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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
SUSA icon
626
iShares ESG Optimized MSCI USA ETF
SUSA
$3.99B
$3.29M 0.01%
21,329
+3,791
+22% +$560K
SCHR
627
Schwab Intermediately-Term US Treasury ETF
SCHR
$13.3B
$3.28M 0.01%
132,995
+4,011
+3% +$99.1K
ED icon
628
Consolidated Edison
ED
$39B
$3.28M 0.01%
29,645
+1,709
+6% +$186K
BOOT icon
629
Boot Barn
BOOT
$3.72B
$3.26M 0.01%
19,869
+4,870
+32% +$790K
NTNX icon
630
Nutanix
NTNX
$18.6B
$3.26M 0.01%
64,047
+932
+1% +$42.1K
MOAT icon
631
VanEck Morningstar Wide Moat ETF
MOAT
$11.7B
$3.25M 0.01%
31,310
-1,793
-5% -$181K
PRI icon
632
Primerica
PRI
$8.98B
$3.24M 0.01%
11,404
-291
-2% -$79.6K
CRDO icon
633
Credo Technology Group
CRDO
$30.4B
$3.24M 0.01%
11,909
-1,498
-11% -$296K
IWY icon
634
iShares Russell Top 200 Growth ETF
IWY
$15.5B
$3.24M 0.01%
11,133
+26
+0.2% +$7.34K
HEI.A icon
635
HEICO Corp Class A
HEI.A
$31.1B
$3.22M 0.01%
12,474
+2,235
+22% +$511K
IBB icon
636
iShares Biotechnology ETF
IBB
$10.3B
$3.2M 0.01%
16,849
+2,072
+14% +$356K
SITE icon
637
SiteOne Landscape Supply
SITE
$3.86B
$3.19M 0.01%
27,923
-2,188
-7% -$264K
SNA icon
638
Snap-on
SNA
$19.3B
$3.16M 0.01%
7,850
+47
+0.6% +$17.8K
FIG
639
Figma
FIG
$12.3B
$3.15M 0.01%
174,161
+120,753
+226% +$2.43M
XEL icon
640
Xcel Energy
XEL
$45.4B
$3.14M 0.01%
39,054
+315
+0.8% +$25.1K
HCA icon
641
HCA Healthcare
HCA
$93.2B
$3.12M 0.01%
7,993
+141
+2% +$59.6K
FNF icon
642
Fidelity National Financial
FNF
$11.5B
$3.12M 0.01%
66,081
-3,009
-4% -$146K
AZO icon
643
AutoZone
AZO
$46.5B
$3.11M 0.01%
974
-360
-27% -$1.2M
ZAP
644
Global X U.S. Electrification ETF
ZAP
$449M
$3.09M 0.01%
89,197
+5,037
+6% +$170K
KAPR icon
645
Innovator US Small Cap Power Buffer ETF April
KAPR
$213M
$3.07M 0.01%
77,253
-15,517
-17% -$598K
VTIP icon
646
Vanguard Short-Term Inflation-Protected Securities Index Fund
VTIP
$20.4B
$3.07M 0.01%
61,047
-1,660
-3% -$83.4K
DOCU
647
DocuSign
DOCU
$13.2B
$3.04M 0.01%
68,440
-53,804
-44% -$2.52M
WTFC icon
648
Wintrust Financial
WTFC
$10B
$3.04M 0.01%
18,905
+49
+0.3% +$7.37K
VST icon
649
Vistra
VST
$47.1B
$3.03M 0.01%
19,088
+827
+5% +$128K
UAL icon
650
United Airlines
UAL
$34.5B
$3.02M 0.01%
22,205
+850
+4% +$88K
24 25
26
27 28

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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.