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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
+8.67%
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
$23B
AUM Growth
+$1.22B
Cap. Flow
-$156M
Cap. Flow %
-0.68%
Top 10 Hldgs %
22.7%
Holding
1,905
New
81
Increased
568
Reduced
855
Closed
91

Top Buys

Rank Stock Value
1
POOL icon
Pool Corp
POOL
+$43.2M
2
TEAM icon
Atlassian
TEAM
+$36.6M
3
NOVT icon
Novanta
NOVT
+$28.8M
4
PANW icon
Palo Alto Networks
PANW
+$23.2M
5
MSI icon
Motorola Solutions
MSI
+$20.1M

Top Sells

Rank Stock Value
1
ABMD
Abiomed Inc
ABMD
+$103M
2
PYPL icon
PayPal
PYPL
+$28.4M
3
DIS icon
Walt Disney
DIS
+$26.7M
4
KMX icon
CarMax
KMX
+$25.2M
5
CRM icon
Salesforce
CRM
+$24.3M

Sector Composition

Rank Sector Weight
1 Technology 22.31%
2 Healthcare 19.82%
3 Financials 12.49%
4 Industrials 11.58%
5 Consumer Discretionary 8.46%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
TDG icon
51
TransDigm Group
TDG
$68.8B
$111M 0.48%
175,604
+1,469
+0.8% +$865K
BRK.B icon
52
Berkshire Hathaway Class B
BRK.B
$1.09T
$110M 0.48%
356,957
+21,038
+6% +$6.25M
VEA icon
53
Vanguard FTSE Developed Markets ETF
VEA
$238B
$108M 0.47%
2,575,800
+454,654
+21% +$18.4M
WMT icon
54
Walmart Inc
WMT
$920B
$106M 0.46%
2,240,703
+34,380
+2% +$1.63M
AME icon
55
Ametek
AME
$59.3B
$105M 0.46%
753,604
+1,777
+0.2% +$236K
RYAN icon
56
Ryan Specialty Holdings
RYAN
$11B
$105M 0.45%
2,520,201
+246,241
+11% +$10.1M
VIG icon
57
Vanguard Dividend Appreciation ETF
VIG
$115B
$102M 0.44%
669,925
-11,197
-2% -$1.67M
ITW icon
58
Illinois Tool Works
ITW
$83.7B
$102M 0.44%
461,437
-8,559
-2% -$1.82M
AXP icon
59
American Express
AXP
$232B
$96.6M 0.42%
653,929
+39,972
+7% +$5.92M
PODD icon
60
Insulet
PODD
$10B
$95.7M 0.42%
324,947
+1,150
+0.4% +$317K
PYPL icon
61
PayPal
PYPL
$50.4B
$94.5M 0.41%
1,326,652
-354,871
-21% -$28.4M
MCD icon
62
McDonald's
MCD
$195B
$89.5M 0.39%
339,475
-3,037
-0.9% -$801K
VTV icon
63
Vanguard Morningstar Value ETF
VTV
$193B
$88.4M 0.38%
629,440
+69,613
+12% +$9.59M
TMO icon
64
Thermo Fisher Scientific
TMO
$223B
$87.4M 0.38%
158,717
-504
-0.3% -$267K
BMY icon
65
Bristol-Myers Squibb
BMY
$131B
$87.1M 0.38%
1,210,994
-64,269
-5% -$4.85M
PEP icon
66
PepsiCo
PEP
$189B
$85.8M 0.37%
475,169
-4,574
-1% -$816K
ROK icon
67
Rockwell Automation
ROK
$50.1B
$85.7M 0.37%
332,669
+50,157
+18% +$12.6M
IRTC icon
68
iRhythm Holdings
IRTC
$4.14B
$85.5M 0.37%
912,952
+89,871
+11% +$9.78M
BX icon
69
Blackstone
BX
$110B
$84.7M 0.37%
1,142,080
-33,988
-3% -$2.94M
LIN icon
70
Linde
LIN
$222B
$83.8M 0.36%
256,782
-6,927
-3% -$2.17M
EW icon
71
Edwards Lifesciences
EW
$53.7B
$82.7M 0.36%
1,107,942
-33,739
-3% -$2.6M
VEU icon
72
Vanguard FTSE All-World ex-US ETF
VEU
$70.5B
$81.1M 0.35%
1,617,469
+27,862
+2% +$1.35M
PANW icon
73
Palo Alto Networks
PANW
$315B
$80.6M 0.35%
1,155,210
+288,864
+33% +$23.2M
MRK icon
74
Merck
MRK
$330B
$77.2M 0.34%
695,597
+10,461
+2% +$1.07M
ISRG icon
75
Intuitive Surgical
ISRG
$142B
$74.6M 0.32%
281,101
-225
-0.1% -$54.9K
1 2
3
4 5

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William Blair & Company's Q4 2022 Portfolio in Review

As of Q4 2022, William Blair & Company held 1,905 positions worth $23B, up 5.6% from $21.8B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company's Q4 2022 filing shows 81 new, 568 increased, 855 reduced and 91 closed positions. Its largest new stake was Atlassian: 230,078 shares worth $29.6M. The largest sale was Abiomed Inc, an estimated $103M.

By sector, the portfolio is most concentrated in Technology at 22% of assets, down from 23% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2022 buy was Atlassian: 230,078 shares worth $29.6M.
  • William Blair & Company added most to Pool Corp in Q4 2022, an estimated $43.2M increase.
  • William Blair & Company's biggest Q4 2022 reduction was PayPal, cutting an estimated $28.4M.
  • William Blair & Company fully exited Abiomed Inc in Q4 2022, selling an estimated $103M.
  • William Blair & Company's ten largest holdings make up 23% of its $23B portfolio in Q4 2022.
  • William Blair & Company opened 81 new positions and closed 91 in Q4 2022.
  • William Blair & Company's portfolio value rose 5.6% quarter-over-quarter to $23B.

Based on William Blair & Company's 13F filing for Q4 2022, filed 10 Feb 2023.