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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
SPMB icon
1851
State Street SPDR Portfolio Mortgage Backed Bond ETF
SPMB
$7.05B
– –
-1,423
Closed -$31K
TDTT icon
1852
FlexShares iBoxx 3-Year Target Duration TIPS Index Fund
TDTT
$2.53B
– –
-144
Closed -$3K
THD icon
1853
iShares MSCI Thailand ETF
THD
$355M
– –
-3
Closed –
TOVX icon
1854
Theriva Biologics
TOVX
$11M
– –
-1,268
Closed -$31K
WLKP icon
1855
Westlake Chemical Partners
WLKP
$778M
– –
-9,700
Closed -$209K
NARI
1856
DELISTED
Inari Medical, Inc. Common Stock
NARI
– –
-3,130
Closed -$227K
TELL
1857
DELISTED
Tellurian Inc.
TELL
– –
-12,789
Closed -$31K
SIX
1858
DELISTED
Six Flags Entertainment Corp.
SIX
– –
-14,767
Closed -$261K
DMTK
1859
DELISTED
DermTech, Inc. Common Stock
DMTK
– –
-33,717
Closed -$134K
CURO
1860
DELISTED
CURO Group Holdings Corp.
CURO
– –
-29,743
Closed -$119K
SIEN
1861
DELISTED
Sientra, Inc.
SIEN
– –
-2,675
Closed -$17K
VVNT
1862
DELISTED
Vivint Smart Home, Inc. Class A Common Stock
VVNT
– –
-24,020
Closed -$158K
NFTZ
1863
DELISTED
Defiance Digital Revolution ETF
NFTZ
– –
-65
Closed –
EAR
1864
DELISTED
Eargo, Inc. Common Stock
EAR
– –
-3,062
Closed -$64K
RSX
1865
DELISTED
VanEck Russia ETF
RSX
– –
-11,915
Closed -$67K
SWIR
1866
DELISTED
Sierra Wireless
SWIR
– –
-119,210
Closed -$3.63M
MNRL
1867
DELISTED
Brigham Minerals, Inc. Class A Common Stock
MNRL
– –
-125,757
Closed -$3.1M
ABMD
1868
DELISTED
Abiomed Inc
ABMD
– –
-420,582
Closed -$103M
COLIW
1869
DELISTED
Colicity Inc. Warrant
COLIW
– –
-165,150
Closed -$8K
COLI
1870
DELISTED
Colicity Inc. Class A Common Stock
COLI
– –
-195,638
Closed -$1.92M
BTRS
1871
DELISTED
BTRS Holdings Inc. Class 1 Common Stock
BTRS
– –
-13,366
Closed -$124K
SWCH
1872
DELISTED
Switch, Inc. Class A Common Stock
SWCH
– –
-364,953
Closed -$12.3M
CLR
1873
DELISTED
CONTINENTAL RESOURCES INC.
CLR
– –
-16,921
Closed -$1.13M
ECOM
1874
DELISTED
CHANNELADVISOR CORPORATION
ECOM
– –
-58,567
Closed -$1.33M
STZ.B
1875
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
– –
-75
Closed -$22K
72 73 74
75
76

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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.