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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
FINX icon
901
Global X FinTech ETF
FINX
$173M
$1.05M ﹤0.01%
21,825
+3,641
+20% +$178K
SUMO
902
DELISTED
Sumo Logic, Inc. Common Stock
SUMO
$1.04M ﹤0.01%
64,590
+408
+0.6% +$8.11K
STIM icon
903
Neuronetics
STIM
$211M
$1.04M ﹤0.01%
158,519
+3,162
+2% +$30.3K
VIXY icon
904
ProShares VIX Short-Term Futures ETF
VIXY
$190M
$1.04M ﹤0.01%
+2,281
New +$1.05M
PSLV icon
905
Sprott Physical Silver Trust
PSLV
$13.3B
$1.04M ﹤0.01%
135,225
-118,916
-47% -$1.01M
ZS icon
906
Zscaler
ZS
$30.4B
$1.04M ﹤0.01%
3,963
+450
+13% +$113K
MPC icon
907
Marathon Petroleum
MPC
$100B
$1.04M ﹤0.01%
16,773
+962
+6% +$55.3K
REGN icon
908
Regeneron Pharmaceuticals
REGN
$83B
$1.04M ﹤0.01%
1,714
-128
-7% -$79.5K
ESGV icon
909
Vanguard ESG US Stock ETF
ESGV
$13.7B
$1.03M ﹤0.01%
12,907
+1
+0% +$82
DDOG icon
910
Datadog
DDOG
$90.6B
$1.03M ﹤0.01%
7,291
-42
-0.6% -$5.3K
XIFR
911
XPLR Infrastructure LP
XIFR
$1.09B
$1.02M ﹤0.01%
13,589
+1,952
+17% +$152K
ENTG icon
912
Entegris
ENTG
$25B
$1.02M ﹤0.01%
8,081
+2,622
+48% +$316K
SWKS icon
913
Skyworks Solutions
SWKS
$10.5B
$1.01M ﹤0.01%
6,163
+74
+1% +$13.5K
SLCA
914
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
$1.01M ﹤0.01%
126,498
+14,650
+13% +$139K
FTEC icon
915
Fidelity MSCI Information Technology Index ETF
FTEC
$21.6B
$1.01M ﹤0.01%
+8,500
New +$1.04M
KRE icon
916
State Street SPDR S&P Regional Banking ETF
KRE
$4.67B
$1.01M ﹤0.01%
14,877
+2,965
+25% +$191K
DRI icon
917
Darden Restaurants
DRI
$25.4B
$1.01M ﹤0.01%
6,645
+654
+11% +$96.1K
OGN icon
918
Organon & Co
OGN
$3.6B
$1M ﹤0.01%
30,582
-16,251
-35% -$520K
BLND icon
919
Blend Labs
BLND
$367M
$996K ﹤0.01%
+73,861
New +$1.25M
DGRS icon
920
WisdomTree Trust WisdomTree US SmallCap Quality Dividend Growth Fund
DGRS
$415M
$994K ﹤0.01%
22,411
+1,001
+5% +$45.4K
PSCE icon
921
Invesco S&P SmallCap Energy ETF
PSCE
$104M
$994K ﹤0.01%
26,078
+12,570
+93% +$429K
VV icon
922
Vanguard Morningstar Large-Cap ETF
VV
$54.9B
$992K ﹤0.01%
4,939
-7,307
-60% -$1.51M
NDAQ icon
923
Nasdaq
NDAQ
$54.6B
$989K ﹤0.01%
15,369
+567
+4% +$35.7K
GRMN
924
Garmin
GRMN
$60.2B
$987K ﹤0.01%
6,346
+731
+13% +$119K
NTR icon
925
Nutrien
NTR
$32.2B
$984K ﹤0.01%
15,171
-250
-2% -$15.3K
35 36
37
38 39

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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.