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
AEP icon
426
American Electric Power
AEP
$65.9B
$7.56M 0.02%
55,280
+1,834
+3% +$242K
SLDB icon
427
Solid Biosciences
SLDB
$894M
$7.56M 0.02%
756,277
+105,061
+16% +$797K
IYW icon
428
iShares US Technology ETF
IYW
$25B
$7.49M 0.02%
29,713
+336
+1% +$77.2K
VNOM icon
429
Viper Energy
VNOM
$8.89B
$7.49M 0.02%
176,658
-5,427
-3% -$251K
CORZ icon
430
Core Scientific
CORZ
$5.26B
$7.49M 0.02%
292,513
+444
+0.2% +$10.5K
USMV icon
431
iShares MSCI USA Min Vol Factor ETF
USMV
$23.7B
$7.45M 0.02%
77,283
-2,286
-3% -$217K
SCHX icon
432
Schwab US Large- Cap ETF
SCHX
$73.2B
$7.45M 0.02%
253,193
+16,378
+7% +$468K
CSX icon
433
CSX Corp
CSX
$89.8B
$7.36M 0.02%
154,911
+20,123
+15% +$909K
IWP icon
434
iShares Russell Mid-Cap Growth ETF
IWP
$19B
$7.36M 0.02%
50,288
+3,313
+7% +$457K
DT icon
435
Dynatrace
DT
$15.7B
$7.35M 0.02%
167,281
-25,056
-13% -$976K
CACI icon
436
CACI
CACI
$13.9B
$7.26M 0.02%
15,666
-10,572
-40% -$5.4M
PHYS icon
437
Sprott Physical Gold
PHYS
$15.3B
$7.26M 0.02%
240,543
-1,112
-0.5% -$37.9K
MRSH
438
Marsh
MRSH
$86.3B
$7.26M 0.02%
41,504
+862
+2% +$144K
CARR icon
439
Carrier Global
CARR
$46.7B
$7.22M 0.02%
98,482
+2,479
+3% +$162K
TTE icon
440
TotalEnergies
TTE
$205B
$7.2M 0.02%
92,602
+3,813
+4% +$337K
SNPS icon
441
Synopsys
SNPS
$70.8B
$7.17M 0.02%
16,064
+534
+3% +$251K
KJAN icon
442
Innovator US Small Cap Power Buffer ETF January
KJAN
$320M
$7.16M 0.02%
156,948
-20,591
-12% -$912K
KRNT icon
443
Kornit Digital
KRNT
$667M
$7.15M 0.02%
439,786
-12,815
-3% -$203K
HSY icon
444
Hershey
HSY
$34.3B
$7.15M 0.02%
40,726
+476
+1% +$89.8K
VCIT icon
445
Vanguard Intermediate-Term Corporate Bond ETF
VCIT
$68.7B
$7.13M 0.02%
86,263
+13,297
+18% +$1.1M
MELI icon
446
Mercado Libre
MELI
$93.5B
$7.12M 0.02%
4,196
+752
+22% +$1.28M
ARM icon
447
Arm
ARM
$263B
$7.11M 0.02%
20,050
+4,003
+25% +$1.06M
UNF icon
448
Unifirst Corp
UNF
$4.89B
$7.1M 0.02%
26,851
-1,461
-5% -$382K
IVE icon
449
iShares S&P 500 Value ETF
IVE
$49.4B
$7.07M 0.02%
31,155
-9,887
-24% -$2.21M
NTRA icon
450
Natera
NTRA
$49.5B
$7.04M 0.02%
25,952
+19,320
+291% +$4.12M
16 17
18
19 20

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.