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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
GDXJ icon
576
VanEck Junior Gold Miners ETF
GDXJ
$8.27B
$2.65M 0.01%
48,847
+19,505
+66% +$1.06M
AMP icon
577
Ameriprise Financial
AMP
$49.8B
$2.64M 0.01%
13,595
-2,263
-14% -$405K
CARR icon
578
Carrier Global
CARR
$52.2B
$2.63M 0.01%
69,850
+12,780
+22% +$463K
SCZ icon
579
iShares MSCI EAFE Small-Cap ETF
SCZ
$13.6B
$2.63M 0.01%
38,456
+11,939
+45% +$753K
ESGU icon
580
iShares ESG Aware MSCI USA ETF
ESGU
$18.4B
$2.62M 0.01%
30,482
+2,750
+10% +$223K
TCF
581
DELISTED
TCF Financial Corporation Common Stock
TCF
$2.61M 0.01%
70,593
-10,555
-13% -$335K
VERU icon
582
Veru
VERU
$45.5M
$2.59M 0.01%
29,993
+17,230
+135% +$713K
MAR icon
583
Marriott International
MAR
$92.7B
$2.57M 0.01%
19,475
+3,770
+24% +$431K
HAL icon
584
Halliburton
HAL
$27.5B
$2.56M 0.01%
135,692
+2,019
+2% +$31.3K
MNDT
585
DELISTED
Mandiant, Inc. Common Stock
MNDT
$2.55M 0.01%
110,756
+29,025
+36% +$447K
WAB icon
586
Wabtec
WAB
$49.7B
$2.54M 0.01%
34,693
-5,077
-13% -$347K
FBC
587
DELISTED
Flagstar Bancorp, Inc. New
FBC
$2.5M 0.01%
61,400
-34
-0.1% -$1.17K
CPB icon
588
Campbell Soup
CPB
$6.94B
$2.5M 0.01%
51,710
+16,942
+49% +$819K
VIS icon
589
Vanguard Industrials ETF
VIS
$8.47B
$2.5M 0.01%
14,686
+6,531
+80% +$1.05M
CSX icon
590
CSX Corp
CSX
$93.3B
$2.48M 0.01%
81,891
-7,266
-8% -$209K
GKOS icon
591
Glaukos
GKOS
$11B
$2.47M 0.01%
32,863
-9,061
-22% -$573K
ZD icon
592
Ziff Davis
ZD
$1.88B
$2.46M 0.01%
29,004
-388
-1% -$28.1K
PNC icon
593
PNC Financial Services
PNC
$102B
$2.45M 0.01%
16,446
+1,296
+9% +$166K
BIIB icon
594
Biogen
BIIB
$31.1B
$2.44M 0.01%
9,972
-412
-4% -$106K
CRL icon
595
Charles River Laboratories
CRL
$13.6B
$2.43M 0.01%
9,733
+4,198
+76% +$1,000K
DHI icon
596
D.R. Horton
DHI
$41.5B
$2.42M 0.01%
35,064
-453
-1% -$33K
VOOV icon
597
Vanguard S&P 500 Value ETF
VOOV
$6.78B
$2.41M 0.01%
19,453
-589
-3% -$69K
LSCC icon
598
Lattice Semiconductor
LSCC
$18.4B
$2.39M 0.01%
52,176
+2,047
+4% +$79.1K
VTRS icon
599
Viatris
VTRS
$18.8B
$2.39M 0.01%
+127,484
New +$2.08M
KBWB icon
600
Invesco KBW Bank ETF
KBWB
$6.83B
$2.38M 0.01%
47,270
+17,206
+57% +$768K
22 23
24
25 26

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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.