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William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
+8.27%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$31.9B
AUM Growth
+$2.51B
Cap. Flow
+$830M
Cap. Flow %
2.6%
Top 10 Hldgs %
23.75%
Holding
2,051
New
174
Increased
889
Reduced
606
Closed
88

Top Buys

Rank Stock Value
1
AMZN icon
Amazon
AMZN
+$66.8M
2
PODD icon
Insulet
PODD
+$47M
3
XMTR icon
Xometry
XMTR
+$44.1M
4
SPY icon
State Street SPDR S&P 500 ETF Trust
SPY
+$43.7M
5
AON icon
Aon
AON
+$36.1M

Top Sells

Rank Stock Value
1
PYPL icon
PayPal
PYPL
+$73.8M
2
ATVI
Activision Blizzard
ATVI
+$46.9M
3
OSH
Oak Street Health, Inc.
OSH
+$43.6M
4
DIS icon
Walt Disney
DIS
+$34M
5
PGR icon
Progressive
PGR
+$32.6M

Sector Composition

Rank Sector Weight
1 Technology 26.2%
2 Healthcare 19.21%
3 Financials 10.7%
4 Consumer Discretionary 10.6%
5 Industrials 10.38%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
III icon
476
Information Services Group
III
$251M
$5M 0.02%
656,583
-3,955
-0.6% -$31.8K
VYMI icon
477
Vanguard International High Dividend Yield ETF
VYMI
$21.3B
$4.97M 0.02%
73,983
-178
-0.2% -$12K
RKLB icon
478
Rocket Lab Corp
RKLB
$51.8B
$4.95M 0.02%
402,842
-29,198
-7% -$401K
PRU icon
479
Prudential Financial
PRU
$41.8B
$4.92M 0.02%
45,474
+7,106
+19% +$772K
LHX icon
480
L3Harris
LHX
$53.4B
$4.89M 0.02%
22,920
+2,647
+13% +$587K
ASML icon
481
ASML
ASML
$669B
$4.82M 0.02%
6,055
+504
+9% +$400K
HPE icon
482
Hewlett Packard
HPE
$70.5B
$4.78M 0.02%
302,765
+48,490
+19% +$731K
HUBB icon
483
Hubbell
HUBB
$27.2B
$4.76M 0.01%
22,866
+49
+0.2% +$9.8K
ADPT icon
484
Adaptive Biotechnologies
ADPT
$3.97B
$4.73M 0.01%
168,636
-84,607
-33% -$2.59M
TBF icon
485
ProShares Short 20+ Year Treasury ETF
TBF
$106M
$4.72M 0.01%
295,380
+28,515
+11% +$463K
VTWO icon
486
Vanguard Russell 2000 ETF
VTWO
$17.4B
$4.71M 0.01%
52,412
+3,029
+6% +$277K
UAA icon
487
Under Armour
UAA
$2.6B
$4.7M 0.01%
221,865
+195,453
+740% +$4.44M
AIZ icon
488
Assurant
AIZ
$14.3B
$4.69M 0.01%
30,106
+10,017
+50% +$1.59M
VIS icon
489
Vanguard Industrials ETF
VIS
$8.48B
$4.68M 0.01%
23,057
+1,255
+6% +$251K
YUM icon
490
Yum! Brands
YUM
$41.1B
$4.68M 0.01%
33,681
+1,041
+3% +$133K
MPWR icon
491
Monolithic Power Systems
MPWR
$68.9B
$4.66M 0.01%
9,452
+2,469
+35% +$1.27M
LSCC icon
492
Lattice Semiconductor
LSCC
$18.5B
$4.64M 0.01%
60,190
+484
+0.8% +$35.9K
KBWB icon
493
Invesco KBW Bank ETF
KBWB
$6.73B
$4.58M 0.01%
67,527
-5,252
-7% -$368K
MLM icon
494
Martin Marietta Materials
MLM
$33B
$4.58M 0.01%
10,387
+703
+7% +$285K
XLY icon
495
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$23.8B
$4.56M 0.01%
44,578
+80
+0.2% +$7.97K
CP icon
496
Canadian Pacific Kansas City
CP
$80.5B
$4.51M 0.01%
62,763
+8,483
+16% +$620K
PCYO icon
497
Pure Cycle
PCYO
$261M
$4.5M 0.01%
307,905
-3,000
-1% -$44.9K
JAMF
498
DELISTED
Jamf
JAMF
$4.47M 0.01%
117,679
+23,446
+25% +$908K
VIGI icon
499
Vanguard International Dividend Appreciation ETF
VIGI
$9.31B
$4.46M 0.01%
52,272
+18,020
+53% +$1.6M
OBDC icon
500
Blue Owl Capital
OBDC
$5.74B
$4.43M 0.01%
313,188
+34,216
+12% +$489K
18 19
20
21 22

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William Blair & Company's Q4 2021 Portfolio in Review

As of Q4 2021, William Blair & Company held 2,051 positions worth $31.9B, up 8.5% from $29.4B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q4 2021 filing shows 174 new, 889 increased, 606 reduced and 88 closed positions. Its largest new stake was Portillo's: 759,814 shares worth $28.5M. The largest sale was PayPal, an estimated $73.8M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 26% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2021 buy was Portillo's: 759,814 shares worth $28.5M.
  • William Blair & Company added most to Amazon in Q4 2021, an estimated $66.8M increase.
  • William Blair & Company's biggest Q4 2021 reduction was PayPal, cutting an estimated $73.8M.
  • William Blair & Company fully exited Asana in Q4 2021, selling an estimated $6.06M.
  • William Blair & Company's ten largest holdings make up 24% of its $31.9B portfolio in Q4 2021.
  • William Blair & Company opened 174 new positions and closed 88 in Q4 2021.
  • William Blair & Company's portfolio value rose 8.5% quarter-over-quarter to $31.9B.

Based on William Blair & Company's 13F filing for Q4 2021, filed 14 Feb 2022.