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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
KO icon
76
Coca-Cola
KO
$373B
$111M 0.33%
1,547,803
-18,225
-1% -$1.22M
ITW icon
77
Illinois Tool Works
ITW
$83.3B
$110M 0.33%
444,852
+18,084
+4% +$4.65M
CVX icon
78
Chevron
CVX
$386B
$110M 0.33%
656,428
+5,014
+0.8% +$785K
GEV icon
79
GE Vernova
GEV
$277B
$108M 0.33%
353,202
+222,607
+170% +$77.6M
MCD icon
80
McDonald's
MCD
$195B
$107M 0.32%
341,047
-2,684
-0.8% -$803K
IUSV icon
81
iShares Core S&P US Value ETF
IUSV
$27.8B
$105M 0.32%
1,138,197
+58,511
+5% +$5.49M
ORLY icon
82
O'Reilly Automotive
ORLY
$74.5B
$105M 0.32%
1,095,795
-13,470
-1% -$1.17M
SPGI icon
83
S&P Global
SPGI
$121B
$105M 0.32%
205,876
-613
-0.3% -$313K
IWM icon
84
iShares Russell 2000 ETF
IWM
$82.2B
$103M 0.31%
518,453
-11,355
-2% -$2.46M
QCOM icon
85
Qualcomm
QCOM
$171B
$99.8M 0.3%
649,673
+288,257
+80% +$47M
LYV icon
86
Live Nation Entertainment
LYV
$43.2B
$94.9M 0.29%
726,944
-13,485
-2% -$1.84M
XYZ
87
Block Inc
XYZ
$47B
$92.4M 0.28%
1,700,889
+226,208
+15% +$16.9M
GS icon
88
Goldman Sachs
GS
$302B
$86.5M 0.26%
158,372
+2,457
+2% +$1.48M
MRK icon
89
Merck
MRK
$328B
$84.5M 0.25%
941,399
-67,564
-7% -$6.31M
MSI icon
90
Motorola Solutions
MSI
$77.7B
$84.1M 0.25%
192,030
-11,448
-6% -$5.11M
IRTC icon
91
iRhythm Holdings
IRTC
$4.13B
$82.7M 0.25%
789,999
+185,262
+31% +$19.6M
BA icon
92
Boeing
BA
$183B
$81.5M 0.25%
477,808
+101,171
+27% +$17.5M
ALL icon
93
Allstate
ALL
$64.7B
$81.4M 0.25%
392,916
-24,532
-6% -$4.78M
RBA icon
94
RB Global
RBA
$16B
$81M 0.24%
807,433
-3,968
-0.5% -$379K
IJH icon
95
iShares Core S&P Mid-Cap ETF
IJH
$128B
$80.1M 0.24%
1,373,121
+699,041
+104% +$43.4M
ANET icon
96
Arista Networks
ANET
$265B
$80M 0.24%
1,032,020
+194,868
+23% +$19.8M
IWF icon
97
iShares Russell 1000 Growth ETF
IWF
$128B
$79.7M 0.24%
882,492
+16,072
+2% +$1.59M
PEP icon
98
PepsiCo
PEP
$189B
$79.5M 0.24%
530,285
-28,262
-5% -$4.21M
GD icon
99
General Dynamics
GD
$107B
$79.2M 0.24%
290,567
-27,707
-9% -$7.2M
ADP icon
100
Automatic Data Processing
ADP
$107B
$79.1M 0.24%
258,819
-4,478
-2% -$1.35M
2 3
4
5 6

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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.