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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 | |
|---|---|---|---|---|---|---|
1176
State Street SPDR Portfolio High Yield Bond ETF
SPHY
$11.5B
| $466K | ﹤0.01% |
19,973
+175
| +0.9% | +$4.13K |
|
1177
EastGroup Properties
EGP
$11.2B
| $464K | ﹤0.01% |
+2,507
| New | +$468K |
|
1178
Pan American Silver
PAAS
$17.9B
| $463K | ﹤0.01% |
8,483
-5,303
| -38% | -$306K |
|
1179
AptarGroup
ATR
$8.69B
| $463K | ﹤0.01% |
3,674
-7,159
| -66% | -$933K |
|
1180
First Community Corp
FCCO
$327M
| $457K | ﹤0.01% |
15,627
+6
| +0% | +$176 |
|
1181
WisdomTree US MidCap Fund
EZM
$939M
| $457K | ﹤0.01% |
6,792
| – | – |
|
1182
Global X S&P 500 Covered Call ETF
XYLD
$3.19B
| $455K | ﹤0.01% |
11,636
+495
| +4% | +$20K |
|
1183
Lincoln Electric
LECO
$14.1B
| $454K | ﹤0.01% |
1,825
-169
| -8% | -$45.2K |
|
1184
Trade Desk
TTD
$8.97B
| $454K | ﹤0.01% |
20,020
-6,680
| -25% | -$193K |
|
1185
Vontier
VNT
$4.54B
| $453K | ﹤0.01% |
12,761
+510
| +4% | +$19.6K |
|
1186
ProShares Ultra Financials
UYG
$819M
| $449K | ﹤0.01% |
6,115
-25
| -0.4% | -$2.06K |
|
1187
Hims & Hers Health
HIMS
$5.79B
| $447K | ﹤0.01% |
21,539
+32
| +0.1% | +$756 |
|
1188
Nicolet Bankshares
NIC
$3.6B
| $447K | ﹤0.01% |
3,008
+434
| +17% | +$63K |
|
1189
State Street SPDR S&P Semiconductor ETF
XSD
$2.51B
| $446K | ﹤0.01% |
1,366
+573
| +72% | +$198K |
|
1190
First Financial Corp
THFF
$948M
| $445K | ﹤0.01% |
7,041
+38
| +0.5% | +$2.42K |
|
|
THW
1191
abrdn World Healthcare Fund
THW
$534M
| $443K | ﹤0.01% |
38,000
-300
| -0.8% | -$3.74K |
|
1192
Steel Dynamics
STLD
$36.4B
| $442K | ﹤0.01% |
2,458
+173
| +8% | +$31.5K |
|
1193
Corpay
CPAY
$25.7B
| $441K | ﹤0.01% |
1,514
+311
| +26% | +$99.6K |
|
1194
GitLab
GTLB
$5.75B
| $440K | ﹤0.01% |
20,342
-66,038
| -76% | -$1.93M |
|
1195
Hexcel
HXL
$7.97B
| $439K | ﹤0.01% |
5,425
-143
| -3% | -$12K |
|
1196
Principal Exchange-Traded Funds Principal US Mega-Cap ETF
USMC
$3.48B
| $438K | ﹤0.01% |
6,805
| – | – |
|
1197
Petrobras
PBR
$120B
| $437K | ﹤0.01% |
21,039
+10,178
| +94% | +$163K |
|
1198
Elanco Animal Health
ELAN
$13.2B
| $435K | ﹤0.01% |
18,165
+1,291
| +8% | +$31.6K |
|
1199
Rambus
RMBS
$8.95B
| $427K | ﹤0.01% |
4,960
-95
| -2% | -$9.48K |
|
1200
Innovator US Equity Buffer ETF October
BOCT
$281M
| $425K | ﹤0.01% |
8,857
| – | – |
|
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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.