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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
ANET icon
151
Arista Networks
ANET
$261B
$34.3M 0.13%
846,728
+22,536
+3% +$871K
MRVL icon
152
Marvell Technology
MRVL
$198B
$33.9M 0.12%
567,914
-15,414
-3% -$749K
IWD icon
153
iShares Russell 1000 Value ETF
IWD
$83.9B
$32.9M 0.12%
208,428
-5,839
-3% -$893K
MDY icon
154
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27.2B
$32.5M 0.12%
67,774
-5,422
-7% -$2.47M
RTX icon
155
RTX Corp
RTX
$298B
$31.8M 0.12%
324,372
+11,814
+4% +$1.16M
IT icon
156
Gartner
IT
$11.5B
$31.7M 0.12%
90,588
-1,104
-1% -$359K
CVS icon
157
CVS Health
CVS
$120B
$31.7M 0.12%
458,870
-50,430
-10% -$3.59M
DVAX
158
DELISTED
Dynavax Technologies
DVAX
$31.7M 0.12%
2,455,132
-74,687
-3% -$851K
PXD
159
DELISTED
Pioneer Natural Resource Co.
PXD
$31.4M 0.11%
151,443
+3,925
+3% +$826K
FTV icon
160
Fortive
FTV
$18.5B
$30.7M 0.11%
545,664
-2,526
-0.5% -$128K
SYY icon
161
Sysco
SYY
$40.6B
$30.6M 0.11%
412,148
+9,641
+2% +$713K
CAT icon
162
Caterpillar
CAT
$397B
$30.6M 0.11%
124,252
-226
-0.2% -$50.4K
HEI icon
163
HEICO Corp
HEI
$51.5B
$29.9M 0.11%
169,175
-1,490
-0.9% -$251K
IEFA icon
164
iShares Core MSCI EAFE ETF
IEFA
$196B
$29.9M 0.11%
442,905
+28,156
+7% +$1.91M
HOLX
165
DELISTED
Hologic
HOLX
$29.8M 0.11%
368,135
-9,842
-3% -$804K
ALL icon
166
Allstate
ALL
$65.4B
$29.4M 0.11%
269,691
+227,880
+545% +$25.8M
ZBRA icon
167
Zebra Technologies
ZBRA
$17.9B
$27.9M 0.1%
94,377
-12,963
-12% -$3.64M
IRDM icon
168
Iridium Communications
IRDM
$5.25B
$27.6M 0.1%
443,647
+6,317
+1% +$391K
BRK.A icon
169
Berkshire Hathaway Class A
BRK.A
$1.09T
$26.9M 0.1%
52
– –
PCTY icon
170
Paylocity
PCTY
$7.68B
$26.6M 0.1%
144,290
-1,259
-0.9% -$230K
GLD icon
171
SPDR Gold Trust
GLD
$144B
$26.2M 0.1%
147,033
+11,083
+8% +$2.04M
DVY icon
172
iShares Select Dividend ETF
DVY
$23.7B
$26.2M 0.1%
230,869
-21,523
-9% -$2.45M
WEX icon
173
WEX
WEX
$6.44B
$25.8M 0.09%
141,792
-2,803
-2% -$496K
CCOI icon
174
Cogent Communications
CCOI
$549M
$25.7M 0.09%
381,460
-42,782
-10% -$2.79M
AMD icon
175
Advanced Micro Devices
AMD
$795B
$25.6M 0.09%
224,859
+1,806
+0.8% +$188K
5 6
7
8 9

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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.