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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
SSNC icon
876
SS&C Technologies
SSNC
$19.3B
$885K ﹤0.01%
14,599
+4,107
+39% +$234K
SPCE icon
877
Virgin Galactic
SPCE
$475M
$879K ﹤0.01%
11,322
-25
-0.2% -$1.98K
EYE icon
878
National Vision
EYE
$1.51B
$877K ﹤0.01%
36,113
+5,528
+18% +$129K
PDBC icon
879
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.61B
$876K ﹤0.01%
64,397
+43,858
+214% +$610K
AIG icon
880
American International
AIG
$39.8B
$872K ﹤0.01%
15,148
+499
+3% +$26.8K
ACHC icon
881
Acadia Healthcare
ACHC
$2.82B
$871K ﹤0.01%
10,939
+1,546
+16% +$112K
LNT icon
882
Alliant Energy
LNT
$18.2B
$870K ﹤0.01%
16,576
+1,518
+10% +$81.3K
MZTI
883
The Marzetti Company
MZTI
$3.22B
$866K ﹤0.01%
4,304
+50
+1% +$10.1K
SONY icon
884
Sony
SONY
$138B
$863K ﹤0.01%
47,940
+320
+0.7% +$6K
BHC icon
885
Bausch Health
BHC
$2.37B
$862K ﹤0.01%
107,745
+20,225
+23% +$149K
BMO icon
886
Bank of Montreal
BMO
$129B
$861K ﹤0.01%
9,533
-249
-3% -$22K
URTH icon
887
iShares MSCI World ETF
URTH
$8.4B
$860K ﹤0.01%
6,910
+50
+0.7% +$6K
MTB icon
888
M&T Bank
MTB
$36.6B
$859K ﹤0.01%
6,938
+525
+8% +$63.5K
PARA
889
DELISTED
Paramount Global Class B
PARA
$859K ﹤0.01%
53,965
-1,696
-3% -$30.6K
ARKK icon
890
ARK Innovation ETF
ARKK
$6.54B
$856K ﹤0.01%
19,386
-5,579
-22% -$222K
EEMA icon
891
iShares MSCI Emerging Markets Asia ETF
EEMA
$871M
$854K ﹤0.01%
12,994
– –
HQY icon
892
HealthEquity
HQY
$8.83B
$853K ﹤0.01%
13,515
-26
-0.2% -$1.51K
AXSM icon
893
Axsome Therapeutics
AXSM
$11.2B
$853K ﹤0.01%
11,870
-1,655
-12% -$122K
LVS icon
894
Las Vegas Sands
LVS
$29.6B
$850K ﹤0.01%
14,659
+4,831
+49% +$286K
VCR icon
895
Vanguard Consumer Discretionary ETF
VCR
$6.11B
$848K ﹤0.01%
2,994
-251
-8% -$64.7K
LESL icon
896
Leslie's
LESL
$7.21M
$840K ﹤0.01%
4,471
-3,889
-47% -$803K
RAMP icon
897
LiveRamp
RAMP
$2.31B
$838K ﹤0.01%
29,352
-825
-3% -$20.5K
BFAM icon
898
Bright Horizons
BFAM
$3.85B
$837K ﹤0.01%
9,053
+6,016
+198% +$509K
AMJ
899
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
$837K ﹤0.01%
36,516
+1,303
+4% +$29.3K
SPSC icon
900
SPS Commerce
SPSC
$2.86B
$834K ﹤0.01%
4,344
+2,881
+197% +$465K
34 35
36
37 38

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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.