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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
-1.82%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
AUM
$33.2B
AUM Growth
-$1.22B
Cap. Flow
+$11.1M
Cap. Flow %
0.03%
Top 10 Hldgs %
23.77%
Holding
1,895
New
82
Increased
626
Reduced
808
Closed
94

Top Buys

Rank Stock Value
1
META icon
Meta Platforms (Facebook)
META
+$112M
2
AAON icon
Aaon
AAON
+$104M
3
GEV icon
GE Vernova
GEV
+$77.6M
4
QCOM icon
Qualcomm
QCOM
+$47M
5
WM icon
Waste Management
WM
+$44.3M

Top Sells

Rank Stock Value
1
INTU icon
Intuit
INTU
+$65.9M
2
POOL icon
Pool Corp
POOL
+$64.7M
3
DHR icon
Danaher
DHR
+$59.8M
4
ZTS icon
Zoetis
ZTS
+$57.9M
5
SCHW
Charles Schwab
SCHW
+$44.5M

Sector Composition

Rank Sector Weight
1 Technology 26.23%
2 Financials 14.3%
3 Healthcare 12.58%
4 Industrials 12.51%
5 Consumer Discretionary 7.94%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MDB icon
101
MongoDB
MDB
$35.2B
$78.4M 0.24%
447,025
+76,568
+21% +$18.7M
BWXT icon
102
BWX Technologies
BWXT
$15.8B
$77.2M 0.23%
782,991
+358,170
+84% +$38.9M
LOW icon
103
Lowe's Companies
LOW
$121B
$75.1M 0.23%
321,867
+1,092
+0.3% +$269K
ROK icon
104
Rockwell Automation
ROK
$50.1B
$74.8M 0.23%
289,366
-21,560
-7% -$6M
VTI icon
105
Vanguard Morningstar Total Stock Market ETF
VTI
$691B
$72.7M 0.22%
264,407
+98
+0% +$28.5K
VUG icon
106
Vanguard Morningstar Growth ETF
VUG
$229B
$71M 0.21%
1,149,210
+510
+0% +$34.4K
WM icon
107
Waste Management
WM
$90.5B
$70.3M 0.21%
303,773
+199,949
+193% +$44.3M
TMO icon
108
Thermo Fisher Scientific
TMO
$223B
$70.1M 0.21%
140,810
-4,056
-3% -$2.2M
ORCL icon
109
Oracle
ORCL
$442B
$69.9M 0.21%
499,767
-122,092
-20% -$19.9M
CYBR
110
DELISTED
CyberArk
CYBR
$69.2M 0.21%
204,708
+37,506
+22% +$13.5M
PCOR icon
111
Procore
PCOR
$8.81B
$68.6M 0.21%
1,038,635
+237,851
+30% +$17.9M
CWAN
112
DELISTED
Clearwater Analytics
CWAN
$67.9M 0.2%
2,534,270
+779,538
+44% +$21.9M
RBC icon
113
RBC Bearings
RBC
$17.6B
$67.7M 0.2%
210,485
+24,885
+13% +$8.39M
SCHW
114
Charles Schwab
SCHW
$189B
$67.6M 0.2%
863,837
-566,974
-40% -$44.5M
WAB icon
115
Wabtec
WAB
$49.9B
$67.6M 0.2%
372,638
-31,280
-8% -$6M
RSP icon
116
Invesco S&P 500 Equal Weight ETF
RSP
$99.5B
$66.3M 0.2%
382,792
+15,700
+4% +$2.79M
TSLA icon
117
Tesla
TSLA
$1.29T
$66.3M 0.2%
255,678
-18,476
-7% -$6.16M
EFA icon
118
iShares MSCI EAFE ETF
EFA
$80.2B
$65.7M 0.2%
804,334
-20,171
-2% -$1.63M
IWV icon
119
iShares Russell 3000 ETF
IWV
$20.4B
$63.3M 0.19%
199,363
-181
-0.1% -$60.7K
BLK icon
120
Blackrock
BLK
$180B
$62.3M 0.19%
65,808
+13,185
+25% +$12.9M
HEI icon
121
HEICO Corp
HEI
$52.1B
$61.4M 0.19%
229,954
+33,059
+17% +$8.05M
GNRC icon
122
Generac Holdings
GNRC
$13.1B
$60.7M 0.18%
479,565
-33,884
-7% -$4.86M
HON icon
123
Honeywell
HON
$74.6B
$60.7M 0.18%
303,949
-4,058
-1% -$821K
ITOT icon
124
iShares Core S&P Total US Stock Market ETF
ITOT
$97.8B
$58.9M 0.18%
482,572
+2,448
+0.5% +$316K
DE icon
125
Deere & Co
DE
$167B
$58.2M 0.18%
124,090
+681
+0.6% +$319K
3 4
5
6 7

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William Blair & Company's Q1 2025 Portfolio in Review

As of Q1 2025, William Blair & Company held 1,895 positions worth $33.2B, down 3.6% from $34.4B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q1 2025 filing shows 82 new, 626 increased, 808 reduced and 94 closed positions. Its largest new stake was CCC Intelligent Solutions: 320,989 shares worth $2.9M. The largest sale was Intuit, an estimated $65.9M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Financials and Healthcare.

  • William Blair & Company's largest Q1 2025 buy was CCC Intelligent Solutions: 320,989 shares worth $2.9M.
  • William Blair & Company added most to Meta Platforms (Facebook) in Q1 2025, an estimated $112M increase.
  • William Blair & Company's biggest Q1 2025 reduction was Intuit, cutting an estimated $65.9M.
  • William Blair & Company fully exited Smartsheet Inc. in Q1 2025, selling an estimated $3.52M.
  • William Blair & Company's ten largest holdings make up 24% of its $33.2B portfolio in Q1 2025.
  • William Blair & Company opened 82 new positions and closed 94 in Q1 2025.
  • William Blair & Company's portfolio value fell 3.6% quarter-over-quarter to $33.2B.

Based on William Blair & Company's 13F filing for Q1 2025, filed 9 May 2025.