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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
PFFD icon
226
Global X US Preferred ETF
PFFD
$2.17B
$19.9M 0.07%
771,324
+503,838
+188% +$13.1M
SCHW
227
Charles Schwab
SCHW
$189B
$19.6M 0.07%
269,683
+31,149
+13% +$2.22M
SGEN
228
DELISTED
Seagen Inc. Common Stock
SGEN
$19.2M 0.07%
112,797
+26,223
+30% +$4.08M
EEM icon
229
iShares MSCI Emerging Markets ETF
EEM
$30.4B
$18.9M 0.06%
374,448
-101,990
-21% -$5.31M
GSY icon
230
Invesco Ultra Short Duration ETF
GSY
$3.88B
$18.7M 0.06%
370,968
+222,702
+150% +$11.2M
ONT
231
Onterris Inc
ONT
$576M
$18.6M 0.06%
301,192
+27,905
+10% +$1.46M
IRT icon
232
Independence Realty Trust
IRT
$3.96B
$18.6M 0.06%
913,423
-4,106
-0.4% -$81.6K
TWOU
233
DELISTED
2U Inc
TWOU
$18.6M 0.06%
18,456
+6,307
+52% +$7.39M
TECH icon
234
Bio-Techne
TECH
$11.3B
$18.5M 0.06%
152,692
-776
-0.5% -$94.4K
VO icon
235
Vanguard Morningstar Mid-Cap ETF
VO
$110B
$18.5M 0.06%
311,996
+1,092
+0.4% +$66K
APD icon
236
Air Products & Chemicals
APD
$67.7B
$18.5M 0.06%
72,093
+1,531
+2% +$423K
GE icon
237
GE Aerospace
GE
$379B
$18.5M 0.06%
287,541
+7,749
+3% +$498K
C icon
238
Citigroup
C
$231B
$18.2M 0.06%
259,641
+24,008
+10% +$1.68M
ILMN icon
239
Illumina
ILMN
$29.1B
$18.2M 0.06%
46,179
+223
+0.5% +$103K
TROW icon
240
T. Rowe Price
TROW
$23.8B
$18.1M 0.06%
92,180
+284
+0.3% +$59.8K
ORCL icon
241
Oracle
ORCL
$442B
$18.1M 0.06%
207,360
-7,217
-3% -$637K
RDFN
242
DELISTED
Redfin
RDFN
$17.7M 0.06%
353,967
-117
-0% -$6.33K
NEO icon
243
NeoGenomics
NEO
$2.11B
$17.4M 0.06%
361,172
+14,616
+4% +$677K
BRK.A icon
244
Berkshire Hathaway Class A
BRK.A
$1.09T
$17.3M 0.06%
42
-13
-24% -$5.49M
EVBG
245
DELISTED
Everbridge, Inc. Common Stock
EVBG
$17.3M 0.06%
114,308
+6,805
+6% +$1.01M
DVY icon
246
iShares Select Dividend ETF
DVY
$23.7B
$17.2M 0.06%
149,909
+3,545
+2% +$414K
AMGN icon
247
Amgen
AMGN
$225B
$17.1M 0.06%
80,308
+4,963
+7% +$1.14M
SHAK icon
248
Shake Shack
SHAK
$2.94B
$17M 0.06%
216,221
+11,007
+5% +$1M
OMC icon
249
Omnicom Group
OMC
$23.5B
$16.9M 0.06%
233,872
-1,083
-0.5% -$80.5K
QNST icon
250
QuinStreet
QNST
$1.19B
$16.9M 0.06%
963,551
+21,729
+2% +$391K
8 9
10
11 12

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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.