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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
-2.74%
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
$30.1B
AUM Growth
-$1.09B
Cap. Flow
+$378M
Cap. Flow %
1.26%
Top 10 Hldgs %
21.93%
Holding
430
New
35
Increased
162
Reduced
197
Closed
32

Sector Composition

Rank Sector Weight
1 Technology 25.88%
2 Industrials 15.76%
3 Healthcare 15.67%
4 Consumer Discretionary 13.72%
5 Financials 8.88%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake
Capital Flow
ADTN icon
276
Adtran
ADTN
$665M
$19.8M 0.07%
2,405,839
+875,140
+57% +$7.78M
CAKE icon
277
Cheesecake Factory
CAKE
$5.84B
$19.6M 0.07%
646,861
+17,521
+3% +$584K
QNST icon
278
QuinStreet
QNST
$1.19B
$19.6M 0.07%
2,182,365
+61,717
+3% +$571K
COCO icon
279
Vita Coco
COCO
$3.85B
$19.6M 0.07%
751,331
-220,334
-23% -$5.88M
GOGO icon
280
Gogo Inc
GOGO
$383M
$19.5M 0.06%
1,633,863
+291,486
+22% +$4.03M
FBNC icon
281
First Bancorp
FBNC
$2.72B
$19.5M 0.06%
692,610
-55,417
-7% -$1.7M
LECO icon
282
Lincoln Electric
LECO
$15.6B
$19.4M 0.06%
106,626
+10,415
+11% +$1.99M
POWI icon
283
Power Integrations
POWI
$3.57B
$19.1M 0.06%
250,477
+50,003
+25% +$4.28M
PPBI
284
DELISTED
Pacific Premier Bancorp
PPBI
$18.9M 0.06%
869,338
-63,957
-7% -$1.47M
SFNC icon
285
Simmons First National
SFNC
$3.45B
$18.8M 0.06%
1,107,881
-321,657
-23% -$5.8M
IBP icon
286
Installed Building Products
IBP
$6.46B
$18.7M 0.06%
+149,420
New +$21.1M
PDFS icon
287
PDF Solutions
PDFS
$2.19B
$18M 0.06%
555,904
-141,321
-20% -$5.41M
FMC icon
288
FMC
FMC
$1.28B
$18M 0.06%
+268,630
New +$23.3M
EAF icon
289
GrafTech
EAF
$201M
$17.7M 0.06%
462,612
-35,674
-7% -$1.49M
IBN icon
290
ICICI Bank
IBN
$107B
$17.2M 0.06%
742,018
-20,271
-3% -$477K
CALX icon
291
Calix
CALX
$2.51B
$17.1M 0.06%
+373,712
New +$16.9M
AVTR icon
292
Avantor
AVTR
$9.42B
$16.9M 0.06%
800,481
+78,615
+11% +$1.67M
MIRM icon
293
Mirum Pharmaceuticals
MIRM
$6.04B
$16.9M 0.06%
533,693
+196,279
+58% +$5.37M
KRNT icon
294
Kornit Digital
KRNT
$817M
$16.6M 0.06%
876,238
+794,492
+972% +$19.6M
WNS
295
DELISTED
WNS Holdings
WNS
$15.7M 0.05%
+229,293
New +$15.5M
GDEN
296
DELISTED
Golden Entertainment
GDEN
$15.5M 0.05%
454,556
+13,358
+3% +$513K
KFY icon
297
Korn Ferry
KFY
$4.28B
$15.3M 0.05%
323,211
+151,379
+88% +$7.69M
PAX icon
298
Patria Investments
PAX
$1.79B
$15.3M 0.05%
1,050,037
-9,413
-0.9% -$140K
OABI icon
299
OmniAb
OABI
$497M
$14.9M 0.05%
2,862,656
+80,906
+3% +$432K
ONT
300
Onterris Inc
ONT
$576M
$14.7M 0.05%
501,633
+14,178
+3% +$539K

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William Blair Investment Management's Q3 2023 Portfolio in Review

As of Q3 2023, William Blair Investment Management held 430 positions worth $30.1B, down 3.5% from $31.2B the previous quarter. Its ten largest holdings account for 22% of the portfolio.

William Blair Investment Management's Q3 2023 filing shows 35 new, 162 increased, 197 reduced and 32 closed positions. Its largest new stake was Super Micro Computer: 5,132,780 shares worth $141M. The largest sale was Denbury Inc., an estimated $179M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Industrials and Healthcare.

  • William Blair Investment Management's largest Q3 2023 buy was Super Micro Computer: 5,132,780 shares worth $141M.
  • William Blair Investment Management added most to NVIDIA in Q3 2023, an estimated $192M increase.
  • William Blair Investment Management's biggest Q3 2023 reduction was Martin Marietta Materials, cutting an estimated $141M.
  • William Blair Investment Management fully exited Denbury Inc. in Q3 2023, selling an estimated $179M.
  • William Blair Investment Management's ten largest holdings make up 22% of its $30.1B portfolio in Q3 2023.
  • William Blair Investment Management opened 35 new positions and closed 32 in Q3 2023.
  • William Blair Investment Management's portfolio value fell 3.5% quarter-over-quarter to $30.1B.

Based on William Blair Investment Management's 13F filing for Q3 2023, filed 9 Nov 2023.