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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+9.7%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$27.3B
AUM Growth
+$2.26B
Cap. Flow
+$202M
Cap. Flow %
0.74%
Top 10 Hldgs %
24.36%
Holding
1,897
New
97
Increased
682
Reduced
737
Closed
88

Top Buys

Rank Stock Value
1
COST icon
Costco
COST
+$28.3M
2
ALL icon
Allstate
ALL
+$25.8M
3
ISRG icon
Intuitive Surgical
ISRG
+$19.6M
4
NEOG icon
Neogen
NEOG
+$17.4M
5
DV icon
DoubleVerify
DV
+$17.3M

Top Sells

Rank Stock Value
1
NBIX icon
Neurocrine Biosciences
NBIX
+$29.1M
2
PLNT icon
Planet Fitness
PLNT
+$20.4M
3
ABNB icon
Airbnb
ABNB
+$17.1M
4
IBM icon
IBM
IBM
+$14.8M
5
XMTR icon
Xometry
XMTR
+$10.8M

Sector Composition

Rank Sector Weight
1 Technology 25.59%
2 Healthcare 18.44%
3 Industrials 11.64%
4 Financials 11.51%
5 Consumer Discretionary 8.51%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MCHP icon
76
Microchip Technology
MCHP
$43.6B
$94.1M 0.34%
1,049,936
+14,466
+1% +$1.14M
VRSK icon
77
Verisk Analytics
VRSK
$23.6B
$93M 0.34%
411,642
+11,061
+3% +$2.32M
P
78
Everpure Inc
P
$36.1B
$85.9M 0.31%
2,332,584
+142,657
+7% +$4.04M
MRK icon
79
Merck
MRK
$330B
$82.9M 0.3%
718,307
+16,435
+2% +$1.87M
ROL icon
80
Rollins
ROL
$17.6B
$80.7M 0.3%
1,885,095
+4,108
+0.2% +$167K
TMO icon
81
Thermo Fisher Scientific
TMO
$223B
$79.7M 0.29%
152,805
-4,929
-3% -$2.66M
IUSV icon
82
iShares Core S&P US Value ETF
IUSV
$27.8B
$79.6M 0.29%
1,017,198
+7,644
+0.8% +$571K
KMX icon
83
CarMax
KMX
$8.21B
$79.1M 0.29%
944,854
+67,847
+8% +$4.97M
RMD icon
84
ResMed
RMD
$32.6B
$76.1M 0.28%
348,198
+9,869
+3% +$2.2M
BMY icon
85
Bristol-Myers Squibb
BMY
$130B
$75.9M 0.28%
1,187,113
-31,934
-3% -$2.14M
EVH icon
86
Evolent Health
EVH
$492M
$74.3M 0.27%
2,451,123
+102,540
+4% +$3.32M
LYV icon
87
Live Nation Entertainment
LYV
$43B
$73.8M 0.27%
810,391
-102,244
-11% -$7.98M
NEOG icon
88
Neogen
NEOG
$2.49B
$73.2M 0.27%
3,366,083
+961,806
+40% +$17.4M
QQQ icon
89
Invesco QQQ Trust
QQQ
$481B
$72.8M 0.27%
197,167
-184
-0.1% -$61.9K
META icon
90
Meta Platforms (Facebook)
META
$1.48T
$72.8M 0.27%
253,640
+11,106
+5% +$2.74M
SPGI icon
91
S&P Global
SPGI
$120B
$71.6M 0.26%
178,517
-1,745
-1% -$638K
GWRE icon
92
Guidewire Software
GWRE
$14.4B
$71.5M 0.26%
939,219
-70,767
-7% -$5.42M
FLYW icon
93
Flywire
FLYW
$2.1B
$70.3M 0.26%
2,264,864
+21,981
+1% +$659K
ORLY icon
94
O'Reilly Automotive
ORLY
$74.4B
$69M 0.25%
1,084,200
-35,400
-3% -$2.16M
VOO icon
95
Vanguard S&P 500 ETF
VOO
$1.03T
$65.8M 0.24%
161,556
+22,410
+16% +$8.65M
ALGN icon
96
Align Technology
ALGN
$12.2B
$65M 0.24%
183,735
+8,255
+5% +$2.63M
EFA icon
97
iShares MSCI EAFE ETF
EFA
$80.2B
$64.4M 0.24%
888,673
-12,226
-1% -$888K
IWM icon
98
iShares Russell 2000 ETF
IWM
$82.1B
$63.2M 0.23%
337,718
+35,057
+12% +$6.25M
USFR icon
99
WisdomTree Floating Rate Treasury Fund
USFR
$18.4B
$63.1M 0.23%
1,254,902
-54,274
-4% -$2.73M
ADP icon
100
Automatic Data Processing
ADP
$107B
$63M 0.23%
286,751
-3,397
-1% -$732K
2 3
4
5 6

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William Blair & Company's Q2 2023 Portfolio in Review

As of Q2 2023, William Blair & Company held 1,897 positions worth $27.3B, up 9% from $25B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q2 2023 filing shows 97 new, 682 increased, 737 reduced and 88 closed positions. Its largest new stake was Innovator US Equity Power Buffer ETF April: 112,249 shares worth $3.47M. The largest sale was Neurocrine Biosciences, an estimated $29.1M.

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

  • William Blair & Company's largest Q2 2023 buy was Innovator US Equity Power Buffer ETF April: 112,249 shares worth $3.47M.
  • William Blair & Company added most to Costco in Q2 2023, an estimated $28.3M increase.
  • William Blair & Company's biggest Q2 2023 reduction was Neurocrine Biosciences, cutting an estimated $29.1M.
  • William Blair & Company fully exited ABB Ltd in Q2 2023, selling an estimated $7.21M.
  • William Blair & Company's ten largest holdings make up 24% of its $27.3B portfolio in Q2 2023.
  • William Blair & Company opened 97 new positions and closed 88 in Q2 2023.
  • William Blair & Company's portfolio value rose 9% quarter-over-quarter to $27.3B.

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