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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
CAG icon
326
Conagra Brands
CAG
$7.18B
$8.96M 0.03%
247,020
-2,016
-0.8% -$73.1K
GDX icon
327
VanEck Gold Miners ETF
GDX
$27.8B
$8.94M 0.03%
248,265
+17,650
+8% +$659K
GSY icon
328
Invesco Ultra Short Duration ETF
GSY
$3.88B
$8.94M 0.03%
176,685
-30,230
-15% -$1.53M
ENV
329
DELISTED
ENVESTNET, INC.
ENV
$8.72M 0.03%
106,000
-9,875
-9% -$796K
GLW icon
330
Corning
GLW
$144B
$8.69M 0.03%
241,244
+466
+0.2% +$16.6K
XLK icon
331
State Street Technology Select Sector SPDR ETF
XLK
$124B
$8.68M 0.03%
133,570
+5,260
+4% +$320K
IJK icon
332
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11.2B
$8.63M 0.03%
119,478
+15,262
+15% +$1.02M
MCO icon
333
Moody's
MCO
$82.8B
$8.56M 0.03%
29,500
-8,261
-22% -$2.31M
IJR icon
334
iShares Core S&P Small-Cap ETF
IJR
$112B
$8.49M 0.03%
92,443
+19,388
+27% +$1.59M
FTSM icon
335
First Trust Enhanced Short Maturity ETF
FTSM
$6.54B
$8.46M 0.03%
140,856
+71,668
+104% +$4.3M
SRPT icon
336
Sarepta Therapeutics
SRPT
$1.94B
$8.45M 0.03%
49,564
+1,995
+4% +$296K
ONEM
337
DELISTED
1Life Healthcare
ONEM
$8.4M 0.03%
192,509
+16,454
+9% +$562K
IUSG icon
338
iShares Core S&P US Growth ETF
IUSG
$33.7B
$8.28M 0.03%
93,367
+15,481
+20% +$1.3M
ARCC icon
339
Ares Capital
ARCC
$14.3B
$8.26M 0.03%
489,100
+289,249
+145% +$4.48M
RSP icon
340
Invesco S&P 500 Equal Weight ETF
RSP
$99.5B
$8.26M 0.03%
64,722
+3,719
+6% +$442K
NSC icon
341
Norfolk Southern
NSC
$75.3B
$8.23M 0.03%
34,619
+1,999
+6% +$455K
THS
342
DELISTED
Treehouse Foods
THS
$8.21M 0.03%
193,165
+55,726
+41% +$2.27M
DFS
343
DELISTED
Discover Financial Services
DFS
$8.14M 0.03%
89,922
+10,854
+14% +$810K
KMI icon
344
Kinder Morgan
KMI
$70.7B
$8.09M 0.03%
591,618
-87,866
-13% -$1.18M
VGT icon
345
Vanguard Information Technology ETF
VGT
$149B
$8.06M 0.03%
182,368
+16,784
+10% +$690K
IJH icon
346
iShares Core S&P Mid-Cap ETF
IJH
$128B
$8.02M 0.03%
174,365
+1,685
+1% +$71K
EPAM icon
347
EPAM Systems
EPAM
$5.17B
$8M 0.03%
22,312
+169
+0.8% +$56.4K
SBAC icon
348
SBA Communications
SBAC
$19.4B
$7.99M 0.03%
28,327
+643
+2% +$189K
AMAT icon
349
Applied Materials
AMAT
$435B
$7.96M 0.03%
92,235
+1,484
+2% +$110K
SDY icon
350
State Street SPDR S&P Dividend ETF
SDY
$22.1B
$7.84M 0.03%
74,028
+2,577
+4% +$261K
12 13
14
15 16

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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.