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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
PTLO icon
226
Portillo's
PTLO
$345M
$19.2M 0.06%
1,613,012
+392,964
+32% +$5.11M
PLMR icon
227
Palomar
PLMR
$3.36B
$19M 0.06%
138,791
-3,944
-3% -$467K
FOUR icon
228
Shift4
FOUR
$3.47B
$18.9M 0.06%
231,422
+108,674
+89% +$11.2M
MKL icon
229
Markel Group
MKL
$22.8B
$18.9M 0.06%
10,083
-211
-2% -$388K
TW icon
230
Tradeweb Markets
TW
$21.9B
$18.7M 0.06%
126,251
+13,440
+12% +$1.79M
DKNG icon
231
DraftKings
DKNG
$12.7B
$18.7M 0.06%
561,854
+542,853
+2,857% +$22.3M
WST icon
232
West Pharmaceutical
WST
$24.8B
$18.5M 0.06%
82,585
-21,281
-20% -$5.87M
MS icon
233
Morgan Stanley
MS
$342B
$18.3M 0.06%
157,099
-413
-0.3% -$53.2K
IAU icon
234
iShares Gold Trust
IAU
$65.4B
$18.3M 0.06%
309,992
+6,385
+2% +$345K
SMH icon
235
VanEck Semiconductor ETF
SMH
$72B
$18.3M 0.06%
86,391
+9,030
+12% +$2.16M
XLV icon
236
State Street Health Care Select Sector SPDR ETF
XLV
$44B
$17.9M 0.05%
122,830
+1,682
+1% +$244K
CHD icon
237
Church & Dwight Co
CHD
$24B
$17.6M 0.05%
160,317
+75,873
+90% +$8.12M
PAUG icon
238
Innovator US Equity Power Buffer ETF August
PAUG
$935M
$17.4M 0.05%
460,579
-17,357
-4% -$671K
ABNB icon
239
Airbnb
ABNB
$108B
$17.3M 0.05%
144,716
-7,179
-5% -$962K
VMC icon
240
Vulcan Materials
VMC
$36.3B
$17.2M 0.05%
73,828
-1,577
-2% -$400K
IT icon
241
Gartner
IT
$11.3B
$17.2M 0.05%
40,906
-1,280
-3% -$631K
CWST icon
242
Casella Waste Systems
CWST
$5.76B
$17M 0.05%
152,021
+121,825
+403% +$13.3M
CGDV icon
243
Capital Group Dividend Value ETF
CGDV
$38.9B
$16.8M 0.05%
471,068
+30,977
+7% +$1.13M
SBAC icon
244
SBA Communications
SBAC
$19.4B
$16.5M 0.05%
74,952
-2,529
-3% -$529K
ACWX icon
245
iShares MSCI ACWI ex US ETF
ACWX
$12B
$16.4M 0.05%
296,459
+9,699
+3% +$533K
AZN icon
246
AstraZeneca
AZN
$246B
$16M 0.05%
108,877
-5,081
-4% -$735K
WCN
247
Waste Connections
WCN
$41.6B
$15.8M 0.05%
80,799
-948
-1% -$175K
TSM icon
248
TSMC
TSM
$2.23T
$15.6M 0.05%
94,011
+2,415
+3% +$469K
CB icon
249
Chubb
CB
$132B
$15.4M 0.05%
51,108
-7,058
-12% -$1.96M
PAVE icon
250
Global X US Infrastructure Development ETF
PAVE
$14.3B
$15.4M 0.05%
408,440
+7,528
+2% +$305K
8 9
10
11 12

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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.