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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
+14.12%
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
$29.3B
AUM Growth
+$3.27B
Cap. Flow
-$91M
Cap. Flow %
-0.31%
Top 10 Hldgs %
24.41%
Holding
1,872
New
83
Increased
624
Reduced
816
Closed
87

Top Buys

Rank Stock Value
1
GWRE icon
Guidewire Software
GWRE
+$37.5M
2
SCHW
Charles Schwab
SCHW
+$37.1M
3
VLTO icon
Veralto
VLTO
+$17.1M
4
VRTX icon
Vertex Pharmaceuticals
VRTX
+$16.7M
5
CSGP icon
CoStar Group
CSGP
+$16.3M

Top Sells

Rank Stock Value
1
DHR icon
Danaher
DHR
+$37.6M
2
IRTC icon
iRhythm Holdings
IRTC
+$26.7M
3
DE icon
Deere & Co
DE
+$22.6M
4
TOST icon
Toast
TOST
+$21.2M
5
KO icon
Coca-Cola
KO
+$20.3M

Sector Composition

Rank Sector Weight
1 Technology 26.35%
2 Healthcare 17.08%
3 Financials 12.09%
4 Industrials 11.7%
5 Consumer Discretionary 8.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CVX icon
76
Chevron
CVX
$386B
$94.9M 0.32%
636,389
-77,245
-11% -$11.7M
KO icon
77
Coca-Cola
KO
$373B
$92.6M 0.32%
1,571,263
-356,610
-18% -$20.3M
IUSV icon
78
iShares Core S&P US Value ETF
IUSV
$27.8B
$89.4M 0.3%
1,060,234
+43,920
+4% +$3.42M
ROL icon
79
Rollins
ROL
$17.6B
$88M 0.3%
2,015,208
+70,982
+4% +$2.76M
PEP icon
80
PepsiCo
PEP
$189B
$87.5M 0.3%
514,992
-4,180
-0.8% -$693K
IRTC icon
81
iRhythm Holdings
IRTC
$4.13B
$86.2M 0.29%
805,092
-306,325
-28% -$26.7M
P
82
Everpure Inc
P
$37B
$85M 0.29%
2,383,228
+4,719
+0.2% +$165K
QQQ icon
83
Invesco QQQ Trust
QQQ
$481B
$84.3M 0.29%
205,856
+6,195
+3% +$2.35M
IWM icon
84
iShares Russell 2000 ETF
IWM
$82.2B
$83.4M 0.28%
415,678
+47,531
+13% +$8.52M
SPGI icon
85
S&P Global
SPGI
$121B
$82.5M 0.28%
187,298
+3,782
+2% +$1.49M
TMO icon
86
Thermo Fisher Scientific
TMO
$223B
$81.3M 0.28%
153,216
-2,072
-1% -$1M
SPT icon
87
Sprout Social
SPT
$579M
$80.5M 0.27%
1,310,470
+76,246
+6% +$4.02M
MRK icon
88
Merck
MRK
$328B
$80.4M 0.27%
737,716
+15,121
+2% +$1.57M
PWSC
89
DELISTED
PowerSchool Holdings, Inc.
PWSC
$78.9M 0.27%
3,348,858
+37,865
+1% +$833K
TREX icon
90
Trex
TREX
$5.05B
$78.9M 0.27%
952,594
+119,622
+14% +$7.93M
VOO icon
91
Vanguard S&P 500 ETF
VOO
$1.03T
$76.6M 0.26%
175,357
+5,802
+3% +$2.38M
GD icon
92
General Dynamics
GD
$107B
$73.4M 0.25%
282,649
+26,856
+10% +$6.55M
LYV icon
93
Live Nation Entertainment
LYV
$43.2B
$72.5M 0.25%
774,577
-32,361
-4% -$2.78M
EW icon
94
Edwards Lifesciences
EW
$53.6B
$72.1M 0.25%
945,681
-59,594
-6% -$4.15M
LOW icon
95
Lowe's Companies
LOW
$121B
$67.2M 0.23%
301,787
+12,757
+4% +$2.59M
SPLK
96
DELISTED
Splunk Inc
SPLK
$67.1M 0.23%
440,503
-18,336
-4% -$2.74M
MSI icon
97
Motorola Solutions
MSI
$77.7B
$67.1M 0.23%
214,226
+3,577
+2% +$1.08M
ORLY icon
98
O'Reilly Automotive
ORLY
$74.5B
$66.7M 0.23%
1,053,330
-4,305
-0.4% -$272K
ADP icon
99
Automatic Data Processing
ADP
$107B
$65.9M 0.22%
282,997
-4,494
-2% -$1.05M
NOVT icon
100
Novanta
NOVT
$6.32B
$65.5M 0.22%
388,887
+79,926
+26% +$11.7M
2 3
4
5 6

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William Blair & Company's Q4 2023 Portfolio in Review

As of Q4 2023, William Blair & Company held 1,872 positions worth $29.3B, up 13% from $26.1B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q4 2023 filing shows 83 new, 624 increased, 816 reduced and 87 closed positions. Its largest new stake was Veralto: 229,539 shares worth $18.9M. The largest sale was Danaher, an estimated $37.6M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 25% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2023 buy was Veralto: 229,539 shares worth $18.9M.
  • William Blair & Company added most to Guidewire Software in Q4 2023, an estimated $37.5M increase.
  • William Blair & Company's biggest Q4 2023 reduction was Danaher, cutting an estimated $37.6M.
  • William Blair & Company fully exited Seagen Inc. Common Stock in Q4 2023, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.3B portfolio in Q4 2023.
  • William Blair & Company opened 83 new positions and closed 87 in Q4 2023.
  • William Blair & Company's portfolio value rose 13% quarter-over-quarter to $29.3B.

Based on William Blair & Company's 13F filing for Q4 2023, filed 12 Feb 2024.