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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
PRVA icon
1251
Privia Health
PRVA
$2.6B
$475K ﹤0.01%
18,477
-245
-1% -$5.67K
SPHY icon
1252
State Street SPDR Portfolio High Yield Bond ETF
SPHY
$12B
$474K ﹤0.01%
20,223
+250
+1% +$5.86K
FFIV icon
1253
F5
FFIV
$24.4B
$473K ﹤0.01%
+1,136
New +$404K
FLY
1254
Firefly Aerospace
FLY
$3.43B
$472K ﹤0.01%
16,038
+5,588
+53% +$209K
SMDV icon
1255
ProShares Russell 2000 Dividend Growers ETF
SMDV
$683M
$470K ﹤0.01%
6,106
– –
CNO icon
1256
CNO Financial Group
CNO
$5.16B
$470K ﹤0.01%
9,218
+2,507
+37% +$116K
GFL icon
1257
GFL Environmental
GFL
$18.4B
$470K ﹤0.01%
+12,772
New +$483K
BOCT icon
1258
Innovator US Equity Buffer ETF October
BOCT
$284M
$470K ﹤0.01%
8,857
– –
GRAL
1259
GRAIL Inc
GRAL
$3.39B
$468K ﹤0.01%
6,860
+484
+8% +$28.5K
EQNR icon
1260
Equinor
EQNR
$109B
$465K ﹤0.01%
14,808
+353
+2% +$13.2K
CAKE icon
1261
Cheesecake Factory
CAKE
$4.81B
$464K ﹤0.01%
5,831
-3,052
-34% -$198K
SLYV icon
1262
State Street SPDR S&P 600 Small Cap Value ETF
SLYV
$4.92B
$463K ﹤0.01%
4,246
-2
-0% -$206
ABM icon
1263
ABM Industries
ABM
$2.93B
$463K ﹤0.01%
10,456
+1,141
+12% +$46.8K
NOG icon
1264
Northern Oil and Gas
NOG
$2.89B
$461K ﹤0.01%
25,393
-1,987
-7% -$47.1K
GEF icon
1265
Greif
GEF
$4.63B
$460K ﹤0.01%
6,176
+216
+4% +$14.5K
HLN icon
1266
Haleon
HLN
$40.6B
$456K ﹤0.01%
48,903
-2,566
-5% -$23.9K
BAP icon
1267
Credicorp
BAP
$29.6B
$453K ﹤0.01%
+1,163
New +$398K
IEV icon
1268
iShares Europe ETF
IEV
$1.63B
$451K ﹤0.01%
6,192
– –
GAP
1269
The Gap Inc
GAP
$7.18B
$449K ﹤0.01%
24,050
+10,781
+81% +$249K
ITIC
1270
Investors Title Co
ITIC
$569M
$449K ﹤0.01%
1,641
+257
+19% +$62.3K
HDB icon
1271
HDFC Bank
HDB
$116B
$446K ﹤0.01%
17,279
-3,277
-16% -$82.1K
PIE icon
1272
Invesco Dorsey Wright Emerging Markets Momentum ETF
PIE
$243M
$446K ﹤0.01%
13,350
+11,550
+642% +$358K
AIT icon
1273
Applied Industrial Technologies
AIT
$11.6B
$445K ﹤0.01%
+1,315
New +$403K
NLY icon
1274
Annaly Capital Management
NLY
$16.1B
$443K ﹤0.01%
19,830
+25
+0.1% +$552
SRPT icon
1275
Sarepta Therapeutics
SRPT
$2.19B
$443K ﹤0.01%
24,654
-1,036
-4% -$19.6K
49 50
51
52 53

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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.