0.4% | +$108K |
|
261
HUB Group
HUBG
$2.39B
| $24.5M | 0.07% |
732,778
-66,595
| -8% | -$2.23M |
|
|
VRNT
262
DELISTED
Verint Systems
VRNT
| $24.5M | 0.06% |
1,244,068
-102,133
| -8% | -$1.78M |
|
263
Cognex
CGNX
$10.4B
| $24.4M | 0.06% |
769,087
-4,828,764
| -86% | -$138M |
|
|
PPBI
264
DELISTED
Pacific Premier Bancorp
PPBI
| $24.3M | 0.06% |
1,153,528
-94,333
| -8% | -$1.96M |
|
265
Signet Jewelers
SIG
$3.61B
| $24.3M | 0.06% |
304,884
+1,295
| +0.4% | +$86.1K |
|
266
SiTime
SITM
$20.9B
| $24M | 0.06% |
112,789
+4,469
| +4% | +$808K |
|
267
Modine Manufacturing
MOD
$10.8B
| $23.6M | 0.06% |
239,800
+48,492
| +25% | +$4.33M |
|
268
Matador Resources
MTDR
$6.46B
| $23.3M | 0.06% |
487,675
-41,163
| -8% | -$1.82M |
|
269
Armstrong World Industries
AWI
$7.77B
| $23.1M | 0.06% |
142,139
-89,974
| -39% | -$13.4M |
|
270
Winmark
WINA
$1.26B
| $23M | 0.06% |
60,835
-27,601
| -31% | -$10.7M |
|
271
Flowserve
FLS
$10.2B
| $22.5M | 0.06% |
429,256
+420,835
| +4,997% | +$19.8M |
|
272
Greif
GEF
$5.02B
| $21.8M | 0.06% |
334,963
-175,752
| -34% | -$10M |
|
273
ADT
ADT
$5.35B
| $21.7M | 0.06% |
2,566,675
+11,161
| +0.4% | +$91.4K |
|
274
CBIZ
CBZ
$2.97B
| $21.7M | 0.06% |
+303,146
| New | +$21.9M |
|
275
JPMorgan Chase
JPM
$971B
| $21.7M | 0.06% |
74,958
-124,581
| -62% | -$31.8M |
|
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William Blair Investment Management's Q2 2025 Portfolio in Review
As of Q2 2025, William Blair Investment Management held 461 positions worth $37.7B, up 5.8% from $35.6B the previous quarter. Its ten largest holdings account for 30% of the portfolio.
William Blair Investment Management withdrew a net $2.27B in Q2 2025, closing 44 positions and reducing 257 holdings. Its most notable exit was The AZEK Co, an estimated $123M position sold in full.
By sector, the portfolio is most concentrated in Technology at 36% of assets, up from 33% a quarter earlier, followed by Consumer Discretionary and Financials.
Against the trend, William Blair Investment Management opened a new position in Maplebear worth $151M.
- William Blair Investment Management's largest Q2 2025 buy was Maplebear: 3,345,792 shares worth $151M.
- William Blair Investment Management added most to BWX Technologies in Q2 2025, an estimated $149M increase.
- William Blair Investment Management's biggest Q2 2025 reduction was Yum China, cutting an estimated $217M.
- William Blair Investment Management fully exited The AZEK Co in Q2 2025, selling an estimated $123M.
- William Blair Investment Management's ten largest holdings make up 30% of its $37.7B portfolio in Q2 2025.
- William Blair Investment Management opened 38 new positions and closed 44 in Q2 2025.
- William Blair Investment Management's portfolio value rose 5.8% quarter-over-quarter to $37.7B.
Based on William Blair Investment Management's 13F filing for Q2 2025, filed 29 Jul 2025.