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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
ONC
1376
BeOne Medicines Ltd
ONC
$40.5B
$223K ﹤0.01%
862
-43
-5% -$11.8K
AIN icon
1377
Albany International
AIN
$1.81B
$222K ﹤0.01%
+3,030
New +$191K
HBI
1378
DELISTED
Hanesbrands
HBI
$222K ﹤0.01%
15,202
+156
+1% +$2.35K
RLI icon
1379
RLI Corp
RLI
$5.81B
$222K ﹤0.01%
+4,272
New +$205K
VRRM icon
1380
Verra Mobility
VRRM
$712M
$222K ﹤0.01%
16,548
+1,145
+7% +$13.5K
PBCT
1381
DELISTED
People's United Financial Inc
PBCT
$222K ﹤0.01%
17,145
-2,272
-12% -$27.3K
XLRN
1382
DELISTED
Acceleron Pharma
XLRN
$222K ﹤0.01%
+1,735
New +$203K
IDU icon
1383
iShares US Utilities ETF
IDU
$1.38B
$221K ﹤0.01%
2,850
– –
HBT icon
1384
HBT Financial
HBT
$1.34B
$220K ﹤0.01%
14,500
– –
DWM icon
1385
WisdomTree International Equity Fund
DWM
$695M
$219K ﹤0.01%
4,316
+67
+2% +$3.21K
GRFS
1386
Grifois
GRFS
$5.4B
$219K ﹤0.01%
11,874
-13
-0.1% -$241
OGS icon
1387
ONE Gas
OGS
$5.12B
$219K ﹤0.01%
2,852
-456
-14% -$34.5K
TRS icon
1388
TriMas Corp
TRS
$1.4B
$219K ﹤0.01%
+6,909
New +$189K
VG
1389
DELISTED
Vonage Holdings Corporation
VG
$219K ﹤0.01%
17,000
– –
CERT icon
1390
Certara
CERT
$1.21B
$217K ﹤0.01%
+6,423
New +$235K
DDG
1391
DELISTED
Proshares Short Oil & Gas
DDG
$217K ﹤0.01%
8,520
– –
ACWX icon
1392
iShares MSCI ACWI ex US ETF
ACWX
$12B
$215K ﹤0.01%
4,046
-444
-10% -$22K
VYX icon
1393
NCR Voyix
VYX
$1.13B
$215K ﹤0.01%
+9,320
New +$154K
BIO icon
1394
Bio-Rad Laboratories Class A
BIO
$9.66B
$214K ﹤0.01%
+367
New +$209K
CNK icon
1395
Cinemark Holdings
CNK
$4.37B
$214K ﹤0.01%
+12,287
New +$154K
FPE icon
1396
First Trust Preferred Securities and Income ETF
FPE
$6.34B
$213K ﹤0.01%
+10,543
New +$208K
ASB icon
1397
Associated Banc-Corp
ASB
$6.08B
$212K ﹤0.01%
12,434
-3,450
-22% -$52.4K
CHPT icon
1398
ChargePoint
CHPT
$162M
$212K ﹤0.01%
+265
New +$133K
CNS icon
1399
Cohen & Steers
CNS
$4.37B
$212K ﹤0.01%
+2,848
New +$188K
LRGF icon
1400
iShares US Equity Factor ETF
LRGF
$3.73B
$212K ﹤0.01%
5,635
+3,450
+158% +$123K
54 55
56
57 58

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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.