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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
+17.18%
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
$37.7B
AUM Growth
+$2.06B
Cap. Flow
-$2.27B
Cap. Flow %
-6.03%
Top 10 Hldgs %
30.35%
Holding
461
New
38
Increased
117
Reduced
257
Closed
44

Top Buys

Rank Stock Value
1
BWXT icon
BWX Technologies
BWXT
+$149M
2
CART icon
Maplebear
CART
+$145M
3
BRBR icon
BellRing Brands
BRBR
+$144M
4
ORCL icon
Oracle
ORCL
+$139M
5
P
Everpure Inc
P
+$130M

Top Sells

Rank Stock Value
1
YUMC icon
Yum China
YUMC
+$217M
2
PANW icon
Palo Alto Networks
PANW
+$192M
3
ELF icon
e.l.f. Beauty
ELF
+$177M
4
LRN icon
Stride
LRN
+$176M
5
GTLS
Chart Industries
GTLS
+$153M

Sector Composition

Rank Sector Weight
1 Technology 35.89%
2 Consumer Discretionary 15.09%
3 Financials 13.13%
4 Healthcare 10.3%
5 Industrials 9.46%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
CNDT icon
426
Conduent
CNDT
$241M
– –
-6,065,757
Closed -$16.4M
CODI icon
427
Compass Diversified
CODI
$908M
– –
-1,786,331
Closed -$33.4M
DAR icon
428
Darling Ingredients
DAR
$10B
– –
-14,054
Closed -$439K
DLX icon
429
Deluxe
DLX
$1.09B
– –
-1,223,784
Closed -$19.3M
EAF icon
430
GrafTech
EAF
$201M
– –
-158,952
Closed -$1.39M
ETN icon
431
Eaton
ETN
$179B
– –
-12,052
Closed -$3.28M
FLYW icon
432
Flywire
FLYW
$2.12B
– –
-1,497,586
Closed -$14.2M
FUTU icon
433
Futu Holdings
FUTU
$14.7B
– –
-234,853
Closed -$24M
GPN icon
434
Global Payments
GPN
$23.4B
– –
-4,393
Closed -$430K
HASI icon
435
Hannon Armstrong Sustainable Infrastructure Capital
HASI
$5.37B
– –
-21,143
Closed -$618K
HELE icon
436
Helen of Troy
HELE
$696M
– –
-423,910
Closed -$22.7M
HI
437
DELISTED
Hillenbrand
HI
– –
-266,142
Closed -$6.42M
HIG icon
438
Hartford Financial Services
HIG
$37.7B
– –
-1,979
Closed -$245K
IPAR icon
439
Interparfums
IPAR
$3.78B
– –
-228,339
Closed -$26M
IWF icon
440
iShares Russell 1000 Growth ETF
IWF
$128B
– –
-162,400
Closed -$14.7M
IWP icon
441
iShares Russell Mid-Cap Growth ETF
IWP
$21B
– –
-860
Closed -$101K
JCI icon
442
Johnson Controls International
JCI
$92.6B
– –
-2,702
Closed -$216K
KO icon
443
Coca-Cola
KO
$373B
– –
-21,515
Closed -$1.54M
KOS icon
444
Kosmos Energy
KOS
$1.49B
– –
-17,169,011
Closed -$39.1M
KSPI icon
445
Kaspi.kz JSC
KSPI
$18.9B
– –
-45,460
Closed -$4.22M
LSCC icon
446
Lattice Semiconductor
LSCC
$18.4B
– –
-1,250,434
Closed -$65.6M
MDB icon
447
MongoDB
MDB
$35.2B
– –
-18,292
Closed -$3.21M
MLKN icon
448
MillerKnoll
MLKN
$1.64B
– –
-632,978
Closed -$12.1M
MTD icon
449
Mettler-Toledo International
MTD
$28.8B
– –
-1,534
Closed -$1.81M
NVO
450
Novo Nordisk
NVO
$203B
– –
-19,848
Closed -$1.38M
15 16 17
18
19

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William Blair Investment Management's Q2 2025 Portfolio in Review

As of Q2 2025, William Blair Investment Management held 461 positions worth $37.7B, up 5.8% from $35.6B the previous quarter. Its ten largest holdings account for 30% of the portfolio.

William Blair Investment Management withdrew a net $2.27B in Q2 2025, closing 44 positions and reducing 257 holdings. Its most notable exit was The AZEK Co, an estimated $123M position sold in full.

By sector, the portfolio is most concentrated in Technology at 36% of assets, up from 33% a quarter earlier, followed by Consumer Discretionary and Financials.

Against the trend, William Blair Investment Management opened a new position in Maplebear worth $151M.

  • William Blair Investment Management's largest Q2 2025 buy was Maplebear: 3,345,792 shares worth $151M.
  • William Blair Investment Management added most to BWX Technologies in Q2 2025, an estimated $149M increase.
  • William Blair Investment Management's biggest Q2 2025 reduction was Yum China, cutting an estimated $217M.
  • William Blair Investment Management fully exited The AZEK Co in Q2 2025, selling an estimated $123M.
  • William Blair Investment Management's ten largest holdings make up 30% of its $37.7B portfolio in Q2 2025.
  • William Blair Investment Management opened 38 new positions and closed 44 in Q2 2025.
  • William Blair Investment Management's portfolio value rose 5.8% quarter-over-quarter to $37.7B.

Based on William Blair Investment Management's 13F filing for Q2 2025, filed 29 Jul 2025.