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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
VOO icon
176
Vanguard S&P 500 ETF
VOO
$1.03T
$27.9M 0.1%
81,090
-3,333
-4% -$1.09M
DAY
177
DELISTED
Dayforce
DAY
$27.7M 0.1%
259,706
+4,589
+2% +$434K
NEE icon
178
NextEra Energy
NEE
$179B
$27.5M 0.1%
356,591
+8,147
+2% +$609K
PTON icon
179
Peloton Interactive
PTON
$2.38B
$27.3M 0.1%
180,149
-15,054
-8% -$1.83M
PAYX icon
180
Paychex
PAYX
$42.8B
$27.3M 0.1%
292,970
+4,442
+2% +$394K
ADPT icon
181
Adaptive Biotechnologies
ADPT
$4.02B
$26.4M 0.1%
446,953
+16,955
+4% +$874K
JLL icon
182
Jones Lang LaSalle
JLL
$16.7B
$26.3M 0.1%
177,435
+18,840
+12% +$2.42M
PHR icon
183
Phreesia
PHR
$758M
$25.7M 0.09%
473,432
+197,099
+71% +$8.46M
AMGN icon
184
Amgen
AMGN
$225B
$25.4M 0.09%
110,656
+7,651
+7% +$1.76M
GS icon
185
Goldman Sachs
GS
$302B
$25.4M 0.09%
96,449
-5,038
-5% -$1.12M
COO icon
186
Cooper Companies
COO
$15B
$24.9M 0.09%
274,304
-3,344
-1% -$287K
VYM icon
187
Vanguard High Dividend Yield ETF
VYM
$84B
$24.9M 0.09%
272,023
-163,602
-38% -$14.2M
VWO icon
188
Vanguard FTSE Emerging Markets ETF
VWO
$126B
$24.9M 0.09%
495,988
+17,167
+4% +$807K
HEI icon
189
HEICO Corp
HEI
$52.1B
$24.8M 0.09%
187,429
-7,634
-4% -$931K
SMAR
190
DELISTED
Smartsheet Inc.
SMAR
$24.4M 0.09%
351,920
-1,252
-0.4% -$73.4K
FIS icon
191
Fidelity National Information Services
FIS
$21.6B
$24.3M 0.09%
172,104
+127
+0.1% +$18.1K
OPRX icon
192
OptimizeRx
OPRX
$132M
$24.3M 0.09%
779,924
+14,776
+2% +$362K
RDFN
193
DELISTED
Redfin
RDFN
$24.2M 0.09%
353,227
+11,781
+3% +$630K
BSV icon
194
Vanguard Short-Term Bond ETF
BSV
$45.6B
$23.9M 0.09%
288,870
+206,379
+250% +$17.1M
CSCO icon
195
Cisco
CSCO
$488B
$23.5M 0.09%
525,132
-210,713
-29% -$8.66M
TENB icon
196
Tenable Holdings
TENB
$4.08B
$23.4M 0.09%
447,578
+2,953
+0.7% +$117K
ITOT icon
197
iShares Core S&P Total US Stock Market ETF
ITOT
$97.8B
$23.4M 0.09%
271,205
+21,693
+9% +$1.76M
NTRS icon
198
Northern Trust
NTRS
$35B
$23.3M 0.09%
250,278
-273,103
-52% -$24.1M
IWB icon
199
iShares Russell 1000 ETF
IWB
$50.2B
$23.3M 0.09%
109,983
+27
+0% +$5.39K
MDY icon
200
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27.2B
$23.1M 0.08%
54,964
+5,166
+10% +$1.99M
6 7
8
9 10

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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.