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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 | |
|---|---|---|---|---|---|---|
276
Mirion Technologies
MIR
$3.88B
| $21.7M | 0.06% |
1,005,847
-725,544
| -42% | -$12.5M |
|
277
Expro Ltd
XPRO
$2.08B
| $21.5M | 0.06% |
2,497,241
-203,448
| -8% | -$1.73M |
|
278
PBF Energy
PBF
$8.8B
| $21.4M | 0.06% |
989,117
-81,176
| -8% | -$1.54M |
|
|
BKV
279
BKV Corp
BKV
$2.84B
| $21.3M | 0.06% |
883,730
+38,689
| +5% | +$800K |
|
280
Matsons
MATX
$6.45B
| $21M | 0.06% |
+188,931
| New | +$20.7M |
|
281
Helios Technologies
HLIO
$2.66B
| $21M | 0.06% |
+630,387
| New | +$19M |
|
282
Spire
SR
$4.89B
| $20.9M | 0.06% |
285,896
-22,247
| -7% | -$1.67M |
|
283
Alignment Healthcare
ALHC
$2.82B
| $20.7M | 0.05% |
1,478,571
-418,757
| -22% | -$6.74M |
|
284
Grand Canyon Education
LOPE
$3.79B
| $19.7M | 0.05% |
+104,363
| New | +$19.3M |
|
285
Intuitive Surgical
ISRG
$142B
| $19.4M | 0.05% |
35,775
-50,620
| -59% | -$26.5M |
|
286
Zeta Global
ZETA
$7.3B
| $19.3M | 0.05% |
1,247,870
+339,247
| +37% | +$4.51M |
|
287
Embecta
EMBC
$287M
| $19.3M | 0.05% |
1,992,604
+14,232
| +0.7% | +$160K |
|
288
Procept Biorobotics
PRCT
$1.26B
| $18.9M | 0.05% |
328,621
+7,317
| +2% | +$414K |
|
|
INVX
289
Innovex International
INVX
$2.15B
| $18.7M | 0.05% |
1,195,498
-98,857
| -8% | -$1.52M |
|
290
ZipRecruiter
ZIP
$381M
| $18.3M | 0.05% |
3,652,456
-1,862,343
| -34% | -$10.2M |
|
291
Sunstone Hotel Investors
SHO
$2.02B
| $18.3M | 0.05% |
2,106,816
-175,435
| -8% | -$1.51M |
|
292
Treace Medical Concepts
TMCI
$306M
| $18.2M | 0.05% |
3,099,895
+39,283
| +1% | +$256K |
|
293
Edgewell Personal Care
EPC
$1.31B
| $18.2M | 0.05% |
778,289
-63,528
| -8% | -$1.76M |
|
294
Pebblebrook Hotel Trust
PEB
$2.05B
| $17.7M | 0.05% |
1,773,609
-293,545
| -14% | -$2.73M |
|
295
Intercontinental Exchange
ICE
$86.8B
| $17.6M | 0.05% |
95,810
-111,602
| -54% | -$19.2M |
|
296
Marten Transport
MRTN
$1.24B
| $17.2M | 0.05% |
1,320,316
-110,583
| -8% | -$1.46M |
|
297
Yeti Holdings
YETI
$3.4B
| $17M | 0.05% |
+538,081
| New | +$16.1M |
|
298
Grid Dynamics Holdings
GDYN
$643M
| $16.8M | 0.04% |
1,456,824
+67,781
| +5% | +$891K |
|
|
JCAP
299
Jefferson Capital
JCAP
$1.34B
| $16.7M | 0.04% |
+905,000
| New | +$16.9M |
|
|
AHL
300
DELISTED
Aspen Insurance
AHL
| $16.5M | 0.04% |
+523,682
| New | +$17.5M |
|
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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.