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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 | |
|---|---|---|---|---|---|---|
201
First Bancorp
FBNC
$2.7B
| $31.1M | 0.08% |
705,343
-56,769
| -7% | -$2.3M |
|
202
Alaska Air
ALK
$5.4B
| $31M | 0.08% |
625,764
+621,182
| +13,557% | +$30.2M |
|
203
Korn Ferry
KFY
$4.25B
| $30.9M | 0.08% |
421,760
-34,013
| -7% | -$2.27M |
|
204
Cracker Barrel
CBRL
$1.25B
| $30.8M | 0.08% |
504,357
-40,328
| -7% | -$2.03M |
|
205
Coupang
CPNG
$29.7B
| $30.8M | 0.08% |
+1,027,457
| New | +$26.3M |
|
206
Rexford Industrial Realty
REXR
$8.07B
| $30.7M | 0.08% |
862,313
+3,121
| +0.4% | +$109K |
|
207
Atlantic Union Bankshares
AUB
$6.02B
| $30.4M | 0.08% |
973,180
-77,630
| -7% | -$2.24M |
|
208
Vista Energy
VIST
$7.33B
| $30M | 0.08% |
627,389
-531,890
| -46% | -$25.2M |
|
|
STEL
209
DELISTED
Stellar Bancorp
STEL
| $29.9M | 0.08% |
1,068,582
-86,451
| -7% | -$2.3M |
|
210
StepStone Group
STEP
$4.07B
| $29.7M | 0.08% |
535,125
+22,871
| +4% | +$1.22M |
|
211
Vishay Intertechnology
VSH
$5.11B
| $29.7M | 0.08% |
1,868,008
-152,770
| -8% | -$2.12M |
|
212
Commercial Metals
CMC
$7.97B
| $29.6M | 0.08% |
605,343
-49,715
| -8% | -$2.3M |
|
213
Janus International
JBI
$690M
| $29.6M | 0.08% |
3,637,259
-286,291
| -7% | -$2.18M |
|
|
UMH
214
UMH Properties
UMH
$1.38B
| $29.5M | 0.08% |
1,757,148
-147,297
| -8% | -$2.52M |
|
215
Jones Lang LaSalle
JLL
$16.7B
| $29.3M | 0.08% |
114,657
-253,399
| -69% | -$58.1M |
|
216
Diodes
DIOD
$4.75B
| $29.3M | 0.08% |
553,487
-44,239
| -7% | -$1.95M |
|
217
LXP Industrial Trust
LXP
$3.58B
| $29.2M | 0.08% |
708,204
-58,535
| -8% | -$2.41M |
|
|
THR
218
DELISTED
Thermon Group Holdings
THR
| $29.2M | 0.08% |
1,039,795
-82,523
| -7% | -$2.24M |
|
219
Belden
BDC
$5.26B
| $29.1M | 0.08% |
251,641
-20,381
| -7% | -$2.14M |
|
220
Pinnacle Financial Partners Inc
PNFP
$16B
| $29.1M | 0.08% |
263,708
-21,431
| -8% | -$2.21M |
|
221
Silgan Holdings
SLGN
$4.35B
| $29.1M | 0.08% |
+536,232
| New | +$28.3M |
|
222
Atmus Filtration Technologies
ATMU
$4.04B
| $29M | 0.08% |
797,283
-62,808
| -7% | -$2.24M |
|
223
Knowles
KN
$3.29B
| $28.9M | 0.08% |
1,640,067
-132,884
| -7% | -$2.15M |
|
|
AL
224
DELISTED
Air Lease Corp
AL
| $28.8M | 0.08% |
491,811
-272,833
| -36% | -$14.2M |
|
225
TriNet
TNET
$3.06B
| $28.6M | 0.08% |
391,586
-30,753
| -7% | -$2.44M |
|
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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.