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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 | |
|---|---|---|---|---|---|---|
76
FTAI Aviation
FTAI
$23.2B
| $149M | 0.4% |
1,296,965
-128,013
| -9% | -$14.3M |
|
77
EPAM Systems
EPAM
$5.15B
| $149M | 0.4% |
841,922
+145,411
| +21% | +$24.3M |
|
78
Twist Bioscience
TWST
$7.72B
| $144M | 0.38% |
3,906,604
+99,737
| +3% | +$3.45M |
|
79
Globus Medical
GMED
$11.4B
| $142M | 0.38% |
2,405,031
+131,244
| +6% | +$8.48M |
|
80
EXL Service
EXLS
$5.29B
| $140M | 0.37% |
3,187,528
-742,451
| -19% | -$33.9M |
|
81
Parsons
PSN
$5.15B
| $136M | 0.36% |
1,889,281
+793,807
| +72% | +$52.4M |
|
82
Carpenter Technology
CRS
$26.7B
| $135M | 0.36% |
+487,697
| New | +$106M |
|
83
Apollo Global Management
APO
$82.8B
| $131M | 0.35% |
926,495
-18,710
| -2% | -$2.48M |
|
84
Novanta
NOVT
$6.34B
| $126M | 0.34% |
979,893
+51,005
| +5% | +$6.21M |
|
|
85
BellRing Brands
BRBR
$1.34B
| $125M | 0.33% |
+2,153,932
| New | +$144M |
|
86
Eagle Materials
EXP
$6.57B
| $124M | 0.33% |
611,745
+222,537
| +57% | +$48M |
|
87
Glaukos
GKOS
$10.7B
| $117M | 0.31% |
1,136,095
+390,805
| +52% | +$36.7M |
|
88
ICICI Bank
IBN
$107B
| $117M | 0.31% |
3,467,487
-250,098
| -7% | -$8.28M |
|
89
Guidewire Software
GWRE
$14.7B
| $113M | 0.3% |
478,448
-99,466
| -17% | -$21.4M |
|
90
Old National Bancorp
ONB
$10.3B
| $111M | 0.3% |
5,224,552
-668,121
| -11% | -$13.8M |
|
91
Onto Innovation
ONTO
$19.5B
| $111M | 0.29% |
1,098,860
+952,419
| +650% | +$102M |
|
|
EXAS
92
DELISTED
Exact Sciences
EXAS
| $107M | 0.28% |
2,020,170
-228,868
| -10% | -$11.6M |
|
93
Advanced Drainage Systems
WMS
$10.8B
| $107M | 0.28% |
933,595
-79,660
| -8% | -$8.92M |
|
94
Credicorp
BAP
$30B
| $107M | 0.28% |
477,765
+48,135
| +11% | +$9.76M |
|
95
Evercore
EVR
$11.7B
| $107M | 0.28% |
+395,088
| New | +$86.9M |
|
96
Grab
GRAB
$15.3B
| $106M | 0.28% |
21,150,368
+8,707,738
| +70% | +$40.6M |
|
97
Madrigal Pharmaceuticals
MDGL
$12.4B
| $106M | 0.28% |
350,289
-2,866
| -0.8% | -$854K |
|
98
Freshpet
FRPT
$3.45B
| $104M | 0.28% |
1,527,068
+260,868
| +21% | +$20.4M |
|
99
MakeMyTrip
MMYT
$5.78B
| $104M | 0.27% |
1,056,358
+195,542
| +23% | +$19.7M |
|
100
Inspire Medical Systems
INSP
$1.71B
| $99.8M | 0.26% |
769,169
+76,251
| +11% | +$11.1M |
|
Similar funds
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.