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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
SHEL icon
501
Shell
SHEL
$247B
$4.68M 0.01%
63,809
-986
-2% -$66.4K
DHI icon
502
D.R. Horton
DHI
$41.6B
$4.67M 0.01%
36,740
-42
-0.1% -$5.63K
MLM icon
503
Martin Marietta Materials
MLM
$32.9B
$4.65M 0.01%
9,720
-625
-6% -$317K
IGSB icon
504
iShares 1-5 Year Investment Grade Corporate Bond ETF
IGSB
$23.4B
$4.63M 0.01%
88,437
+10,040
+13% +$522K
VHT icon
505
Vanguard Health Care ETF
VHT
$19.1B
$4.63M 0.01%
17,472
-1,122
-6% -$299K
FICO icon
506
Fair Isaac
FICO
$22.9B
$4.61M 0.01%
2,501
-338
-12% -$626K
HDV
507
iShares Core High Dividend ETF
HDV
$15.1B
$4.6M 0.01%
189,870
-3,575
-2% -$83.6K
GKOS icon
508
Glaukos
GKOS
$11B
$4.6M 0.01%
46,732
-672
-1% -$89.6K
VICI icon
509
VICI Properties
VICI
$29B
$4.6M 0.01%
140,885
-7,054
-5% -$217K
EWJ icon
510
iShares MSCI Japan ETF
EWJ
$23.2B
$4.57M 0.01%
66,699
+36,702
+122% +$2.52M
MSTR icon
511
Strategy Inc
MSTR
$38.2B
$4.57M 0.01%
15,851
+693
+5% +$220K
HLNE icon
512
Hamilton Lane
HLNE
$5.76B
$4.55M 0.01%
30,574
-4,855
-14% -$740K
RH icon
513
RH
RH
$3.45B
$4.54M 0.01%
19,363
+3,349
+21% +$1.16M
VIS icon
514
Vanguard Industrials ETF
VIS
$8.47B
$4.51M 0.01%
18,229
-4,194
-19% -$1.09M
URI icon
515
United Rentals
URI
$69.5B
$4.51M 0.01%
7,191
-1,271
-15% -$874K
CNI icon
516
Canadian National Railway
CNI
$77.2B
$4.47M 0.01%
45,904
-3,010
-6% -$304K
HYG icon
517
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$4.44M 0.01%
56,268
+4,387
+8% +$348K
HOLX
518
DELISTED
Hologic
HOLX
$4.44M 0.01%
71,819
-69,468
-49% -$4.6M
TTE icon
519
TotalEnergies
TTE
$192B
$4.38M 0.01%
67,715
-2,741
-4% -$165K
SLB icon
520
SLB Ltd
SLB
$77.6B
$4.37M 0.01%
104,430
+55,988
+116% +$2.29M
QNST icon
521
QuinStreet
QNST
$1.2B
$4.35M 0.01%
243,675
-206,224
-46% -$4.32M
QYLD icon
522
Global X NASDAQ-100 Covered Call ETF
QYLD
$8.29B
$4.35M 0.01%
261,400
+94,488
+57% +$1.7M
PGX icon
523
Invesco Preferred ETF
PGX
$3.77B
$4.31M 0.01%
384,558
+323
+0.1% +$3.74K
IYW icon
524
iShares US Technology ETF
IYW
$25.8B
$4.31M 0.01%
30,708
+1,233
+4% +$192K
ICLR icon
525
Icon
ICLR
$12.8B
$4.27M 0.01%
24,378
-3,696
-13% -$717K
19 20
21
22 23

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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.