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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
ALGN icon
101
Align Technology
ALGN
$12.4B
$64.9M 0.22%
236,878
+45,502
+24% +$10.8M
AVGO icon
102
Broadcom
AVGO
$1.97T
$64.8M 0.22%
580,650
-7,400
-1% -$701K
NEOG icon
103
Neogen
NEOG
$2.5B
$64.8M 0.22%
3,220,866
-362,636
-10% -$6.14M
IBM icon
104
IBM
IBM
$222B
$63.6M 0.22%
388,864
+8,936
+2% +$1.35M
EFA icon
105
iShares MSCI EAFE ETF
EFA
$80.1B
$62.1M 0.21%
824,493
-10,433
-1% -$737K
NFLX icon
106
Netflix
NFLX
$309B
$61.8M 0.21%
1,269,230
+28,130
+2% +$1.23M
ABNB icon
107
Airbnb
ABNB
$108B
$61.4M 0.21%
450,650
-13,269
-3% -$1.71M
WAB icon
108
Wabtec
WAB
$50B
$61.2M 0.21%
482,048
-25,369
-5% -$2.86M
CRWD icon
109
CrowdStrike
CRWD
$226B
$58.5M 0.2%
916,988
+152,368
+20% +$7.98M
TSLA icon
110
Tesla
TSLA
$1.29T
$57.1M 0.19%
229,654
-210
-0.1% -$49.9K
IWV icon
111
iShares Russell 3000 ETF
IWV
$20.4B
$57M 0.19%
208,130
+16,316
+9% +$4.16M
BAH icon
112
Booz Allen Hamilton
BAH
$9.43B
$56.9M 0.19%
444,625
+34,399
+8% +$4.29M
FLYW icon
113
Flywire
FLYW
$2.13B
$56.9M 0.19%
2,456,337
+24,182
+1% +$610K
XOM icon
114
ExxonMobil
XOM
$657B
$56.7M 0.19%
567,057
+22,835
+4% +$2.4M
KMX icon
115
CarMax
KMX
$8.34B
$54.6M 0.19%
710,864
-230,067
-24% -$15.5M
BA icon
116
Boeing
BA
$183B
$53.9M 0.18%
206,807
-73,716
-26% -$15.8M
VUG icon
117
Vanguard Morningstar Growth ETF
VUG
$229B
$53.7M 0.18%
1,036,242
+11,772
+1% +$568K
USFR icon
118
WisdomTree Floating Rate Treasury Fund
USFR
$18.4B
$51.4M 0.18%
1,023,536
-242,632
-19% -$12.2M
RBA icon
119
RB Global
RBA
$16B
$51.4M 0.18%
768,546
+11,165
+1% +$717K
IWF icon
120
iShares Russell 1000 Growth ETF
IWF
$128B
$50.8M 0.17%
670,140
-12,872
-2% -$910K
DIS icon
121
Walt Disney
DIS
$179B
$49.9M 0.17%
552,131
+973
+0.2% +$85.8K
ANET icon
122
Arista Networks
ANET
$264B
$49.8M 0.17%
845,880
-5,728
-0.7% -$301K
RMD icon
123
ResMed
RMD
$32.7B
$49.2M 0.17%
286,299
-36,509
-11% -$5.61M
GWW icon
124
W.W. Grainger
GWW
$61.6B
$49M 0.17%
59,170
-300
-0.5% -$231K
VTI icon
125
Vanguard Morningstar Total Stock Market ETF
VTI
$691B
$48.9M 0.17%
205,957
+5,196
+3% +$1.15M
3 4
5
6 7

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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.