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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
+13.98%
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
$27.3B
AUM Growth
+$3.7B
Cap. Flow
+$865M
Cap. Flow %
3.17%
Top 10 Hldgs %
25.38%
Holding
1,900
New
178
Increased
749
Reduced
623
Closed
72

Top Buys

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$77.8M
2
GD icon
General Dynamics
GD
+$49.6M
3
ROK icon
Rockwell Automation
ROK
+$43.3M
4
LMBS icon
First Trust Exchange-Traded Fund IV First Trust Low Duration Opportunities ETF
LMBS
+$32.3M
5
JPM icon
JPMorgan Chase
JPM
+$30.6M

Top Sells

Rank Stock Value
1
WORK
Slack Technologies, Inc.
WORK
+$24.2M
2
NTRS icon
Northern Trust
NTRS
+$24.1M
3
BKNG icon
Booking.com
BKNG
+$22.5M
4
EXEL icon
Exelixis
EXEL
+$17.5M
5
DOCU
DocuSign
DOCU
+$15M

Sector Composition

Rank Sector Weight
1 Technology 27.82%
2 Healthcare 18.6%
3 Financials 11.15%
4 Consumer Discretionary 10.38%
5 Industrials 8.96%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FDX icon
276
FedEx
FDX
$77.3B
$11.6M 0.04%
44,858
+1,915
+4% +$530K
SHW icon
277
Sherwin-Williams
SHW
$87.4B
$11.6M 0.04%
47,355
+111
+0.2% +$26.3K
GE icon
278
GE Aerospace
GE
$379B
$11.6M 0.04%
214,589
+41,910
+24% +$1.88M
SITE icon
279
SiteOne Landscape Supply
SITE
$4.22B
$11.4M 0.04%
72,025
+2,989
+4% +$410K
EPD icon
280
Enterprise Products Partners
EPD
$81.9B
$11.3M 0.04%
574,911
-72,401
-11% -$1.35M
TSCO icon
281
Tractor Supply
TSCO
$19B
$11.2M 0.04%
398,365
-2,640
-0.7% -$73.9K
DUK icon
282
Duke Energy
DUK
$96.3B
$11.2M 0.04%
122,081
-213
-0.2% -$19.7K
UNF icon
283
Unifirst Corp
UNF
$5.24B
$11.2M 0.04%
52,708
-6,984
-12% -$1.33M
BOKF icon
284
BOK Financial
BOKF
$8.8B
$11M 0.04%
+161,028
New +$10.4M
AIRG icon
285
Airgain
AIRG
$69.3M
$10.9M 0.04%
613,765
-2,375
-0.4% -$33.1K
CRSP icon
286
CRISPR Therapeutics
CRSP
$5.22B
$10.8M 0.04%
70,835
+1,179
+2% +$139K
CDLX icon
287
Cardlytics
CDLX
$24.7M
$10.7M 0.04%
7,521
+535
+8% +$571K
VOT icon
288
Vanguard Morningstar Mid-Cap Growth ETF
VOT
$20B
$10.6M 0.04%
50,148
+84
+0.2% +$16.5K
TSM icon
289
TSMC
TSM
$2.23T
$10.6M 0.04%
97,300
-7,452
-7% -$707K
RP
290
DELISTED
RealPage, Inc.
RP
$10.5M 0.04%
120,524
-733
-0.6% -$48K
TCMD icon
291
Tactile Systems Technology
TCMD
$555M
$10.5M 0.04%
232,902
-726
-0.3% -$28.8K
AJG icon
292
Arthur J. Gallagher & Co
AJG
$65.5B
$10.4M 0.04%
83,896
+3,049
+4% +$347K
USB icon
293
US Bancorp
USB
$101B
$10.4M 0.04%
222,753
-8,991
-4% -$380K
SHY icon
294
iShares 1-3 Year Treasury Bond ETF
SHY
$25.5B
$10.4M 0.04%
119,915
+3,413
+3% +$295K
MXL icon
295
MaxLinear
MXL
$6.74B
$10.3M 0.04%
270,395
-14,750
-5% -$428K
CERN
296
DELISTED
Cerner Corp
CERN
$10.3M 0.04%
131,275
-1,021
-0.8% -$75.7K
FTNT icon
297
Fortinet
FTNT
$118B
$10.3M 0.04%
345,685
-63,910
-16% -$1.62M
LYV icon
298
Live Nation Entertainment
LYV
$43.2B
$10.2M 0.04%
139,452
+9,754
+8% +$616K
IWO icon
299
iShares Russell 2000 Growth ETF
IWO
$15B
$10.2M 0.04%
35,587
+3,765
+12% +$960K
TWOU
300
DELISTED
2U Inc
TWOU
$10.2M 0.04%
8,470
+2,794
+49% +$3M
10 11
12
13 14

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William Blair & Company's Q4 2020 Portfolio in Review

As of Q4 2020, William Blair & Company held 1,900 positions worth $27.3B, up 16% from $23.6B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company deployed $865M of net new capital in Q4 2020, opening 178 new positions and adding to 749 existing holdings. Its largest new stake was Seagen Inc. Common Stock: 91,539 shares worth $16M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Healthcare and Financials.

On the sell side, the largest reduction was Slack Technologies, Inc., an estimated $24.2M trimmed.

  • William Blair & Company's largest Q4 2020 buy was Seagen Inc. Common Stock: 91,539 shares worth $16M.
  • William Blair & Company added most to Splunk Inc in Q4 2020, an estimated $77.8M increase.
  • William Blair & Company's biggest Q4 2020 reduction was Slack Technologies, Inc., cutting an estimated $24.2M.
  • William Blair & Company fully exited Dunkin' Brands Group, Inc. in Q4 2020, selling an estimated $12.1M.
  • William Blair & Company's ten largest holdings make up 25% of its $27.3B portfolio in Q4 2020.
  • William Blair & Company opened 178 new positions and closed 72 in Q4 2020.
  • William Blair & Company's portfolio value rose 16% quarter-over-quarter to $27.3B.

Based on William Blair & Company's 13F filing for Q4 2020, filed 9 Feb 2021.