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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
PGR icon
26
Progressive
PGR
$123B
$240M 0.82%
1,504,769
-13,592
-0.9% -$2.13M
ICE icon
27
Intercontinental Exchange
ICE
$84.2B
$238M 0.81%
1,849,768
-18,539
-1% -$2.1M
ACN icon
28
Accenture
ACN
$107B
$218M 0.74%
621,616
+2,668
+0.4% +$860K
NOW icon
29
ServiceNow
NOW
$127B
$217M 0.74%
1,534,890
-22,420
-1% -$2.83M
AON icon
30
Aon
AON
$74.8B
$216M 0.73%
741,041
+15,712
+2% +$5.03M
CRM icon
31
Salesforce
CRM
$158B
$212M 0.72%
807,322
-14,439
-2% -$3.27M
FAST icon
32
Fastenal
FAST
$59.8B
$212M 0.72%
6,551,558
-10,952
-0.2% -$330K
SBUX icon
33
Starbucks
SBUX
$122B
$212M 0.72%
2,207,095
-197,608
-8% -$19.2M
UNH icon
34
UnitedHealth
UNH
$362B
$200M 0.68%
379,302
+9,146
+2% +$4.88M
TYL icon
35
Tyler Technologies
TYL
$13B
$193M 0.66%
461,478
-6,713
-1% -$2.68M
ABT icon
36
Abbott
ABT
$189B
$192M 0.65%
1,740,207
+26,601
+2% +$2.66M
LLY icon
37
Eli Lilly
LLY
$1.07T
$190M 0.65%
325,567
-2,885
-0.9% -$1.68M
NVDA icon
38
NVIDIA
NVDA
$5.41T
$185M 0.63%
3,734,460
+121,000
+3% +$5.61M
PANW icon
39
Palo Alto Networks
PANW
$310B
$184M 0.63%
1,245,442
-3,876
-0.3% -$518K
ECL icon
40
Ecolab
ECL
$78.7B
$181M 0.62%
910,046
-37,004
-4% -$6.65M
UBER icon
41
Uber
UBER
$157B
$177M 0.6%
2,873,365
+268,445
+10% +$14M
TDG icon
42
TransDigm Group
TDG
$69B
$175M 0.6%
172,983
+477
+0.3% +$440K
IVV icon
43
iShares Core S&P 500 ETF
IVV
$904B
$168M 0.57%
351,593
-3,581
-1% -$1.6M
CTAS icon
44
Cintas
CTAS
$81.5B
$167M 0.57%
1,109,684
-7,944
-0.7% -$1.06M
ABBV icon
45
AbbVie
ABBV
$439B
$164M 0.56%
1,056,801
-13,140
-1% -$1.92M
LULU icon
46
lululemon athletica
LULU
$14B
$154M 0.52%
300,722
+10,064
+3% +$4.35M
AMT icon
47
American Tower
AMT
$79.5B
$152M 0.52%
704,192
+27,046
+4% +$5.11M
APH icon
48
Amphenol
APH
$208B
$152M 0.52%
3,064,250
-25,290
-0.8% -$1.12M
JNJ icon
49
Johnson & Johnson
JNJ
$622B
$149M 0.51%
949,000
-16,580
-2% -$2.54M
BX icon
50
Blackstone
BX
$109B
$145M 0.5%
1,109,999
+29,082
+3% +$3.15M
1
2
3 4 5

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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.