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William Blair Investment Management

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
Cap. Flow
-$1.91B
Cap. Flow %
-5.36%
Top 10 Hldgs %
26.78%
Holding
469
New
36
Increased
114
Reduced
269
Closed
46

Top Buys

Rank Stock Value
1
AVGO icon
Broadcom
AVGO
+$515M
2
SE icon
Sea Limited
SE
+$179M
3
TYL icon
Tyler Technologies
TYL
+$177M
4
WAY
Waystar Holding Corp
WAY
+$167M
5
CIEN icon
Ciena
CIEN
+$159M

Top Sells

Rank Stock Value
1
AMD icon
Advanced Micro Devices
AMD
+$229M
2
ACN icon
Accenture
ACN
+$222M
3
PEN icon
Penumbra
PEN
+$210M
4
CF icon
CF Industries
CF
+$201M
5
TXN icon
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
VRNS icon
176
Varonis Systems
VRNS
$4.82B
$36.3M 0.1%
898,497
-1,391,617
-61% -$59.9M
KRG icon
177
Kite Realty
KRG
$5.27B
$36.3M 0.1%
1,624,158
-78,118
-5% -$1.79M
SBCF icon
178
Seacoast Banking Corp of Florida
SBCF
$3.44B
$36.1M 0.1%
1,401,249
+241,067
+21% +$6.58M
ICE icon
179
Intercontinental Exchange
ICE
$85B
$35.8M 0.1%
207,412
-42,284
-17% -$6.93M
EFSC icon
180
Enterprise Financial Services Corp
EFSC
$2.41B
$35.7M 0.1%
663,646
-30,670
-4% -$1.77M
UMH
181
UMH Properties
UMH
$1.39B
$35.6M 0.1%
1,904,445
-87,975
-4% -$1.6M
LNTH icon
182
Lantheus
LNTH
$6.57B
$35.5M 0.1%
363,767
-16,557
-4% -$1.55M
INFY icon
183
Infosys
INFY
$49.7B
$35.5M 0.1%
1,943,985
+230,456
+13% +$4.78M
ANIP icon
184
ANI Pharmaceuticals
ANIP
$1.73B
$35.4M 0.1%
528,276
+43,008
+9% +$2.57M
ALHC icon
185
Alignment Healthcare
ALHC
$2.8B
$35.3M 0.1%
1,897,328
-1,075,319
-36% -$16M
HWC icon
186
Hancock Whitney
HWC
$6.34B
$35.3M 0.1%
673,097
+78,283
+13% +$4.4M
HURN icon
187
Huron Consulting
HURN
$2.39B
$35.3M 0.1%
245,846
-11,125
-4% -$1.5M
JBTM
188
JBT Marel
JBTM
$6.15B
$35.1M 0.1%
286,849
+100,897
+54% +$12.8M
TPH
189
DELISTED
Tri Pointe Homes
TPH
$34.7M 0.1%
1,088,280
-50,267
-4% -$1.72M
BANC icon
190
Banc of California
BANC
$3.1B
$34.7M 0.1%
2,443,677
-112,937
-4% -$1.71M
ESTA icon
191
Establishment Labs
ESTA
$2.25B
$34.6M 0.1%
847,389
+34,564
+4% +$1.29M
MMS icon
192
Maximus
MMS
$2.85B
$33.9M 0.1%
497,708
-20,761
-4% -$1.48M
REXR icon
193
Rexford Industrial Realty
REXR
$8.11B
$33.6M 0.09%
859,192
+166,631
+24% +$6.67M
RNST icon
194
Renasant Corp
RNST
$3.96B
$33.6M 0.09%
989,575
-45,022
-4% -$1.63M
TNET icon
195
TriNet
TNET
$3.07B
$33.5M 0.09%
422,339
+247,446
+141% +$20.5M
MUSA icon
196
Murphy USA
MUSA
$10.1B
$33.4M 0.09%
71,047
+1,245
+2% +$591K
CODI icon
197
Compass Diversified
CODI
$908M
$33.4M 0.09%
1,786,331
-80,202
-4% -$1.66M
LXP icon
198
LXP Industrial Trust
LXP
$3.58B
$33.2M 0.09%
766,739
-35,256
-4% -$1.51M
SILA
199
DELISTED
Sila Realty Trust
SILA
$33M 0.09%
1,236,831
+171,119
+16% +$4.27M
AUB icon
200
Atlantic Union Bankshares
AUB
$6.06B
$32.7M 0.09%
1,050,810
+91,348
+10% +$3.25M
6 7
8
9 10

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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.