We are live on
!
Find out more
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
(-6.3%)
Cap. Flow
-$465K
Cap. Flow
% of AUM
-0%
Top 10 Holdings %
Top 10 Hldgs %
25.64%
Holding
2,019
New
132
Increased
799
Reduced
746
Closed
97
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Invesco S&P 500 Equal Weight ETF
RSP
|
+$224M |
| 2 |
Vanguard FTSE All-World ex-US ETF
VEU
|
+$113M |
| 3 |
Quanta Services
PWR
|
+$75M |
| 4 |
SPDR Gold Trust
GLD
|
+$58.9M |
| 5 |
Boeing
BA
|
+$55.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Workday
WDAY
|
+$91.2M |
| 2 |
CWAN
Clearwater Analytics
CWAN
|
+$78M |
| 3 |
Applovin
APP
|
+$74.7M |
| 4 |
Tyler Technologies
TYL
|
+$69.1M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
976
State Street SPDR S&P International Small Cap ETF
GWX
$839M
| $888K | ﹤0.01% |
21,028
-390
| -2% | -$17K |
|
977
Zeta Global
ZETA
$5.5B
| $881K | ﹤0.01% |
55,362
-13,529
| -20% | -$250K |
|
978
Vanguard FTSE All-World ex-US Small-Cap Index Fund
VSS
$11B
| $880K | ﹤0.01% |
6,036
+34
| +0.6% | +$5.14K |
|
979
Mach Natural Resources
MNR
$2.21B
| $874K | ﹤0.01% |
+62,429
| New | +$786K |
|
980
AerCap
AER
$23.4B
| $870K | ﹤0.01% |
6,345
-995
| -14% | -$142K |
|
981
Global X NASDAQ-100 Covered Call ETF
QYLD
$7.88B
| $868K | ﹤0.01% |
50,637
+2,803
| +6% | +$49.3K |
|
|
LB
982
LandBridge Co
LB
$2.09B
| $868K | ﹤0.01% |
12,576
+101
| +0.8% | +$6.42K |
|
983
Celestica
CLS
$37.8B
| $864K | ﹤0.01% |
3,068
+1,224
| +66% | +$355K |
|
984
Fluor
FLR
$6.54B
| $861K | ﹤0.01% |
18,452
-39,871
| -68% | -$1.86M |
|
|
SVM
985
Silvercorp Metals
SVM
$2.02B
| $859K | ﹤0.01% |
80,000
-20,000
| -20% | -$220K |
|
986
Dime Commercial Bancshares
DCOM
$1.79B
| $859K | ﹤0.01% |
25,397
+69
| +0.3% | +$2.27K |
|
|
TLN
987
Talen Energy Corp
TLN
$15.1B
| $858K | ﹤0.01% |
2,687
-3,416
| -56% | -$1.21M |
|
988
Old National Bancorp
ONB
$10.2B
| $857K | ﹤0.01% |
38,787
+5,582
| +17% | +$130K |
|
|
PPL
989
PPL Corp
PPL
$26.9B
| $855K | ﹤0.01% |
22,395
+7,185
| +47% | +$265K |
|
990
ROBO Global Robotics & Automation Index ETF
ROBO
$1.87B
| $852K | ﹤0.01% |
12,451
+8,849
| +246% | +$650K |
|
991
Kraft Heinz
KHC
$32.8B
| $851K | ﹤0.01% |
37,854
-12,875
| -25% | -$303K |
|
992
Vanguard FTSE Pacific ETF
VPL
$7.77B
| $850K | ﹤0.01% |
8,700
-422
| -5% | -$42.1K |
|
993
Apollo Global Management
APO
$69B
| $847K | ﹤0.01% |
7,598
-6,734
| -47% | -$835K |
|
994
iShares 7-10 Year Treasury Bond ETF
IEF
$47.2B
| $835K | ﹤0.01% |
8,751
-1,880
| -18% | -$181K |
|
995
GSK
GSK
$107B
| $833K | ﹤0.01% |
15,093
-917
| -6% | -$49.7K |
|
996
Merit Medical Systems
MMSI
$4.82B
| $831K | ﹤0.01% |
12,059
-122
| -1% | -$9.53K |
|
997
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.33B
| $830K | ﹤0.01% |
12,969
+2,133
| +20% | +$139K |
|
998
iShares US Healthcare ETF
IYH
$3.44B
| $828K | ﹤0.01% |
13,432
+1,522
| +13% | +$98.3K |
|
999
Essential Utilities
WTRG
$11.5B
| $825K | ﹤0.01% |
20,477
+411
| +2% | +$16.2K |
|
1000
Loews
L
$24.5B
| $815K | ﹤0.01% |
7,631
-32
| -0.4% | -$3.42K |
|
Similar funds
SAM
VIA
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.