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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
AMLP icon
451
Alerian MLP ETF
AMLP
$13.1B
$4.97M 0.02%
126,648
+34,976
+38% +$1.36M
CACC icon
452
Credit Acceptance
CACC
$6.05B
$4.94M 0.02%
9,726
– –
IWP icon
453
iShares Russell Mid-Cap Growth ETF
IWP
$21.1B
$4.92M 0.02%
50,933
+829
+2% +$75.5K
SPG icon
454
Simon Property Group
SPG
$71.7B
$4.92M 0.02%
42,591
-9,069
-18% -$988K
VTWO icon
455
Vanguard Russell 2000 ETF
VTWO
$17.5B
$4.87M 0.02%
64,446
+888
+1% +$64K
INDA icon
456
iShares MSCI India ETF
INDA
$6.58B
$4.87M 0.02%
111,462
+1,304
+1% +$54K
SUB icon
457
iShares Short-Term National Muni Bond ETF
SUB
$11.4B
$4.86M 0.02%
46,668
-7,865
-14% -$819K
MTN icon
458
Vail Resorts
MTN
$5.18B
$4.85M 0.02%
19,264
-7,832
-29% -$1.91M
IHI icon
459
iShares US Medical Devices ETF
IHI
$3.48B
$4.83M 0.02%
85,593
+530
+0.6% +$29.2K
IMGN
460
DELISTED
Immunogen Inc
IMGN
$4.83M 0.02%
256,005
-323,590
-56% -$3.82M
ENB icon
461
Enbridge
ENB
$112B
$4.81M 0.02%
129,507
-7,535
-5% -$287K
MRVI icon
462
Maravai LifeSciences
MRVI
$861M
$4.78M 0.02%
384,892
-219,152
-36% -$2.96M
ETR icon
463
Entergy
ETR
$49.9B
$4.72M 0.02%
96,944
+844
+0.9% +$43.7K
VLO icon
464
Valero Energy
VLO
$98.7B
$4.71M 0.02%
40,169
+1,867
+5% +$217K
RF icon
465
Regions Financial
RF
$27B
$4.71M 0.02%
264,403
+6,192
+2% +$109K
AIRG icon
466
Airgain
AIRG
$67.7M
$4.7M 0.02%
870,209
-1,968
-0.2% -$11K
HACK icon
467
Amplify Cybersecurity ETF
HACK
$3.08B
$4.61M 0.02%
91,085
-1,055
-1% -$50.3K
DHI icon
468
D.R. Horton
DHI
$41.9B
$4.56M 0.02%
37,439
+5,800
+18% +$634K
AMRC icon
469
Ameresco
AMRC
$1.47B
$4.51M 0.02%
92,833
-17,734
-16% -$799K
GPN icon
470
Global Payments
GPN
$25.1B
$4.5M 0.02%
45,651
-53,384
-54% -$5.49M
SNOW icon
471
Snowflake
SNOW
$117B
$4.49M 0.02%
25,498
+519
+2% +$84.4K
MLM icon
472
Martin Marietta Materials
MLM
$32.7B
$4.47M 0.02%
9,692
+182
+2% +$71.8K
SU icon
473
Suncor Energy
SU
$76.5B
$4.43M 0.02%
151,237
+27,363
+22% +$818K
SHY icon
474
iShares 1-3 Year Treasury Bond ETF
SHY
$25.5B
$4.41M 0.02%
54,415
-1,218
-2% -$99.6K
MXL icon
475
MaxLinear
MXL
$6.95B
$4.37M 0.02%
138,426
-225
-0.2% -$6.5K
17 18
19
20 21

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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.