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
ACI icon
1351
Albertsons Companies
ACI
$5.91B
$288K ﹤0.01%
16,873
+426
+3% +$7.39K
MCY icon
1352
Mercury Insurance
MCY
$6B
$287K ﹤0.01%
3,251
– –
BIPC icon
1353
Brookfield Infrastructure
BIPC
$5.32B
$286K ﹤0.01%
7,232
+1,575
+28% +$72.2K
BF.B icon
1354
Brown-Forman Class B
BF.B
$13.5B
$285K ﹤0.01%
10,798
-3,919
-27% -$105K
YPF icon
1355
YPF
YPF
$19.7B
$284K ﹤0.01%
+6,150
New +$233K
PINS icon
1356
Pinterest
PINS
$13.7B
$284K ﹤0.01%
15,470
-518
-3% -$10.8K
ITB icon
1357
iShares US Home Construction ETF
ITB
$2.32B
$283K ﹤0.01%
3,120
+2,555
+452% +$261K
BALL icon
1358
Ball Corp
BALL
$17.5B
$281K ﹤0.01%
+4,762
New +$290K
RPRX icon
1359
Royalty Pharma
RPRX
$26.2B
$281K ﹤0.01%
+5,866
New +$257K
ICVT icon
1360
iShares Convertible Bond ETF
ICVT
$6.97B
$281K ﹤0.01%
2,762
-195
-7% -$20.2K
OTF
1361
Blue Owl Technology Finance Corp
OTF
$4.6B
$280K ﹤0.01%
22,616
+7,809
+53% +$99.5K
DBA icon
1362
Invesco DB Agriculture Fund
DBA
$1.23B
$280K ﹤0.01%
10,241
– –
KOS icon
1363
Kosmos Energy
KOS
$1.47B
$278K ﹤0.01%
100,069
+69
+0.1% +$130
GDDY icon
1364
GoDaddy
GDDY
$13.9B
$278K ﹤0.01%
3,363
-2,978
-47% -$283K
FELE icon
1365
Franklin Electric
FELE
$4.66B
$277K ﹤0.01%
3,007
-59
-2% -$5.79K
CCNE icon
1366
CNB Financial Corp
CCNE
$1.05B
$277K ﹤0.01%
9,558
+28
+0.3% +$782
DLTR icon
1367
Dollar Tree
DLTR
$24.8B
$276K ﹤0.01%
2,524
-4,121
-62% -$503K
CNO icon
1368
CNO Financial Group
CNO
$4.94B
$276K ﹤0.01%
6,711
-50
-0.7% -$2.09K
SWK icon
1369
Stanley Black & Decker
SWK
$14.5B
$275K ﹤0.01%
3,867
-221
-5% -$17.8K
PNFP icon
1370
Pinnacle Financial Partners Inc
PNFP
$15.8B
$272K ﹤0.01%
+3,158
New +$294K
KRE icon
1371
State Street SPDR S&P Regional Banking ETF
KRE
$4.51B
$272K ﹤0.01%
4,175
-4,845
-54% -$327K
M icon
1372
Macy's
M
$6.51B
$270K ﹤0.01%
14,931
+95
+0.6% +$1.92K
NCLH icon
1373
Norwegian Cruise Line
NCLH
$9.53B
$270K ﹤0.01%
14,422
-57,735
-80% -$1.26M
INSP icon
1374
Inspire Medical Systems
INSP
$1.47B
$268K ﹤0.01%
5,189
+457
+10% +$32K
SMCI icon
1375
Super Micro Computer
SMCI
$16.6B
$267K ﹤0.01%
11,712
+2,189
+23% +$65.7K
53 54
55
56 57

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.