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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
+9.84%
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
$31.2B
AUM Growth
+$2.49B
Cap. Flow
+$357M
Cap. Flow %
1.14%
Top 10 Hldgs %
20.4%
Holding
426
New
33
Increased
232
Reduced
127
Closed
31

Top Buys

Rank Stock Value
1
TECH icon
Bio-Techne
TECH
+$186M
2
TYL icon
Tyler Technologies
TYL
+$171M
3
NVDA icon
NVIDIA
NVDA
+$167M
4
NOW icon
ServiceNow
NOW
+$128M
5
BFAM icon
Bright Horizons
BFAM
+$109M

Top Sells

Rank Stock Value
1
PD icon
PagerDuty
PD
+$171M
2
BLDR icon
Builders FirstSource
BLDR
+$157M
3
PYPL icon
PayPal
PYPL
+$135M
4
NATI
National Instruments Corp
NATI
+$122M
5
LECO icon
Lincoln Electric
LECO
+$116M

Sector Composition

Rank Sector Weight
1 Technology 25.63%
2 Industrials 16.13%
3 Healthcare 15.71%
4 Consumer Discretionary 14.7%
5 Financials 8.24%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
SITE icon
101
SiteOne Landscape Supply
SITE
$4.32B
$92.9M 0.3%
555,324
-16,017
-3% -$2.36M
SPSC icon
102
SPS Commerce
SPSC
$2.7B
$91.9M 0.29%
+478,494
New +$77.2M
RVLV icon
103
Revolve Group
RVLV
$1.69B
$91.4M 0.29%
5,571,586
-44,654
-0.8% -$832K
VRRM icon
104
Verra Mobility
VRRM
$726M
$91.2M 0.29%
4,623,416
+99,992
+2% +$1.77M
INSM icon
105
Insmed
INSM
$29B
$90.4M 0.29%
4,285,919
+579,241
+16% +$11M
TXN icon
106
Texas Instruments
TXN
$257B
$90.2M 0.29%
501,133
+16,544
+3% +$2.85M
ARES icon
107
Ares Management
ARES
$32.3B
$90M 0.29%
933,702
-330,578
-26% -$28.6M
PODD icon
108
Insulet
PODD
$10B
$86.2M 0.28%
299,039
-181,436
-38% -$55.1M
MDB icon
109
MongoDB
MDB
$35.3B
$83.3M 0.27%
202,654
-183,289
-47% -$53.5M
CRL icon
110
Charles River Laboratories
CRL
$13.5B
$82.9M 0.27%
394,259
-301,716
-43% -$60M
VRNS icon
111
Varonis Systems
VRNS
$4.84B
$81.2M 0.26%
3,047,055
-1,679,407
-36% -$41.9M
EVH icon
112
Evolent Health
EVH
$464M
$80.9M 0.26%
+2,670,960
New +$86.4M
AIN icon
113
Albany International
AIN
$1.79B
$77.8M 0.25%
834,091
+12,584
+2% +$1.13M
SEDG icon
114
SolarEdge
SEDG
$2.05B
$75.3M 0.24%
279,825
-177,274
-39% -$50.8M
TWST icon
115
Twist Bioscience
TWST
$7.72B
$74M 0.24%
3,615,798
+1,561,277
+76% +$23.4M
MAR icon
116
Marriott International
MAR
$91.1B
$73.3M 0.24%
398,969
-197,571
-33% -$34.3M
INFY icon
117
Infosys
INFY
$51B
$69.8M 0.22%
4,345,068
-390,464
-8% -$6.1M
WH icon
118
Wyndham Hotels & Resorts
WH
$5.38B
$69.6M 0.22%
1,014,743
-340,534
-25% -$23.3M
ACVA icon
119
ACV Auctions
ACVA
$1.27B
$69.4M 0.22%
4,019,002
+111,237
+3% +$1.7M
PXD
120
DELISTED
Pioneer Natural Resource Co.
PXD
$68M 0.22%
328,261
-113,834
-26% -$24M
SNPS icon
121
Synopsys
SNPS
$78.7B
$65.2M 0.21%
149,636
+20,830
+16% +$8.39M
ABCM
122
DELISTED
Abcam PLC
ABCM
$64.1M 0.21%
2,619,936
+769,047
+42% +$13.3M
ERII icon
123
Energy Recovery
ERII
$394M
$62.2M 0.2%
2,223,891
-352,890
-14% -$8.8M
SLVM icon
124
Sylvamo
SLVM
$1.58B
$62M 0.2%
1,532,546
+172,958
+13% +$7.47M
SKY icon
125
Champion Homes
SKY
$5.11B
$61.1M 0.2%
933,935
+74,030
+9% +$5.03M
3 4
5
6 7

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William Blair Investment Management's Q2 2023 Portfolio in Review

As of Q2 2023, William Blair Investment Management held 426 positions worth $31.2B, up 8.7% from $28.7B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

William Blair Investment Management's Q2 2023 filing shows 33 new, 232 increased, 127 reduced and 31 closed positions. Its largest new stake was Bio-Techne: 2,314,458 shares worth $189M. The largest sale was PagerDuty, an estimated $171M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 25% a quarter earlier, followed by Industrials and Healthcare.

  • William Blair Investment Management's largest Q2 2023 buy was Bio-Techne: 2,314,458 shares worth $189M.
  • William Blair Investment Management added most to NVIDIA in Q2 2023, an estimated $167M increase.
  • William Blair Investment Management's biggest Q2 2023 reduction was Builders FirstSource, cutting an estimated $157M.
  • William Blair Investment Management fully exited PagerDuty in Q2 2023, selling an estimated $171M.
  • William Blair Investment Management's ten largest holdings make up 20% of its $31.2B portfolio in Q2 2023.
  • William Blair Investment Management opened 33 new positions and closed 31 in Q2 2023.
  • William Blair Investment Management's portfolio value rose 8.7% quarter-over-quarter to $31.2B.

Based on William Blair Investment Management's 13F filing for Q2 2023, filed 11 Aug 2023.