We are live on ! Find out more
William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $33.3B
1-Year Est. Return 44.76%
This Fund
S&P 500
This Quarter Est. Return
+25.48%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
AUM
$30B
AUM Growth
+$4.37B
Cap. Flow
-$974M
Cap. Flow %
-3.24%
Top 10 Hldgs %
17.75%
Holding
375
New
32
Increased
99
Reduced
224
Closed
19

Top Buys

Rank Stock Value
1
TECH icon
Bio-Techne
TECH
+$212M
2
TXG icon
10x Genomics
TXG
+$186M
3
TMX
Terminix Global Holdings, Inc.
TMX
+$126M
4
MMSI icon
Merit Medical Systems
MMSI
+$125M
5
ZEN
ZENDESK INC
ZEN
+$121M

Top Sells

Rank Stock Value
1
IRTC icon
iRhythm Holdings
IRTC
+$255M
2
EXAS
Exact Sciences
EXAS
+$246M
3
TRU icon
TransUnion
TRU
+$166M
4
BN icon
Brookfield
BN
+$112M
5
TSM icon
TSMC
TSM
+$104M

Sector Composition

Rank Sector Weight
1 Technology 26.72%
2 Healthcare 19.58%
3 Industrials 13.65%
4 Consumer Discretionary 13.62%
5 Financials 6.72%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ERII icon
251
Energy Recovery
ERII
$397M
$13.7M 0.05%
1,004,266
+797,805
+386% +$8.51M
THG icon
252
Hanover Insurance
THG
$7.74B
$13.6M 0.05%
116,529
-2,294
-2% -$247K
MCRI icon
253
Monarch Casino & Resort
MCRI
$2.22B
$13.6M 0.05%
221,695
+46,068
+26% +$2.32M
PAR icon
254
PAR Technology
PAR
$741M
$13.4M 0.04%
+213,291
New +$10.5M
EXP icon
255
Eagle Materials
EXP
$6.47B
$13.2M 0.04%
130,587
+4,211
+3% +$392K
VIAV icon
256
Viavi Solutions
VIAV
$10.6B
$13.2M 0.04%
879,255
+235,746
+37% +$3.13M
ROK icon
257
Rockwell Automation
ROK
$50.1B
$13.1M 0.04%
52,141
-14,279
-21% -$3.49M
CAG icon
258
Conagra Brands
CAG
$7.16B
$13.1M 0.04%
360,189
-98,750
-22% -$3.58M
CLVT icon
259
Clarivate
CLVT
$1.19B
$12.8M 0.04%
+430,199
New +$12.7M
CRI icon
260
Carter's
CRI
$1.43B
$12.8M 0.04%
135,802
+36,303
+36% +$3.19M
FCN icon
261
FTI Consulting
FCN
$4.22B
$12.7M 0.04%
114,008
-2,205
-2% -$237K
SLGN icon
262
Silgan Holdings
SLGN
$4.3B
$12.7M 0.04%
343,263
-6,771
-2% -$244K
AVNT icon
263
Avient
AVNT
$4.16B
$12.7M 0.04%
314,112
-6,175
-2% -$218K
ADC icon
264
Agree Realty
ADC
$9.25B
$12.7M 0.04%
190,015
-3,638
-2% -$238K
UMPQ
265
DELISTED
Umpqua Holdings Corp
UMPQ
$12.3M 0.04%
815,185
-16,031
-2% -$220K
AVY icon
266
Avery Dennison
AVY
$13.7B
$12.3M 0.04%
79,024
+2,544
+3% +$368K
BKH icon
267
Black Hills Corp
BKH
$5.58B
$12.2M 0.04%
199,338
-3,936
-2% -$235K
JNK icon
268
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$12.2M 0.04%
112,060
-7,500
-6% -$800K
MTX icon
269
Minerals Technologies
MTX
$2.25B
$12.1M 0.04%
195,177
-3,846
-2% -$228K
DPZ icon
270
Domino's
DPZ
$11.7B
$12M 0.04%
31,351
-8,581
-21% -$3.37M
COLB icon
271
Columbia Banking Systems
COLB
$9.12B
$12M 0.04%
334,607
+72,426
+28% +$2.25M
VOYA icon
272
Voya Financial
VOYA
$9.01B
$12M 0.04%
203,996
+21,095
+12% +$1.14M
HMN icon
273
Horace Mann Educators
HMN
$2.09B
$11.9M 0.04%
282,501
-5,572
-2% -$215K
TRNO icon
274
Terreno Realty
TRNO
$7.48B
$11.9M 0.04%
202,587
-19,809
-9% -$1.16M
HIW icon
275
Highwoods Properties
HIW
$3.46B
$11.8M 0.04%
298,615
-5,891
-2% -$213K
9 10
11
12 13

Similar funds

BAMCO Inc
BAMCO Inc New York $33.1B AUM 11.16% 1-Year Est. Return
GAM
Gotham Asset Management New York $32.7B AUM 27.65% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Hotchkis & Wiley Capital Management
Hotchkis & Wiley Capital Management Los Angeles, California $32.4B AUM 17.21% 1-Year Est. Return
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments) Montreal, Quebec, Canada $32.1B AUM 31.84% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
Treasurer of the State of North Carolina
Treasurer of the State of North Carolina Raleigh, North Carolina $31.8B AUM 28.93% 1-Year Est. Return

William Blair Investment Management's Q4 2020 Portfolio in Review

As of Q4 2020, William Blair Investment Management held 375 positions worth $30B, up 17% from $25.7B the previous quarter. Its ten largest holdings account for 18% of the portfolio.

William Blair Investment Management withdrew a net $974M in Q4 2020, closing 19 positions and reducing 224 holdings. Its most notable exit was iRhythm Holdings, an estimated $255M position sold in full.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Healthcare and Industrials.

Against the trend, William Blair Investment Management opened a new position in Bio-Techne worth $232M.

  • William Blair Investment Management's largest Q4 2020 buy was Bio-Techne: 2,923,168 shares worth $232M.
  • William Blair Investment Management added most to Terminix Global Holdings, Inc. in Q4 2020, an estimated $126M increase.
  • William Blair Investment Management's biggest Q4 2020 reduction was Exact Sciences, cutting an estimated $246M.
  • William Blair Investment Management fully exited iRhythm Holdings in Q4 2020, selling an estimated $255M.
  • William Blair Investment Management's ten largest holdings make up 18% of its $30B portfolio in Q4 2020.
  • William Blair Investment Management opened 32 new positions and closed 19 in Q4 2020.
  • William Blair Investment Management's portfolio value rose 17% quarter-over-quarter to $30B.

Based on William Blair Investment Management's 13F filing for Q4 2020, filed 9 Feb 2021.