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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
+5.41%
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
$40.9B
AUM Growth
+$405M
Cap. Flow
-$285M
Cap. Flow %
-0.7%
Top 10 Hldgs %
27.41%
Holding
463
New
51
Increased
220
Reduced
159
Closed
30

Top Buys

Rank Stock Value
1
PRMB
Primo Brands
PRMB
+$331M
2
YUMC icon
Yum China
YUMC
+$240M
3
TLN
Talen Energy Corp
TLN
+$232M
4
MLI icon
Mueller Industries
MLI
+$206M
5
BAM icon
Brookfield Asset Management
BAM
+$203M

Top Sells

Rank Stock Value
1
ISRG icon
Intuitive Surgical
ISRG
+$315M
2
ICLR icon
Icon
ICLR
+$294M
3
ZTS icon
Zoetis
ZTS
+$230M
4
BWXT icon
BWX Technologies
BWXT
+$222M
5
PRMW
Primo Water Corporation
PRMW
+$197M

Sector Composition

Rank Sector Weight
1 Technology 34.12%
2 Consumer Discretionary 14.8%
3 Financials 12.22%
4 Healthcare 11.93%
5 Industrials 10.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
BBY icon
376
Best Buy
BBY
$17.5B
$918K ﹤0.01%
10,696
-90
-0.8% -$8.21K
HASI icon
377
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$5.37B
$825K ﹤0.01%
30,756
+5,046
+20% +$158K
FERG icon
378
Ferguson
FERG
$47.4B
$819K ﹤0.01%
4,709
-1,368
-23% -$272K
DAR icon
379
Darling Ingredients
DAR
$10B
$689K ﹤0.01%
20,444
+6,934
+51% +$262K
POWI icon
380
Power Integrations
POWI
$3.57B
$629K ﹤0.01%
10,188
-80
-0.8% -$5.09K
CCK icon
381
Crown Holdings
CCK
$13.1B
$562K ﹤0.01%
6,792
-1,909,238
-100% -$174M
EFA icon
382
iShares MSCI EAFE ETF
EFA
$80.2B
$532K ﹤0.01%
7,037
+6,676
+1,849% +$529K
G icon
383
Genpact
G
$5.7B
$517K ﹤0.01%
12,044
+2
+0% +$84
USFD icon
384
US Foods
USFD
$24B
$508K ﹤0.01%
7,531
+3
+0% +$197
GPN icon
385
Global Payments
GPN
$23.4B
$494K ﹤0.01%
4,404
+3
+0.1% +$328
REG icon
386
Regency Centers
REG
$13.9B
$489K ﹤0.01%
6,618
+8
+0.1% +$585
TAP icon
387
Molson Coors Class B
TAP
$7.75B
$485K ﹤0.01%
8,468
+5
+0.1% +$292
NI icon
388
NiSource
NI
$20.1B
$485K ﹤0.01%
13,202
-530
-4% -$19K
ICLR icon
389
Icon
ICLR
$12.9B
$484K ﹤0.01%
2,306
-1,257,039
-100% -$294M
TFX icon
390
Teleflex
TFX
$6.03B
$472K ﹤0.01%
2,654
+456
+21% +$93.6K
DOX icon
391
Amdocs
DOX
$6.08B
$471K ﹤0.01%
5,531
+4
+0.1% +$351
LH icon
392
Labcorp
LH
$26.2B
$470K ﹤0.01%
2,051
– –
JBHT icon
393
JB Hunt Transport Services
JBHT
$25.9B
$468K ﹤0.01%
2,742
+2
+0.1% +$357
DOC icon
394
Healthpeak Properties
DOC
$14.2B
$467K ﹤0.01%
23,030
+2,027
+10% +$43.9K
AXTA icon
395
Axalta
AXTA
$7.98B
$460K ﹤0.01%
13,455
-325
-2% -$12.2K
JBL icon
396
Jabil
JBL
$38.4B
$456K ﹤0.01%
3,169
-576
-15% -$75.6K
LKQ icon
397
LKQ Corp
LKQ
$6.25B
$449K ﹤0.01%
12,231
+1,915
+19% +$73.2K
KNX icon
398
Knight Transportation
KNX
$11.6B
$449K ﹤0.01%
8,473
+5
+0.1% +$272
WEX icon
399
WEX
WEX
$6.48B
$442K ﹤0.01%
2,520
+1
+0% +$188
BERY
400
DELISTED
Berry Global Group, Inc.
BERY
$418K ﹤0.01%
6,467
-795,415
-99% -$52.5M
14 15
16
17 18

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William Blair Investment Management's Q4 2024 Portfolio in Review

As of Q4 2024, William Blair Investment Management held 463 positions worth $40.9B, up 1% from $40.5B the previous quarter. Its ten largest holdings account for 27% of the portfolio.

William Blair Investment Management's Q4 2024 filing shows 51 new, 220 increased, 159 reduced and 30 closed positions. Its largest new stake was Primo Brands: 11,161,870 shares worth $343M. The largest sale was Intuitive Surgical, an estimated $315M.

By sector, the portfolio is most concentrated in Technology at 34% of assets, down from 34% a quarter earlier, followed by Consumer Discretionary and Financials.

  • William Blair Investment Management's largest Q4 2024 buy was Primo Brands: 11,161,870 shares worth $343M.
  • William Blair Investment Management added most to West Pharmaceutical in Q4 2024, an estimated $177M increase.
  • William Blair Investment Management's biggest Q4 2024 reduction was Intuitive Surgical, cutting an estimated $315M.
  • William Blair Investment Management fully exited Primo Water Corporation in Q4 2024, selling an estimated $197M.
  • William Blair Investment Management's ten largest holdings make up 27% of its $40.9B portfolio in Q4 2024.
  • William Blair Investment Management opened 51 new positions and closed 30 in Q4 2024.
  • William Blair Investment Management's portfolio value rose 1% quarter-over-quarter to $40.9B.

Based on William Blair Investment Management's 13F filing for Q4 2024, filed 10 Feb 2025.