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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
-6.4%
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
$35.6B
AUM Growth
-$5.32B
(-13%)
Cap. Flow
-$1.91B
Cap. Flow
% of AUM
-5.36%
Top 10 Holdings %
Top 10 Hldgs %
26.78%
Holding
469
New
36
Increased
114
Reduced
269
Closed
46
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$515M |
| 2 |
Sea Limited
SE
|
+$179M |
| 3 |
Tyler Technologies
TYL
|
+$177M |
| 4 |
WAY
Waystar Holding Corp
WAY
|
+$167M |
| 5 |
Ciena
CIEN
|
+$159M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Advanced Micro Devices
AMD
|
+$229M |
| 2 |
Accenture
ACN
|
+$222M |
| 3 |
Penumbra
PEN
|
+$210M |
| 4 |
CF Industries
CF
|
+$201M |
| 5 |
Texas Instruments
TXN
|
+$184M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 32.57% |
| 2 | Consumer Discretionary | 15.58% |
| 3 | Financials | 13.1% |
| 4 | Healthcare | 12.15% |
| 5 | Industrials | 9.67% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
201
Armstrong World Industries
AWI
$7.75B
| $32.7M | 0.09% |
232,113
-11,414
| -5% | -$1.68M |
|
202
ZipRecruiter
ZIP
$405M
| $32.5M | 0.09% |
5,514,799
+616,149
| +13% | +$4.11M |
|
203
Sportradar
SRAD
$3.84B
| $32.3M | 0.09% |
+1,492,912
| New | +$31.1M |
|
|
ELME
204
Elme Communities
ELME
$144M
| $32.2M | 0.09% |
1,849,985
-84,878
| -4% | -$1.37M |
|
205
Vishay Intertechnology
VSH
$5.15B
| $32.1M | 0.09% |
+2,020,778
| New | +$34.6M |
|
|
STEL
206
DELISTED
Stellar Bancorp
STEL
| $31.9M | 0.09% |
1,155,033
-53,717
| -4% | -$1.51M |
|
|
CSGS
207
DELISTED
CSG Systems International
CSGS
| $31.8M | 0.09% |
526,392
-159,358
| -23% | -$9.47M |
|
208
First Merchants
FRME
$2.72B
| $31.7M | 0.09% |
784,461
-36,188
| -4% | -$1.51M |
|
209
Atmus Filtration Technologies
ATMU
$4.06B
| $31.6M | 0.09% |
+860,091
| New | +$33.9M |
|
210
Brady Corp
BRC
$4.48B
| $31.6M | 0.09% |
446,897
-20,667
| -4% | -$1.5M |
|
211
Avnet
AVT
$7.98B
| $31.6M | 0.09% |
656,322
-77,244
| -11% | -$3.91M |
|
|
THR
212
DELISTED
Thermon Group Holdings
THR
| $31.3M | 0.09% |
1,122,318
+264,685
| +31% | +$7.66M |
|
213
Korn Ferry
KFY
$4.28B
| $30.9M | 0.09% |
455,773
-20,851
| -4% | -$1.41M |
|
214
ESCO Technologies
ESE
$7.78B
| $30.8M | 0.09% |
193,713
-65,016
| -25% | -$9.74M |
|
215
CRH
CRH
$65.2B
| $30.8M | 0.09% |
350,082
-52,970
| -13% | -$5.21M |
|
216
First Bancorp
FBNC
$2.72B
| $30.6M | 0.09% |
762,112
-35,204
| -4% | -$1.49M |
|
217
NorthWestern Energy
NWE
$4.34B
| $30.3M | 0.09% |
524,278
-27,774
| -5% | -$1.51M |
|
218
Pinnacle Financial Partners Inc
PNFP
$16.1B
| $30.2M | 0.08% |
285,139
-13,073
| -4% | -$1.5M |
|
219
Columbia Banking Systems
COLB
$9.12B
| $30.2M | 0.08% |
1,209,644
-564,799
| -32% | -$15M |
|
220
Commercial Metals
CMC
$8B
| $30.1M | 0.08% |
655,058
-30,097
| -4% | -$1.46M |
|
221
Tower Semiconductor
TSEM
$29.4B
| $29.8M | 0.08% |
836,128
-201,660
| -19% | -$9.11M |
|
222
Zoetis
ZTS
$30.4B
| $29.8M | 0.08% |
181,061
-47,589
| -21% | -$7.91M |
|
223
HUB Group
HUBG
$2.46B
| $29.7M | 0.08% |
799,373
-36,586
| -4% | -$1.53M |
|
|
AAMI
224
Acadian Asset Management
AAMI
$3.27B
| $29.5M | 0.08% |
1,140,425
-52,549
| -4% | -$1.32M |
|
225
JFrog
FROG
$10.4B
| $29.2M | 0.08% |
912,259
+35,819
| +4% | +$1.25M |
|
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GAM
VIA
William Blair Investment Management's Q1 2025 Portfolio in Review
As of Q1 2025, William Blair Investment Management held 469 positions worth $35.6B, down 13% from $40.9B the previous quarter. Its ten largest holdings account for 27% of the portfolio.
William Blair Investment Management withdrew a net $1.91B in Q1 2025, closing 46 positions and reducing 269 holdings. Its most notable exit was Penumbra, an estimated $210M position sold in full.
By sector, the portfolio is most concentrated in Technology at 33% of assets, down from 34% a quarter earlier, followed by Consumer Discretionary and Financials.
Against the trend, William Blair Investment Management opened a new position in Waystar Holding Corp worth $158M.
- William Blair Investment Management's largest Q1 2025 buy was Waystar Holding Corp: 4,227,425 shares worth $158M.
- William Blair Investment Management added most to Broadcom in Q1 2025, an estimated $515M increase.
- William Blair Investment Management's biggest Q1 2025 reduction was Advanced Micro Devices, cutting an estimated $229M.
- William Blair Investment Management fully exited Penumbra in Q1 2025, selling an estimated $210M.
- William Blair Investment Management's ten largest holdings make up 27% of its $35.6B portfolio in Q1 2025.
- William Blair Investment Management opened 36 new positions and closed 46 in Q1 2025.
- William Blair Investment Management's portfolio value fell 13% quarter-over-quarter to $35.6B.
Based on William Blair Investment Management's 13F filing for Q1 2025, filed 9 May 2025.