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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
+11.26%
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
$28.7B
AUM Growth
+$2.56B
Cap. Flow
+$530M
Cap. Flow %
1.85%
Top 10 Hldgs %
19.55%
Holding
425
New
24
Increased
254
Reduced
112
Closed
32

Top Buys

Rank Stock Value
1
RACE icon
Ferrari
RACE
+$191M
2
TSM icon
TSMC
TSM
+$128M
3
KOS icon
Kosmos Energy
KOS
+$111M
4
FIVE icon
Five Below
FIVE
+$111M
5
AMD icon
Advanced Micro Devices
AMD
+$86.5M

Top Sells

Rank Stock Value
1
HALO icon
Halozyme
HALO
+$211M
2
SYK icon
Stryker
SYK
+$153M
3
WH icon
Wyndham Hotels & Resorts
WH
+$113M
4
FTI icon
TechnipFMC
FTI
+$92.8M
5
AZTA icon
Azenta
AZTA
+$78.7M

Sector Composition

Rank Sector Weight
1 Technology 25.27%
2 Industrials 16.92%
3 Consumer Discretionary 15.22%
4 Healthcare 14.65%
5 Financials 9.04%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CMA
401
DELISTED
Comerica
CMA
– –
-3,592
Closed -$240K
EFX icon
402
Equifax
EFX
$21.2B
– –
-234,041
Closed -$45.5M
EPAM icon
403
EPAM Systems
EPAM
$5.17B
– –
-1,175
Closed -$385K
FIS icon
404
Fidelity National Information Services
FIS
$21.6B
– –
-73,081
Closed -$4.96M
GNRC icon
405
Generac Holdings
GNRC
$13.1B
– –
-3,278
Closed -$330K
HALO icon
406
Halozyme
HALO
$11.6B
– –
-3,706,003
Closed -$211M
HIG icon
407
Hartford Financial Services
HIG
$37.7B
– –
-2,853
Closed -$216K
HIW icon
408
Highwoods Properties
HIW
$3.46B
– –
-8,488
Closed -$237K
HSIC icon
409
Henry Schein
HSIC
$10.1B
– –
-3,456
Closed -$276K
IWF icon
410
iShares Russell 1000 Growth ETF
IWF
$128B
– –
-3,060
Closed -$164K
IWN icon
411
iShares Russell 2000 Value ETF
IWN
$14.6B
– –
-17,664
Closed -$2.45M
LPLA icon
412
LPL Financial
LPLA
$29.7B
– –
-108,703
Closed -$23.5M
MTRN icon
413
Materion
MTRN
$5.9B
– –
-390,660
Closed -$34.2M
OC icon
414
Owens Corning
OC
$12.3B
– –
-8,368
Closed -$714K
SNV
415
DELISTED
Synovus
SNV
– –
-6,165
Closed -$231K
SYK icon
416
Stryker
SYK
$133B
– –
-625,992
Closed -$153M
U icon
417
Unity
U
$19.6B
– –
-1,052,540
Closed -$30.1M
WING icon
418
Wingstop
WING
$3.05B
– –
-76,820
Closed -$10.6M
ZD icon
419
Ziff Davis
ZD
$1.88B
– –
-321,808
Closed -$25.5M
FTCH
420
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
– –
-205,871
Closed -$974K
PACW
421
DELISTED
PacWest Bancorp
PACW
– –
-1,337,664
Closed -$30.7M
AJRD
422
DELISTED
Aerojet Rocketdyne Holdings
AJRD
– –
-99,320
Closed -$5.55M
COUP
423
DELISTED
Coupa Software Incorporated
COUP
– –
-5,183
Closed -$410K
HZNP
424
DELISTED
Horizon Therapeutics Public Limited Company Ordinary Shares
HZNP
– –
-162,062
Closed -$18.4M
SIVB
425
DELISTED
SVB Financial Group
SIVB
– –
-47,451
Closed -$10.9M
13 14 15 16
17

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William Blair Investment Management's Q1 2023 Portfolio in Review

As of Q1 2023, William Blair Investment Management held 425 positions worth $28.7B, up 9.8% from $26.1B the previous quarter. Its ten largest holdings account for 20% of the portfolio.

William Blair Investment Management's Q1 2023 filing shows 24 new, 254 increased, 112 reduced and 32 closed positions. Its largest new stake was Ferrari: 749,761 shares worth $203M. The largest sale was Halozyme, an estimated $211M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, up from 23% a quarter earlier, followed by Industrials and Consumer Discretionary.

  • William Blair Investment Management's largest Q1 2023 buy was Ferrari: 749,761 shares worth $203M.
  • William Blair Investment Management added most to TSMC in Q1 2023, an estimated $128M increase.
  • William Blair Investment Management's biggest Q1 2023 reduction was Wyndham Hotels & Resorts, cutting an estimated $113M.
  • William Blair Investment Management fully exited Halozyme in Q1 2023, selling an estimated $211M.
  • William Blair Investment Management's ten largest holdings make up 20% of its $28.7B portfolio in Q1 2023.
  • William Blair Investment Management opened 24 new positions and closed 32 in Q1 2023.
  • William Blair Investment Management's portfolio value rose 9.8% quarter-over-quarter to $28.7B.

Based on William Blair Investment Management's 13F filing for Q1 2023, filed 12 May 2023.