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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
U icon
201
Unity
U
$19.6B
$30.1M 0.12%
1,052,540
+50,686
+5% +$1.59M
LNTH icon
202
Lantheus
LNTH
$6.57B
$30M 0.11%
587,743
-10,585
-2% -$653K
CENTA icon
203
Central Garden & Pet Co Class A
CENTA
$2.43B
$29.9M 0.11%
1,043,985
+179,270
+21% +$5.39M
EWBC icon
204
East-West Bancorp
EWBC
$18.5B
$29.9M 0.11%
453,487
+27,331
+6% +$1.87M
ABCM
205
DELISTED
Abcam PLC
ABCM
$29.7M 0.11%
+1,909,540
New +$29.8M
LZB icon
206
La-Z-Boy
LZB
$1.64B
$29.7M 0.11%
1,301,457
-53,936
-4% -$1.31M
PEB icon
207
Pebblebrook Hotel Trust
PEB
$2.04B
$29.2M 0.11%
2,182,401
-23,504
-1% -$359K
ACVA icon
208
ACV Auctions
ACVA
$1.32B
$29M 0.11%
3,528,610
+213,406
+6% +$1.78M
NXGN
209
DELISTED
NextGen Healthcare, Inc. Common Stock
NXGN
$28.9M 0.11%
1,539,549
-57,487
-4% -$1.11M
ONT
210
Onterris Inc
ONT
$576M
$28.9M 0.11%
650,070
+3,690
+0.6% +$156K
PPBI
211
DELISTED
Pacific Premier Bancorp
PPBI
$28.8M 0.11%
911,991
-34,989
-4% -$1.2M
SP
212
DELISTED
SP Plus Corporation
SP
$28.8M 0.11%
828,763
-31,222
-4% -$1.08M
AWI icon
213
Armstrong World Industries
AWI
$7.75B
$28.7M 0.11%
418,244
-15,973
-4% -$1.21M
ADNT icon
214
Adient
ADNT
$1.44B
$28.3M 0.11%
814,468
-32,324
-4% -$1.13M
WGO icon
215
Winnebago Industries
WGO
$915M
$28.2M 0.11%
535,087
-20,306
-4% -$1.15M
VBTX
216
DELISTED
Veritex Holdings
VBTX
$28.2M 0.11%
1,003,091
+58,080
+6% +$1.73M
ASR icon
217
Grupo Aeroportuario del Sureste
ASR
$8.24B
$27.9M 0.11%
119,848
-4,066
-3% -$945K
CNDT icon
218
Conduent
CNDT
$241M
$27.8M 0.11%
6,863,525
+472,471
+7% +$1.81M
DCO icon
219
Ducommun
DCO
$3.04B
$27.7M 0.11%
554,348
+3,994
+0.7% +$190K
PGTI
220
DELISTED
PGT, Inc.
PGTI
$27.5M 0.11%
1,529,913
-60,551
-4% -$1.23M
CNOB icon
221
Center Bancorp
CNOB
$1.81B
$27.2M 0.1%
1,124,321
-43,139
-4% -$1.06M
ESRT icon
222
Empire State Realty Trust
ESRT
$817M
$27.1M 0.1%
4,026,726
+324,339
+9% +$2.29M
AUDC icon
223
AudioCodes
AUDC
$249M
$26.9M 0.1%
1,501,519
+93,981
+7% +$1.81M
CODI icon
224
Compass Diversified
CODI
$908M
$26.8M 0.1%
1,469,334
-60,918
-4% -$1.14M
AAMI
225
Acadian Asset Management
AAMI
$3.27B
$26.6M 0.1%
1,293,870
-48,930
-4% -$924K
7 8
9
10 11

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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.