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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
+10.03%
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
$26.1B
AUM Growth
+$841M
Cap. Flow
-$982M
Cap. Flow %
-3.76%
Top 10 Hldgs %
17.15%
Holding
419
New
32
Increased
142
Reduced
225
Closed
18

Top Buys

Rank Stock Value
1
MZTI
The Marzetti Company
MZTI
+$142M
2
AMBA icon
Ambarella
AMBA
+$92.4M
3
G icon
Genpact
G
+$92.1M
4
CMG icon
Chipotle Mexican Grill
CMG
+$83.1M
5
CG icon
Carlyle Group
CG
+$81.2M

Top Sells

Rank Stock Value
1
ABMD
Abiomed Inc
ABMD
+$241M
2
HZNP
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
+$155M
3
DEN
Denbury Inc.
DEN
+$144M
4
RBA icon
RB Global
RBA
+$101M
5
CABO icon
Cable One
CABO
+$88.8M

Sector Composition

Rank Sector Weight
1 Technology 22.72%
2 Healthcare 17.24%
3 Industrials 15.95%
4 Consumer Discretionary 14.35%
5 Financials 11.06%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LECO icon
76
Lincoln Electric
LECO
$15.6B
$118M 0.45%
817,165
+144,084
+21% +$20.2M
SBUX icon
77
Starbucks
SBUX
$123B
$115M 0.44%
1,164,081
-594,187
-34% -$56.1M
FSV icon
78
FirstService
FSV
$6.21B
$115M 0.44%
940,895
-46,461
-5% -$5.75M
HEI.A icon
79
HEICO Corp Class A
HEI.A
$37.8B
$115M 0.44%
958,279
-57,319
-6% -$7M
AMBA icon
80
Ambarella
AMBA
$3.66B
$114M 0.44%
+1,387,806
New +$92.4M
RGEN icon
81
Repligen
RGEN
$9.4B
$114M 0.44%
673,572
+126,188
+23% +$22.9M
CNI icon
82
Canadian National Railway
CNI
$76.4B
$112M 0.43%
945,375
-217,705
-19% -$26M
WSC icon
83
WillScot Mobile Mini Holdings
WSC
$4.09B
$111M 0.42%
2,457,105
+1,698,753
+224% +$76.2M
CERT icon
84
Certara
CERT
$1.22B
$108M 0.41%
6,732,603
+1,634,607
+32% +$23.7M
CGNX icon
85
Cognex
CGNX
$10.3B
$107M 0.41%
2,280,026
+201,520
+10% +$9.44M
AZTA icon
86
Azenta
AZTA
$1.46B
$106M 0.41%
1,827,418
-406,675
-18% -$20.8M
RVLV icon
87
Revolve Group
RVLV
$1.68B
$106M 0.41%
4,770,426
-229,403
-5% -$5.51M
BAP icon
88
Credicorp
BAP
$29.8B
$106M 0.41%
782,624
-127,104
-14% -$18M
ENTG icon
89
Entegris
ENTG
$24.6B
$104M 0.4%
1,592,501
-71,698
-4% -$5.28M
VEEV icon
90
Veeva Systems
VEEV
$38.7B
$101M 0.39%
625,185
+50,641
+9% +$8.65M
WMS icon
91
Advanced Drainage Systems
WMS
$10.7B
$99.1M 0.38%
1,208,764
-72,385
-6% -$7.34M
MAR icon
92
Marriott International
MAR
$92.7B
$97.6M 0.37%
655,460
-49,074
-7% -$7.56M
PXD
93
DELISTED
Pioneer Natural Resource Co.
PXD
$97.4M 0.37%
426,435
+104,843
+33% +$25.5M
ADBE icon
94
Adobe
ADBE
$102B
$96.2M 0.37%
285,890
-14,459
-5% -$4.62M
G icon
95
Genpact
G
$5.7B
$93.9M 0.36%
+2,026,123
New +$92.1M
SHLS icon
96
Shoals Technologies Group
SHLS
$1.38B
$92M 0.35%
3,729,883
-1,480,947
-28% -$35.8M
PODD icon
97
Insulet
PODD
$10B
$88.8M 0.34%
301,601
-200,951
-40% -$55.4M
INFY icon
98
Infosys
INFY
$49.5B
$86.4M 0.33%
4,797,864
-83,088
-2% -$1.55M
ISRG icon
99
Intuitive Surgical
ISRG
$142B
$85.7M 0.33%
322,894
+115,289
+56% +$28.1M
CG icon
100
Carlyle Group
CG
$17.2B
$84.9M 0.32%
+2,845,572
New +$81.2M
2 3
4
5 6

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William Blair Investment Management's Q4 2022 Portfolio in Review

As of Q4 2022, William Blair Investment Management held 419 positions worth $26.1B, up 3.3% from $25.3B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

William Blair Investment Management withdrew a net $982M in Q4 2022, closing 18 positions and reducing 225 holdings. Its most notable exit was Abiomed Inc, an estimated $241M position sold in full.

By sector, the portfolio is most concentrated in Technology at 23% of assets, up from 23% a quarter earlier, followed by Healthcare and Industrials.

Against the trend, William Blair Investment Management opened a new position in The Marzetti Company worth $148M.

  • William Blair Investment Management's largest Q4 2022 buy was The Marzetti Company: 748,865 shares worth $148M.
  • William Blair Investment Management added most to Chipotle Mexican Grill in Q4 2022, an estimated $83.1M increase.
  • William Blair Investment Management's biggest Q4 2022 reduction was Horizon Therapeutics Public Limited Company Ordinary Shares, cutting an estimated $155M.
  • William Blair Investment Management fully exited Abiomed Inc in Q4 2022, selling an estimated $241M.
  • William Blair Investment Management's ten largest holdings make up 17% of its $26.1B portfolio in Q4 2022.
  • William Blair Investment Management opened 32 new positions and closed 18 in Q4 2022.
  • William Blair Investment Management's portfolio value rose 3.3% quarter-over-quarter to $26.1B.

Based on William Blair Investment Management's 13F filing for Q4 2022, filed 9 Feb 2023.