We are live on ! Find out more
William Blair & Company

William Blair & Company Portfolio holdings

AUM $34.9B
1-Year Est. Return 18.88%
This Fund
S&P 500
This Quarter Est. Return
-3.16%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+512.03%
AUM
$34.9B
AUM Growth
-$2.36B
Cap. Flow
-$465K
Cap. Flow %
-0%
Top 10 Hldgs %
25.64%
Holding
2,019
New
132
Increased
799
Reduced
746
Closed
97

Top Buys

Rank Stock Value
1
RSP icon
Invesco S&P 500 Equal Weight ETF
RSP
+$224M
2
VEU icon
Vanguard FTSE All-World ex-US ETF
VEU
+$113M
3
PWR icon
Quanta Services
PWR
+$75M
4
GLD icon
SPDR Gold Trust
GLD
+$58.9M
5
BA icon
Boeing
BA
+$55.5M

Top Sells

Rank Stock Value
1
WDAY icon
Workday
WDAY
+$91.2M
2
CWAN
Clearwater Analytics
CWAN
+$78M
3
APP icon
Applovin
APP
+$74.7M
4
TYL icon
Tyler Technologies
TYL
+$69.1M
5
UBER icon
Uber
UBER
+$62.2M

Sector Composition

Rank Sector Weight
1 Technology 21.79%
2 Industrials 14.2%
3 Financials 12.26%
4 Healthcare 10.59%
5 Consumer Discretionary 7.17%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MBWM icon
1076
Mercantile Bank Corp
MBWM
$1.04B
$616K ﹤0.01%
+12,189
New +$626K
RMAX icon
1077
RE/MAX Holdings
RMAX
$198M
$615K ﹤0.01%
106,837
-1,040
-1% -$7.2K
MUSA icon
1078
Murphy USA
MUSA
$11.4B
$614K ﹤0.01%
1,244
+110
+10% +$47.1K
PECO icon
1079
Phillips Edison & Co
PECO
$5.5B
$614K ﹤0.01%
16,403
+5,392
+49% +$200K
BHP icon
1080
BHP
BHP
$211B
$613K ﹤0.01%
8,421
+2,943
+54% +$208K
EPAM icon
1081
EPAM Systems
EPAM
$5.58B
$612K ﹤0.01%
4,522
-4,353
-49% -$744K
FTCS icon
1082
First Trust Capital Strength ETF
FTCS
$8.05B
$612K ﹤0.01%
6,597
-159
-2% -$15.3K
NTSK
1083
Netskope Inc
NTSK
$4.83B
$611K ﹤0.01%
72,008
-65,130
-47% -$808K
EQNR icon
1084
Equinor
EQNR
$97.3B
$610K ﹤0.01%
14,455
-382
-3% -$11.5K
EWU icon
1085
iShares MSCI United Kingdom ETF
EWU
$4.1B
$609K ﹤0.01%
13,370
-2,418
-15% -$111K
DBC icon
1086
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
$607K ﹤0.01%
20,962
+125
+0.6% +$3.17K
LII icon
1087
Lennox International
LII
$15B
$606K ﹤0.01%
1,306
-38
-3% -$19.6K
EPP icon
1088
iShares MSCI Pacific ex Japan ETF
EPP
$2.21B
$605K ﹤0.01%
11,379
+344
+3% +$18.5K
MP icon
1089
MP Materials
MP
$6.78B
$603K ﹤0.01%
12,491
-1,618
-11% -$96.8K
IHG icon
1090
InterContinental Hotels
IHG
$23.8B
$600K ﹤0.01%
4,497
+356
+9% +$49K
GMED icon
1091
Globus Medical
GMED
$11.1B
$599K ﹤0.01%
6,948
+88
+1% +$7.9K
NVT icon
1092
nVent Electric
NVT
$21.6B
$596K ﹤0.01%
5,037
-3,616
-42% -$411K
LDOS icon
1093
Leidos
LDOS
$14.4B
$593K ﹤0.01%
3,816
-16,608
-81% -$2.98M
PEN icon
1094
Penumbra
PEN
$12.6B
$593K ﹤0.01%
1,806
-6,504
-78% -$2.2M
SONY icon
1095
Sony
SONY
$137B
$593K ﹤0.01%
28,635
-28,615
-50% -$641K
XPH icon
1096
State Street SPDR S&P Pharmaceuticals ETF
XPH
$481M
$593K ﹤0.01%
10,955
+10,104
+1,187% +$563K
CG icon
1097
Carlyle Group
CG
$16.1B
$592K ﹤0.01%
12,237
-5,011
-29% -$276K
ICLN icon
1098
iShares Global Clean Energy ETF
ICLN
$2.22B
$590K ﹤0.01%
32,255
-200
-0.6% -$3.64K
BAC.PRL icon
1099
Bank of America Series L
BAC.PRL
$3.93B
$589K ﹤0.01%
494
-24
-5% -$29.7K
ILCG icon
1100
iShares Morningstar Growth ETF
ILCG
$3B
$588K ﹤0.01%
6,159
+2
+0% +$203
42 43
44
45 46

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 1-Year Est. Return
Daiwa Securities Group
Daiwa Securities Group Tokyo, Japan $34.8B AUM 20.7% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Pacer Advisors
Pacer Advisors Malvern, Pennsylvania $35.6B AUM 18.19% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return

William Blair & Company's Q1 2026 Portfolio in Review

As of Q1 2026, William Blair & Company held 2,019 positions worth $34.9B, down 6.3% from $37.3B the previous quarter. Its ten largest holdings account for 26% of the portfolio.

William Blair & Company's Q1 2026 filing shows 132 new, 799 increased, 746 reduced and 97 closed positions. Its largest new stake was Silicon Motion: 103,179 shares worth $11.6M. The largest sale was Workday, an estimated $91.2M.

By sector, the portfolio is most concentrated in Technology at 22% of assets, down from 26% a quarter earlier, followed by Industrials and Financials.

  • William Blair & Company's largest Q1 2026 buy was Silicon Motion: 103,179 shares worth $11.6M.
  • William Blair & Company added most to Invesco S&P 500 Equal Weight ETF in Q1 2026, an estimated $224M increase.
  • William Blair & Company's biggest Q1 2026 reduction was Workday, cutting an estimated $91.2M.
  • William Blair & Company fully exited Dynavax Technologies in Q1 2026, selling an estimated $27.4M.
  • William Blair & Company's ten largest holdings make up 26% of its $34.9B portfolio in Q1 2026.
  • William Blair & Company opened 132 new positions and closed 97 in Q1 2026.
  • William Blair & Company's portfolio value fell 6.3% quarter-over-quarter to $34.9B.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.