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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
CORP icon
351
PIMCO Investment Grade Corporate Bond Index Exchange-Traded Fund
CORP
$1.58B
$7.83M 0.03%
66,898
+713
+1% +$82.6K
TTWO icon
352
Take-Two Interactive
TTWO
$45.4B
$7.83M 0.03%
37,660
+1,385
+4% +$242K
XLV icon
353
State Street Health Care Select Sector SPDR ETF
XLV
$44B
$7.82M 0.03%
68,937
+13,076
+23% +$1.43M
RH icon
354
RH
RH
$3.41B
$7.82M 0.03%
17,470
-1,175
-6% -$484K
NVRO
355
DELISTED
NEVRO CORP.
NVRO
$7.68M 0.03%
44,358
+827
+2% +$134K
WY icon
356
Weyerhaeuser
WY
$17.8B
$7.68M 0.03%
228,917
+17,623
+8% +$530K
TRV icon
357
Travelers Companies
TRV
$77.2B
$7.67M 0.03%
54,607
+6,514
+14% +$837K
HMSY
358
DELISTED
HMS Holdings Corp.
HMSY
$7.64M 0.03%
207,891
+20,459
+11% +$621K
BKI
359
DELISTED
Black Knight, Inc. Common Stock
BKI
$7.64M 0.03%
86,464
-11,534
-12% -$1.05M
MO icon
360
Altria Group
MO
$107B
$7.61M 0.03%
185,634
-6,599
-3% -$265K
BWXT icon
361
BWX Technologies
BWXT
$15.8B
$7.56M 0.03%
125,361
-22,914
-15% -$1.32M
ATR icon
362
AptarGroup
ATR
$8.47B
$7.52M 0.03%
54,953
-3,522
-6% -$437K
DOV icon
363
Dover
DOV
$28B
$7.49M 0.03%
59,291
+11,246
+23% +$1.34M
FSLY icon
364
Fastly Inc
FSLY
$4.54B
$7.39M 0.03%
84,597
-9,076
-10% -$800K
SPCE icon
365
Virgin Galactic
SPCE
$500M
$7.36M 0.03%
15,516
+500
+3% +$234K
MS icon
366
Morgan Stanley
MS
$342B
$7.28M 0.03%
106,193
+8,908
+9% +$511K
FND icon
367
Floor & Decor
FND
$6.32B
$7.21M 0.03%
77,660
+3,831
+5% +$320K
PRAA icon
368
PRA Group
PRAA
$737M
$7.19M 0.03%
181,365
-4,034
-2% -$160K
SJM icon
369
J.M. Smucker
SJM
$12.7B
$7.08M 0.03%
61,201
-8,404
-12% -$977K
IWP icon
370
iShares Russell Mid-Cap Growth ETF
IWP
$21B
$7.06M 0.03%
68,744
+6,402
+10% +$609K
EOG icon
371
EOG Resources
EOG
$75.1B
$7.05M 0.03%
141,439
-23,062
-14% -$1M
CB icon
372
Chubb
CB
$132B
$7.05M 0.03%
45,825
-3,683
-7% -$516K
CPAY icon
373
Corpay
CPAY
$26.9B
$6.92M 0.03%
25,362
-659
-3% -$169K
SPSB icon
374
State Street SPDR Portfolio Short Term Corporate Bond ETF
SPSB
$10.8B
$6.9M 0.03%
219,737
+56,615
+35% +$1.78M
LFUS icon
375
Littelfuse
LFUS
$11.7B
$6.84M 0.03%
26,878
+469
+2% +$104K
13 14
15
16 17

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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.