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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
ZG icon
1526
Zillow
ZG
$7.53B
$100K ﹤0.01%
+736
New +$83K
EWG icon
1527
iShares MSCI Germany ETF
EWG
$1.67B
$99K ﹤0.01%
3,114
-8,715
-74% -$262K
IYE icon
1528
iShares US Energy ETF
IYE
$1.8B
$99K ﹤0.01%
4,908
-2,866
-37% -$52.6K
IOO icon
1529
iShares Global 100 ETF
IOO
$9.43B
$98K ﹤0.01%
1,565
-407
-21% -$24.2K
QLTA icon
1530
iShares AAA-A Rated Corporate Bond ETF
QLTA
$1.21B
$97K ﹤0.01%
1,657
– –
MRO
1531
DELISTED
Marathon Oil Corporation
MRO
$97K ﹤0.01%
14,614
-20,224
-58% -$109K
SPHD icon
1532
Invesco S&P 500 High Dividend Low Volatility ETF
SPHD
$3.39B
$95K ﹤0.01%
2,518
-10,946
-81% -$392K
PFXF icon
1533
VanEck Preferred Securities ex Financials ETF
PFXF
$2.47B
$94K ﹤0.01%
4,565
+1,365
+43% +$27.2K
SRLN icon
1534
State Street Blackstone Senior Loan ETF
SRLN
$5.37B
$94K ﹤0.01%
2,062
– –
INTF icon
1535
iShares International Equity Factor ETF
INTF
$3.75B
$92K ﹤0.01%
3,380
+3,125
+1,225% +$80.2K
SWN
1536
DELISTED
Southwestern Energy Company
SWN
$92K ﹤0.01%
31,035
+2,000
+7% +$5.89K
PGF icon
1537
Invesco Financial Preferred ETF
PGF
$668M
$88K ﹤0.01%
4,590
-210
-4% -$3.99K
IVOO icon
1538
Vanguard S&P Mid-Cap 400 ETF
IVOO
$3.93B
$86K ﹤0.01%
1,102
– –
VVNT.WS
1539
DELISTED
Vivint Smart Home, Inc. Warrants, each exercisable for one Class A Common Stock at an exercise price
VVNT.WS
$86K ﹤0.01%
9,417
-179,013
-95% -$1.53M
CGW icon
1540
Invesco S&P Global Water Index ETF
CGW
$1.07B
$84K ﹤0.01%
1,794
+22
+1% +$984
SPAB icon
1541
State Street SPDR Portfolio Aggregate Bond ETF
SPAB
$9.93B
$84K ﹤0.01%
2,722
-42
-2% -$1.29K
AWRE icon
1542
Aware
AWRE
$26M
$83K ﹤0.01%
23,664
+10,664
+82% +$31.7K
MGC icon
1543
Vanguard Morningstar Mega Cap ETF
MGC
$10.4B
$83K ﹤0.01%
619
– –
NCNA
1544
NuCana
NCNA
$5.95M
$83K ﹤0.01%
4
-3
-43% -$72.1K
IFLN
1545
Invesco Bloomberg Enhanced Fallen Angels ETF
IFLN
$306M
$83K ﹤0.01%
4,278
– –
COHR icon
1546
Coherent
COHR
$69.6B
$82K ﹤0.01%
1,081
+799
+283% +$47.3K
CRIS icon
1547
Curis
CRIS
$3.49M
$82K ﹤0.01%
+25
New +$30K
JNK icon
1548
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$77K ﹤0.01%
706
-28
-4% -$2.98K
FCG icon
1549
First Trust Natural Gas ETF
FCG
$645M
$76K ﹤0.01%
8,573
+173
+2% +$1.32K
ITEQ icon
1550
Amplify BlueStar Israel Technology ETF
ITEQ
$118M
$76K ﹤0.01%
1,100
-100
-8% -$6.12K
60 61
62
63 64

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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.