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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
IVOL icon
1826
Quadratic Interest Rate Volatility and Inflation Hedge ETF
IVOL
$270M
– –
-226,701
Closed -$5.02M
JETS icon
1827
US Global Jets ETF
JETS
$825M
– –
-40,649
Closed -$610K
KFRC icon
1828
Kforce
KFRC
$1.03B
– –
-3,447
Closed -$202K
KWEB icon
1829
KraneShares CSI China Internet ETF
KWEB
$5.45B
– –
-1,864
Closed -$46K
LGLV icon
1830
State Street SPDR US Large Cap Low Volatility Index ETF
LGLV
$1.23B
– –
-114
Closed -$14K
LIND icon
1831
Lindblad Expeditions
LIND
$2.24B
– –
-25,600
Closed -$173K
MCY icon
1832
Mercury Insurance
MCY
$5.84B
– –
-9,173
Closed -$261K
MITK icon
1833
Mitek Systems
MITK
$838M
– –
-26,692
Closed -$244K
MSTR icon
1834
Strategy Inc
MSTR
$37.3B
– –
-10,290
Closed -$218K
NXST icon
1835
Nexstar Media Group
NXST
$5.7B
– –
-1,464
Closed -$244K
OSUR icon
1836
OraSure Technologies
OSUR
$259M
– –
-12,500
Closed -$47K
OTLK icon
1837
Outlook Therapeutics
OTLK
$206M
– –
-1,150
Closed -$28K
PENN icon
1838
PENN Entertainment
PENN
$2.57B
– –
-7,791
Closed -$214K
PRI icon
1839
Primerica
PRI
$9.57B
– –
-17,869
Closed -$2.21M
PRLB icon
1840
Protolabs
PRLB
$2.17B
– –
-5,544
Closed -$202K
PRPL icon
1841
Purple Innovation
PRPL
$28.4M
– –
-1,020
Closed -$103K
PZA icon
1842
Invesco National AMT-Free Municipal Bond ETF
PZA
$4.27B
– –
-377
Closed -$8K
QTRX icon
1843
Quanterix
QTRX
$139M
– –
-12,760
Closed -$141K
RBLX icon
1844
Roblox
RBLX
$25.4B
– –
-7,390
Closed -$265K
RCKT icon
1845
Rocket Pharmaceuticals
RCKT
$374M
– –
-11,431
Closed -$182K
REFI
1846
Chicago Atlantic Real Estate Finance
REFI
$268M
– –
-22,621
Closed -$326K
RYAAY icon
1847
Ryanair
RYAAY
$30.8B
– –
-8,995
Closed -$210K
SIMS icon
1848
State Street SPDR S&P Kensho Intelligent Structures ETF
SIMS
$8.74M
– –
-26,947
Closed -$867K
SKT icon
1849
Tanger
SKT
$4.42B
– –
-12,911
Closed -$177K
SM icon
1850
SM Energy
SM
$7.71B
– –
-5,750
Closed -$216K
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.