We are live on ! Find out more
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
WAL icon
51
Western Alliance Bancorporation
WAL
$8.96B
$214M 0.52%
2,565,566
-59,433
-2% -$5.23M
FLYW icon
52
Flywire
FLYW
$2.11B
$213M 0.52%
10,332,671
-1,243,193
-11% -$24.3M
WST icon
53
West Pharmaceutical
WST
$24.9B
$210M 0.51%
640,735
+563,705
+732% +$177M
PEN icon
54
Penumbra
PEN
$12.8B
$210M 0.51%
883,098
-98,211
-10% -$22.3M
CGNX icon
55
Cognex
CGNX
$10.4B
$209M 0.51%
5,840,117
+1,253,996
+27% +$49.1M
CCJ icon
56
Cameco
CCJ
$43.3B
$209M 0.51%
4,060,351
-1,287,514
-24% -$70.1M
GTLS
57
DELISTED
Chart Industries
GTLS
$209M 0.51%
1,092,873
-240,379
-18% -$38.6M
BAM icon
58
Brookfield Asset Management
BAM
$87.2B
$204M 0.5%
+3,767,650
New +$203M
QTWO icon
59
Q2 Holdings
QTWO
$3.86B
$203M 0.5%
+2,013,368
New +$191M
MLI icon
60
Mueller Industries
MLI
$15.1B
$201M 0.49%
+5,074,996
New +$206M
CF icon
61
CF Industries
CF
$17.8B
$201M 0.49%
2,354,192
-39,497
-2% -$3.42M
PLNT icon
62
Planet Fitness
PLNT
$3.65B
$200M 0.49%
2,023,220
-220,762
-10% -$20.1M
EXAS
63
DELISTED
Exact Sciences
EXAS
$194M 0.47%
3,444,511
-840,442
-20% -$52.3M
MNST icon
64
Monster Beverage
MNST
$89.3B
$192M 0.47%
7,305,706
-1,553,490
-18% -$41.2M
BWIN
65
Baldwin Insurance Group
BWIN
$2.99B
$190M 0.46%
4,907,589
+2,197,648
+81% +$102M
POOL icon
66
Pool Corp
POOL
$7.28B
$189M 0.46%
553,461
-15,179
-3% -$5.53M
WSC icon
67
WillScot Mobile Mini Holdings
WSC
$4.08B
$186M 0.45%
5,555,481
+664,805
+14% +$24.4M
MANH icon
68
Manhattan Associates
MANH
$11.2B
$184M 0.45%
682,013
+57,586
+9% +$16.4M
TXN icon
69
Texas Instruments
TXN
$254B
$184M 0.45%
979,075
-400,384
-29% -$80M
NVT icon
70
nVent Electric
NVT
$27.9B
$177M 0.43%
2,591,405
+210,690
+9% +$15.5M
PODD icon
71
Insulet
PODD
$9.94B
$177M 0.43%
676,309
-133,214
-16% -$33.5M
IDXX icon
72
Idexx Laboratories
IDXX
$45B
$175M 0.43%
422,133
+369,471
+702% +$162M
FTAI icon
73
FTAI Aviation
FTAI
$23.6B
$174M 0.43%
+1,210,582
New +$178M
NEOG icon
74
Neogen
NEOG
$2.49B
$174M 0.43%
14,346,759
+1,074,825
+8% +$15M
DDOG icon
75
Datadog
DDOG
$87.7B
$173M 0.42%
+1,211,862
New +$166M
1 2
3
4 5

Similar funds

BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
GAM
Gotham Asset Management New York $32.7B AUM 27.65% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments) Montreal, Quebec, Canada $32.1B AUM 31.84% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
Treasurer of the State of North Carolina
Treasurer of the State of North Carolina Raleigh, North Carolina $31.8B AUM 28.93% 1-Year Est. Return

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.