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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 | |
|---|---|---|---|---|---|---|
176
Lumentum
LITE
$63.8B
| $34.2M | 0.09% |
+359,698
| New | +$25.5M |
|
177
ABM Industries
ABM
$2.83B
| $34.2M | 0.09% |
723,712
-59,098
| -8% | -$2.86M |
|
178
Extreme Networks
EXTR
$3.14B
| $34.1M | 0.09% |
1,898,607
-150,975
| -7% | -$2.22M |
|
179
Kite Realty
KRG
$5.24B
| $34M | 0.09% |
1,502,797
-121,361
| -7% | -$2.67M |
|
180
Eastern Bankshares
EBC
$5.29B
| $33.8M | 0.09% |
2,214,816
-180,478
| -8% | -$2.71M |
|
181
Enterprise Financial Services Corp
EFSC
$2.4B
| $33.8M | 0.09% |
613,019
-50,627
| -8% | -$2.64M |
|
182
Sanmina
SANM
$10.9B
| $33.6M | 0.09% |
343,733
-28,098
| -8% | -$2.32M |
|
183
Four Corners Property Trust
FCPT
$2.69B
| $33.3M | 0.09% |
1,235,624
-102,165
| -8% | -$2.81M |
|
184
Renasant Corp
RNST
$3.92B
| $32.9M | 0.09% |
914,512
-75,063
| -8% | -$2.5M |
|
185
Kirby Corp
KEX
$7B
| $32.8M | 0.09% |
+289,370
| New | +$30.4M |
|
186
Tower Semiconductor
TSEM
$28.2B
| $32.6M | 0.09% |
753,004
-83,124
| -10% | -$3.19M |
|
187
Maximus
MMS
$2.84B
| $32.4M | 0.09% |
461,235
-36,473
| -7% | -$2.56M |
|
|
OPLN
188
Openlane
OPLN
$4.48B
| $32.3M | 0.09% |
1,321,639
-106,274
| -7% | -$2.24M |
|
189
Avnet
AVT
$7.87B
| $32.2M | 0.09% |
607,551
-48,771
| -7% | -$2.42M |
|
190
UL Solutions
ULS
$15.6B
| $32.1M | 0.09% |
+440,895
| New | +$28.9M |
|
|
TPH
191
DELISTED
Tri Pointe Homes
TPH
| $32.1M | 0.09% |
1,004,810
-83,470
| -8% | -$2.56M |
|
192
Lantheus
LNTH
$6.57B
| $32.1M | 0.09% |
391,622
+27,855
| +8% | +$2.45M |
|
193
ANI Pharmaceuticals
ANIP
$1.71B
| $32M | 0.08% |
490,536
-37,740
| -7% | -$2.46M |
|
|
MRX
194
Marex Group Limited Ordinary Shares
MRX
$4.31B
| $32M | 0.08% |
810,791
-865,568
| -52% | -$36M |
|
|
CSGS
195
DELISTED
CSG Systems International
CSGS
| $31.8M | 0.08% |
486,663
-39,729
| -8% | -$2.48M |
|
196
Banc of California
BANC
$3.09B
| $31.7M | 0.08% |
2,258,336
-185,341
| -8% | -$2.53M |
|
|
197
Palo Alto Networks
PANW
$313B
| $31.5M | 0.08% |
153,731
-1,035,967
| -87% | -$192M |
|
198
Huron Consulting
HURN
$2.43B
| $31.3M | 0.08% |
227,773
-18,073
| -7% | -$2.57M |
|
199
Haemonetics
HAE
$3.97B
| $31.3M | 0.08% |
419,378
-6,597
| -2% | -$437K |
|
200
Vital Farms
VITL
$496M
| $31.1M | 0.08% |
807,968
+21,127
| +3% | +$713K |
|
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GAM
VIA
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.