We are live on ! Find out more
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
+19.08%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+606.62%
AUM
$38.4B
AUM Growth
+$3.49B
Cap. Flow
-$792M
Cap. Flow %
-2.06%
Top 10 Hldgs %
26.32%
Holding
2,083
New
163
Increased
891
Reduced
708
Closed
85

Top Buys

Rank Stock Value
1
HONA
Honeywell Aerospace
HONA
+$100M
2
ANET icon
Arista Networks
ANET
+$71.2M
3
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$61.8M
4
VTI icon
Vanguard Morningstar Total Stock Market ETF
VTI
+$55.8M
5
MIAX
Miami International Holdings
MIAX
+$49.4M

Top Sells

Rank Stock Value
1
XOM icon
ExxonMobil
XOM
+$161M
2
CPRT icon
Copart
CPRT
+$62M
3
DHR icon
Danaher
DHR
+$59.1M
4
AAPL icon
Apple
AAPL
+$57M
5
VEEV icon
Veeva Systems
VEEV
+$52.2M

Sector Composition

Rank Sector Weight
1 Technology 24.38%
2 Miscellaneous 18.67%
3 Industrials 15.24%
4 Financials 11.07%
5 Healthcare 9.11%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
XLF icon
251
State Street Financial Select Sector SPDR ETF
XLF
$54.5B
$21M 0.05%
391,529
-155,103
-28% -$8.06M
SLV icon
252
iShares Silver Trust
SLV
$30.6B
$20.8M 0.05%
389,811
-3,325
-0.8% -$220K
CEG icon
253
Constellation Energy
CEG
$93.7B
$20.6M 0.05%
82,871
+4,946
+6% +$1.39M
MEC icon
254
Mayville Engineering Co
MEC
$487M
$20.5M 0.05%
546,714
-18,586
-3% -$497K
JEPI icon
255
JPMorgan Equity Premium Income ETF
JEPI
$45.5B
$20.3M 0.05%
360,228
+76,582
+27% +$4.33M
IWR icon
256
iShares Russell Mid-Cap ETF
IWR
$55.9B
$20.1M 0.05%
182,347
+16,041
+10% +$1.69M
VMI icon
257
Valmont Industries
VMI
$9.33B
$19.9M 0.05%
34,368
-908
-3% -$457K
DGX icon
258
Quest Diagnostics
DGX
$25.9B
$19.8M 0.05%
93,291
+1,319
+1% +$259K
ADI icon
259
Analog Devices
ADI
$175B
$19.7M 0.05%
49,572
-5,218
-10% -$2.07M
RKLB icon
260
Rocket Lab Corp
RKLB
$40B
$19.6M 0.05%
193,301
-8,260
-4% -$823K
NVS icon
261
Novartis
NVS
$264B
$19.6M 0.05%
125,266
-1,155
-0.9% -$173K
EHC icon
262
Encompass Health
EHC
$12B
$19.6M 0.05%
193,702
-13,540
-7% -$1.4M
FSV icon
263
FirstService
FSV
$6.02B
$19.4M 0.05%
136,539
-9,775
-7% -$1.36M
COIN icon
264
Coinbase
COIN
$50.5B
$19.4M 0.05%
132,565
-152,225
-53% -$27.5M
RYAN icon
265
Ryan Specialty Holdings
RYAN
$4.65B
$19.2M 0.05%
508,270
-1,133,310
-69% -$38.5M
CL icon
266
Colgate-Palmolive
CL
$69.2B
$18.9M 0.05%
205,860
-9,229
-4% -$807K
VXF icon
267
Vanguard Extended Market ETF
VXF
$30.8B
$18.7M 0.05%
75,777
-2,580
-3% -$591K
CSGP icon
268
CoStar Group
CSGP
$12.3B
$18.6M 0.05%
658,159
-242,154
-27% -$8.33M
PAVE icon
269
Global X US Infrastructure Development ETF
PAVE
$13.4B
$18.6M 0.05%
316,206
+42,993
+16% +$2.41M
KMI icon
270
Kinder Morgan
KMI
$68.9B
$18.6M 0.05%
580,899
-4,440
-0.8% -$143K
VRSK icon
271
Verisk Analytics
VRSK
$22.9B
$18.6M 0.05%
103,394
-276,712
-73% -$48.7M
RCL icon
272
Royal Caribbean
RCL
$69.6B
$18.5M 0.05%
58,275
-13,481
-19% -$3.77M
MO icon
273
Altria Group
MO
$118B
$18.4M 0.05%
255,406
+51,968
+26% +$3.63M
AZN icon
274
AstraZeneca
AZN
$254B
$18.3M 0.05%
96,681
-3,941
-4% -$741K
LMT icon
275
Lockheed Martin
LMT
$122B
$18.2M 0.05%
35,802
+669
+2% +$362K
9 10
11
12 13

Similar funds

Bank Julius Baer & Co
Bank Julius Baer & Co Zurich, Switzerland $38.6B AUM 35.31% 1-Year Est. Return
Public Sector Pension Investment Board (PSP Investments)
Public Sector Pension Investment Board (PSP Investments) Montreal, Quebec, Canada $38.7B AUM 44.46% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $38.8B AUM 41.35% 1-Year Est. Return
TWC
TD Waterhouse Canada Toronto, Ontario, Canada $38B AUM 39.14% 1-Year Est. Return
Treasurer of the State of North Carolina
Treasurer of the State of North Carolina Raleigh, North Carolina $38.8B AUM 40.77% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return
PIF
Public Investment Fund Al Aqiq District, Riyadh, Saudi Arabia $37.9B AUM 7.98% 1-Year Est. Return
Asset Management One
Asset Management One Tokyo, Japan $39B AUM 37.51% 1-Year Est. Return

William Blair & Company's Q2 2026 Portfolio in Review

As of Q2 2026, William Blair & Company held 2,083 positions worth $38.4B, up 10% from $34.9B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

William Blair & Company's Q2 2026 filing shows 163 new, 891 increased, 708 reduced and 85 closed positions. Its largest new stake was Honeywell Aerospace: 454,071 shares worth $100M. The largest sale was ExxonMobil, an estimated $161M.

By sector, the portfolio is most concentrated in Technology at 24% of assets, up from 22% a quarter earlier, followed by Miscellaneous and Industrials.

  • William Blair & Company's largest Q2 2026 buy was Honeywell Aerospace: 454,071 shares worth $100M.
  • William Blair & Company added most to Arista Networks in Q2 2026, an estimated $71.2M increase.
  • William Blair & Company's biggest Q2 2026 reduction was Copart, cutting an estimated $62M.
  • William Blair & Company fully exited ExxonMobil in Q2 2026, selling an estimated $161M.
  • William Blair & Company's ten largest holdings make up 26% of its $38.4B portfolio in Q2 2026.
  • William Blair & Company opened 163 new positions and closed 85 in Q2 2026.
  • William Blair & Company's portfolio value rose 10% quarter-over-quarter to $38.4B.

Based on William Blair & Company's 13F filing for Q2 2026, filed 11 Aug 2026.