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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
CALY
676
Callaway Golf Company
CALY
$3.14B
$2.4M 0.01%
87,390
– –
SOXX icon
677
iShares Semiconductor ETF
SOXX
$48.7B
$2.4M 0.01%
13,254
-66
-0.5% -$11.1K
OPCH icon
678
Option Care Health
OPCH
$3.56B
$2.39M 0.01%
84,090
-6,245
-7% -$164K
LPSN icon
679
LivePerson
LPSN
$32.3M
$2.38M 0.01%
4,449
-12,768
-74% -$8.86M
BWXT icon
680
BWX Technologies
BWXT
$15.6B
$2.38M 0.01%
49,761
-5,794
-10% -$303K
CLX icon
681
Clorox
CLX
$12.7B
$2.36M 0.01%
13,544
-294
-2% -$49K
EA
682
DELISTED
Electronic Arts
EA
$2.36M 0.01%
17,859
+6,189
+53% +$832K
RILY icon
683
BRC Group Holdings
RILY
$289M
$2.35M 0.01%
26,503
+5,933
+29% +$434K
CYBR
684
DELISTED
CyberArk
CYBR
$2.35M 0.01%
13,554
+171
+1% +$30K
ASTR
685
DELISTED
Astra Space, Inc. Class A Common Stock
ASTR
$2.35M 0.01%
22,563
-1,895
-8% -$260K
SPYG icon
686
State Street SPDR Portfolio S&P 500 Growth ETF
SPYG
$54.5B
$2.34M 0.01%
32,290
-399
-1% -$27.9K
XEL icon
687
Xcel Energy
XEL
$48.8B
$2.34M 0.01%
34,567
-183
-0.5% -$11.9K
LGND icon
688
Ligand Pharmaceuticals
LGND
$6.36B
$2.32M 0.01%
24,079
+167
+0.7% +$15.4K
BND icon
689
Vanguard Total Bond Market
BND
$158B
$2.32M 0.01%
27,364
+1,067
+4% +$90.9K
NEM icon
690
Newmont
NEM
$119B
$2.3M 0.01%
37,027
+2,416
+7% +$137K
LUV icon
691
Southwest Airlines
LUV
$23B
$2.29M 0.01%
53,415
-1,730
-3% -$81.2K
CGNX icon
692
Cognex
CGNX
$11.3B
$2.27M 0.01%
29,224
-14,412
-33% -$1.16M
HZNP
693
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
$2.27M 0.01%
21,056
-2,954
-12% -$322K
ED icon
694
Consolidated Edison
ED
$39.9B
$2.27M 0.01%
26,575
+95
+0.4% +$7.46K
WELL icon
695
Welltower
WELL
$171B
$2.27M 0.01%
26,414
-361
-1% -$30.1K
SPDW icon
696
State Street SPDR Portfolio Developed World ex-US ETF
SPDW
$41.6B
$2.26M 0.01%
61,971
-4,910
-7% -$181K
HCA icon
697
HCA Healthcare
HCA
$89.5B
$2.25M 0.01%
8,777
+272
+3% +$66.6K
VCSH icon
698
Vanguard Short-Term Corporate Bond ETF
VCSH
$44.7B
$2.25M 0.01%
27,646
+5,258
+23% +$430K
TIXT
699
DELISTED
TELUS International
TIXT
$2.25M 0.01%
67,897
+31,942
+89% +$1.11M
SPEM icon
700
State Street SPDR Portfolio Emerging Markets ETF
SPEM
$17.7B
$2.23M 0.01%
53,630
-2,239
-4% -$95.7K
26 27
28
29 30

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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.