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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
+5.82%
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
$30.9B
AUM Growth
+$843M
Cap. Flow
-$358M
Cap. Flow %
-1.16%
Top 10 Hldgs %
16.89%
Holding
389
New
33
Increased
152
Reduced
179
Closed
22

Top Buys

Rank Stock Value
1
CRL icon
Charles River Laboratories
CRL
+$239M
2
RYAAY icon
Ryanair
RYAAY
+$210M
3
DT icon
Dynatrace
DT
+$201M
4
CERT icon
Certara
CERT
+$155M
5
LESL icon
Leslie's
LESL
+$148M

Top Sells

Rank Stock Value
1
SEDG icon
SolarEdge
SEDG
+$265M
2
TSM icon
TSMC
TSM
+$235M
3
STE icon
Steris
STE
+$187M
4
MDB icon
MongoDB
MDB
+$173M
5
ETSY icon
Etsy
ETSY
+$170M

Sector Composition

Rank Sector Weight
1 Technology 24.51%
2 Healthcare 21.08%
3 Industrials 14.45%
4 Consumer Discretionary 12.96%
5 Financials 7.5%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake
Capital Flow
SBCF icon
276
Seacoast Banking Corp of Florida
SBCF
$3.44B
$11M 0.04%
304,614
-178,115
-37% -$6.21M
JNK icon
277
State Street SPDR Bloomberg High Yield Bond ETF
JNK
$7.31B
$10.9M 0.04%
100,160
-11,900
-11% -$1.29M
HASI icon
278
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$5.37B
$10.5M 0.03%
187,028
+18,749
+11% +$1.13M
SHOP icon
279
Shopify
SHOP
$194B
$10.5M 0.03%
94,470
+25,540
+37% +$3.09M
XLF icon
280
State Street Financial Select Sector SPDR ETF
XLF
$59.1B
$10.4M 0.03%
+304,660
New +$9.79M
UNF icon
281
Unifirst Corp
UNF
$5.24B
$10.3M 0.03%
46,022
-26,917
-37% -$6.2M
PACW
282
DELISTED
PacWest Bancorp
PACW
$10.2M 0.03%
267,009
-156,005
-37% -$5.47M
FCN icon
283
FTI Consulting
FCN
$4.22B
$10.1M 0.03%
71,958
-42,050
-37% -$4.98M
CNO icon
284
CNO Financial Group
CNO
$5.02B
$9.99M 0.03%
411,359
-240,802
-37% -$5.73M
XLE icon
285
State Street Energy Select Sector SPDR ETF
XLE
$39.9B
$9.94M 0.03%
+405,200
New +$9.35M
CNC icon
286
Centene
CNC
$33.1B
$9.72M 0.03%
152,087
-4,659
-3% -$288K
GMED icon
287
Globus Medical
GMED
$11.5B
$9.62M 0.03%
+156,022
New +$9.88M
THG icon
288
Hanover Insurance
THG
$7.74B
$9.52M 0.03%
73,500
-43,029
-37% -$5.19M
MUSA icon
289
Murphy USA
MUSA
$10.1B
$9.44M 0.03%
65,295
-43,183
-40% -$5.58M
AVNT icon
290
Avient
AVNT
$4.16B
$9.37M 0.03%
198,282
-115,830
-37% -$5.16M
FNB icon
291
FNB Corp
FNB
$6.86B
$9.32M 0.03%
733,937
-428,848
-37% -$4.96M
MTX icon
292
Minerals Technologies
MTX
$2.25B
$9.28M 0.03%
123,156
-72,021
-37% -$5.09M
SASR
293
DELISTED
Sandy Spring Bancorp Inc
SASR
$9.24M 0.03%
212,862
-124,710
-37% -$4.74M
MCRI icon
294
Monarch Casino & Resort
MCRI
$2.22B
$9.2M 0.03%
151,774
-69,921
-32% -$4.27M
CHX
295
DELISTED
ChampionX
CHX
$9.18M 0.03%
422,349
+46,115
+12% +$896K
SLGN icon
296
Silgan Holdings
SLGN
$4.3B
$9.1M 0.03%
216,415
-126,848
-37% -$4.95M
PDCE
297
DELISTED
PDC Energy, Inc.
PDCE
$9.07M 0.03%
263,572
-201,192
-43% -$6.04M
UMPQ
298
DELISTED
Umpqua Holdings Corp
UMPQ
$9.03M 0.03%
514,249
-300,936
-37% -$5.09M
OGS icon
299
ONE Gas
OGS
$5.05B
$8.96M 0.03%
116,474
-68,183
-37% -$4.98M
CHDN icon
300
Churchill Downs
CHDN
$6.17B
$8.86M 0.03%
77,954
-35,794
-31% -$3.94M

Similar funds

William Blair Investment Management's Q1 2021 Portfolio in Review

As of Q1 2021, William Blair Investment Management held 389 positions worth $30.9B, up 2.8% from $30B the previous quarter. Its ten largest holdings account for 17% of the portfolio.

William Blair Investment Management's Q1 2021 filing shows 33 new, 152 increased, 179 reduced and 22 closed positions. Its largest new stake was Dynatrace: 4,138,525 shares worth $200M. The largest sale was SolarEdge, an estimated $265M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, down from 27% a quarter earlier, followed by Healthcare and Industrials.

  • William Blair Investment Management's largest Q1 2021 buy was Dynatrace: 4,138,525 shares worth $200M.
  • William Blair Investment Management added most to Charles River Laboratories in Q1 2021, an estimated $239M increase.
  • William Blair Investment Management's biggest Q1 2021 reduction was TSMC, cutting an estimated $235M.
  • William Blair Investment Management fully exited SolarEdge in Q1 2021, selling an estimated $265M.
  • William Blair Investment Management's ten largest holdings make up 17% of its $30.9B portfolio in Q1 2021.
  • William Blair Investment Management opened 33 new positions and closed 22 in Q1 2021.
  • William Blair Investment Management's portfolio value rose 2.8% quarter-over-quarter to $30.9B.

Based on William Blair Investment Management's 13F filing for Q1 2021, filed 13 May 2021.