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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
-1.82%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
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
MSFT icon
1
Microsoft
MSFT
$2.93T
$1.41B 4.26%
3,766,202
-45,568
-1% -$18.6M
AAPL icon
2
Apple
AAPL
$4.99T
$1.37B 4.14%
6,174,270
-102,935
-2% -$23.8M
AMZN icon
3
Amazon
AMZN
$2.46T
$1.17B 3.53%
6,150,856
-12,488
-0.2% -$2.71M
V icon
4
Visa
V
$707B
$714M 2.15%
2,036,756
-52,970
-3% -$17.9M
NVDA icon
5
NVIDIA
NVDA
$4.67T
$583M 1.76%
5,380,574
+339,691
+7% +$43.1M
JPM icon
6
JPMorgan Chase
JPM
$931B
$569M 1.72%
2,319,136
-65,475
-3% -$16.7M
MA icon
7
Mastercard
MA
$501B
$559M 1.69%
1,020,695
-18,996
-2% -$10.3M
COST icon
8
Costco
COST
$431B
$519M 1.57%
548,899
-39,157
-7% -$38.2M
GOOG icon
9
Alphabet (Google) Class C
GOOG
$4.07T
$502M 1.52%
3,215,678
-37,973
-1% -$6.95M
SPY icon
10
State Street SPDR S&P 500 ETF Trust
SPY
$777B
$478M 1.44%
854,383
+34,691
+4% +$20.4M
IDXX icon
11
Idexx Laboratories
IDXX
$44.8B
$458M 1.38%
1,090,770
-14,244
-1% -$6.18M
FISV
12
Fiserv Inc
FISV
$29.5B
$439M 1.33%
1,990,011
-84,191
-4% -$18.4M
PGR icon
13
Progressive
PGR
$129B
$431M 1.3%
1,523,058
-63,160
-4% -$16.5M
WSO icon
14
Watsco Inc
WSO
$13B
$414M 1.25%
814,712
+43,776
+6% +$21.6M
GOOGL icon
15
Alphabet (Google) Class A
GOOGL
$4.09T
$400M 1.21%
2,584,203
-6,883
-0.3% -$1.25M
SYK icon
16
Stryker
SYK
$134B
$345M 1.04%
926,375
-5,299
-0.6% -$2.02M
META icon
17
Meta Platforms (Facebook)
META
$1.5T
$318M 0.96%
551,158
+173,886
+46% +$112M
ZTS icon
18
Zoetis
ZTS
$32.9B
$312M 0.94%
1,892,280
-347,906
-16% -$57.9M
UBER icon
19
Uber
UBER
$142B
$310M 0.93%
4,248,809
+226,234
+6% +$16.3M
ICE icon
20
Intercontinental Exchange
ICE
$87.1B
$306M 0.92%
1,774,295
-24,766
-1% -$4.06M
VEEV icon
21
Veeva Systems
VEEV
$33.8B
$301M 0.91%
1,298,921
+82,690
+7% +$18.9M
DHR icon
22
Danaher
DHR
$141B
$296M 0.89%
1,443,780
-274,101
-16% -$59.8M
CPRT icon
23
Copart
CPRT
$28.9B
$292M 0.88%
5,152,588
-22,865
-0.4% -$1.29M
HD icon
24
Home Depot
HD
$339B
$279M 0.84%
761,909
+6,268
+0.8% +$2.44M
LLY icon
25
Eli Lilly
LLY
$1.09T
$274M 0.83%
331,821
-2,540
-0.8% -$2.11M
1
2 3 4 5

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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.