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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
+1.99%
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
$29.4B
AUM Growth
+$519M
Cap. Flow
+$281M
Cap. Flow %
0.96%
Top 10 Hldgs %
23.58%
Holding
1,987
New
99
Increased
752
Reduced
666
Closed
108

Top Buys

Rank Stock Value
1
ABNB icon
Airbnb
ABNB
+$45.2M
2
CHWY icon
Chewy
CHWY
+$31.5M
3
U icon
Unity
U
+$23.3M
4
RYAN icon
Ryan Specialty Holdings
RYAN
+$22.4M
5
AMZN icon
Amazon
AMZN
+$21.5M

Top Sells

Rank Stock Value
1
IDXX icon
Idexx Laboratories
IDXX
+$37.7M
2
GD icon
General Dynamics
GD
+$33.5M
3
ECL icon
Ecolab
ECL
+$31.7M
4
JNJ icon
Johnson & Johnson
JNJ
+$20.9M
5
UBER icon
Uber
UBER
+$19.2M

Sector Composition

Rank Sector Weight
1 Technology 26.19%
2 Healthcare 19.81%
3 Financials 11.61%
4 Consumer Discretionary 10.68%
5 Industrials 9.37%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
IWN icon
476
iShares Russell 2000 Value ETF
IWN
$14.6B
$4.58M 0.02%
28,562
+1,213
+4% +$195K
HAL icon
477
Halliburton
HAL
$27.7B
$4.53M 0.02%
209,367
+54,350
+35% +$1.11M
WPC icon
478
W.P. Carey
WPC
$16.1B
$4.52M 0.02%
63,240
+1,305
+2% +$99.3K
LHX icon
479
L3Harris
LHX
$54.1B
$4.46M 0.02%
20,273
-124
-0.6% -$28.2K
PPG icon
480
PPG Industries
PPG
$25.5B
$4.46M 0.02%
31,181
+11,782
+61% +$1.89M
SPG icon
481
Simon Property Group
SPG
$71.4B
$4.46M 0.02%
34,304
+27,757
+424% +$3.61M
TBF icon
482
ProShares Short 20+ Year Treasury ETF
TBF
$106M
$4.45M 0.02%
266,865
-4,525
-2% -$73.7K
IWS icon
483
iShares Russell Mid-Cap Value ETF
IWS
$16B
$4.43M 0.02%
39,128
+5,111
+15% +$592K
IXUS icon
484
iShares Core MSCI Total International Stock ETF
IXUS
$60.7B
$4.42M 0.02%
62,307
-110
-0.2% -$8.02K
STIP icon
485
iShares 0-5 Year TIPS Bond ETF
STIP
$15.9B
$4.37M 0.01%
41,363
+40,068
+3,094% +$4.25M
MELI icon
486
Mercado Libre
MELI
$92.7B
$4.37M 0.01%
2,601
+14
+0.5% +$24.2K
VTWO icon
487
Vanguard Russell 2000 ETF
VTWO
$17.4B
$4.37M 0.01%
49,383
+1,025
+2% +$91.8K
COP icon
488
ConocoPhillips
COP
$153B
$4.36M 0.01%
64,294
-1,957
-3% -$113K
BJ icon
489
BJs Wholesale Club
BJ
$11.8B
$4.29M 0.01%
78,186
+41,533
+113% +$2.22M
SHY icon
490
iShares 1-3 Year Treasury Bond ETF
SHY
$25.5B
$4.28M 0.01%
49,721
-15,723
-24% -$1.36M
PRF icon
491
Invesco FTSE RAFI US 1000 ETF
PRF
$10B
$4.28M 0.01%
135,100
+6,095
+5% +$197K
PDBC icon
492
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.69B
$4.28M 0.01%
203,177
+11,691
+6% +$234K
ALTG icon
493
Alta Equipment Group
ALTG
$254M
$4.28M 0.01%
311,355
-48,208
-13% -$632K
LYFT icon
494
Lyft
LYFT
$6.28B
$4.22M 0.01%
78,792
-20,089
-20% -$1.07M
VNQI icon
495
Vanguard Global ex-US Real Estate ETF
VNQI
$3.53B
$4.19M 0.01%
74,483
-554
-0.7% -$32.5K
USPH icon
496
US Physical Therapy
USPH
$1.22B
$4.15M 0.01%
37,499
+736
+2% +$83.9K
DLR icon
497
Digital Realty Trust
DLR
$72.9B
$4.15M 0.01%
28,701
+735
+3% +$115K
PCYO icon
498
Pure Cycle
PCYO
$273M
$4.14M 0.01%
310,905
-375
-0.1% -$5.43K
ASML icon
499
ASML
ASML
$695B
$4.14M 0.01%
5,551
+312
+6% +$245K
HUBB icon
500
Hubbell
HUBB
$27.1B
$4.12M 0.01%
22,817
+201
+0.9% +$39.2K
18 19
20
21 22

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William Blair & Company's Q3 2021 Portfolio in Review

As of Q3 2021, William Blair & Company held 1,987 positions worth $29.4B, up 1.8% from $28.9B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q3 2021 filing shows 99 new, 752 increased, 666 reduced and 108 closed positions. Its largest new stake was Ryan Specialty Holdings: 709,555 shares worth $24M. The largest sale was Idexx Laboratories, an estimated $37.7M.

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 Q3 2021 buy was Ryan Specialty Holdings: 709,555 shares worth $24M.
  • William Blair & Company added most to Airbnb in Q3 2021, an estimated $45.2M increase.
  • William Blair & Company's biggest Q3 2021 reduction was Idexx Laboratories, cutting an estimated $37.7M.
  • William Blair & Company fully exited Slack Technologies, Inc. in Q3 2021, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.4B portfolio in Q3 2021.
  • William Blair & Company opened 99 new positions and closed 108 in Q3 2021.
  • William Blair & Company's portfolio value rose 1.8% quarter-over-quarter to $29.4B.

Based on William Blair & Company's 13F filing for Q3 2021, filed 12 Nov 2021.