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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
LEN icon
651
Lennar Class A
LEN
$21B
$1.85M 0.01%
21,134
-88
-0.4% -$7.13K
SMWB icon
652
Similarweb
SMWB
$768M
$1.84M 0.01%
286,465
-83,001
-22% -$475K
FBT icon
653
First Trust NYSE Arca Biotechnology Index Fund
FBT
$2.79B
$1.83M 0.01%
11,890
+11,426
+2,463% +$1.69M
HTGC icon
654
Hercules Capital
HTGC
$3.14B
$1.83M 0.01%
138,342
-1,950
-1% -$26.5K
ALTG icon
655
Alta Equipment Group
ALTG
$246M
$1.82M 0.01%
138,289
– –
MOAT icon
656
VanEck Morningstar Wide Moat ETF
MOAT
$12.4B
$1.82M 0.01%
27,996
+1,089
+4% +$70.6K
LESL icon
657
Leslie's
LESL
$6.93M
$1.82M 0.01%
7,438
-78
-1% -$21.7K
HURN icon
658
Huron Consulting
HURN
$2.39B
$1.81M 0.01%
24,949
-1,155
-4% -$84.9K
INSP icon
659
Inspire Medical Systems
INSP
$1.66B
$1.81M 0.01%
7,182
+858
+14% +$183K
HCP
660
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
$1.8M 0.01%
65,978
-2,451
-4% -$69.4K
TWST icon
661
Twist Bioscience
TWST
$7.76B
$1.79M 0.01%
75,096
+67,335
+868% +$1.95M
DDOG icon
662
Datadog
DDOG
$89.2B
$1.79M 0.01%
24,315
-1,221
-5% -$95.4K
SHY icon
663
iShares 1-3 Year Treasury Bond ETF
SHY
$25.5B
$1.78M 0.01%
21,949
-2,129
-9% -$173K
IPG
664
DELISTED
Interpublic Group of Companies
IPG
$1.78M 0.01%
53,418
-4,465
-8% -$138K
CNNE icon
665
Cannae Holdings
CNNE
$670M
$1.75M 0.01%
84,905
-1,200
-1% -$26.2K
PARA
666
DELISTED
Paramount Global Class B
PARA
$1.73M 0.01%
59,030
-1,218
-2% -$22.4K
SCHB icon
667
Schwab US Broad Market ETF
SCHB
$45.1B
$1.73M 0.01%
115,704
-7,092
-6% -$107K
REGN icon
668
Regeneron Pharmaceuticals
REGN
$83.8B
$1.72M 0.01%
2,381
+1,133
+91% +$836K
OSH
669
DELISTED
Oak Street Health, Inc.
OSH
$1.71M 0.01%
79,555
-67,117
-46% -$1.4M
PFF icon
670
iShares Preferred and Income Securities ETF
PFF
$13.3B
$1.71M 0.01%
56,015
-4,969
-8% -$155K
IMGN
671
DELISTED
Immunogen Inc
IMGN
$1.71M 0.01%
344,595
+77,750
+29% +$422K
IZRL icon
672
ARK Israel Innovative Technology ETF
IZRL
$140M
$1.71M 0.01%
97,490
+1,000
+1% +$17.6K
KEYS icon
673
Keysight
KEYS
$60.9B
$1.71M 0.01%
9,976
+303
+3% +$51.7K
RBC icon
674
RBC Bearings
RBC
$17.5B
$1.71M 0.01%
8,149
+5,516
+209% +$1.26M
MAIN icon
675
Main Street Capital
MAIN
$5.51B
$1.69M 0.01%
45,634
– –
25 26
27
28 29

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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.