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
GDXJ icon
801
VanEck Junior Gold Miners ETF
GDXJ
$6.86B
$1.59M ﹤0.01%
13,232
-93
-0.7% -$12.1K
CLX icon
802
Clorox
CLX
$12B
$1.59M ﹤0.01%
15,306
+5,107
+50% +$579K
IJJ icon
803
iShares S&P Mid-Cap 400 Value ETF
IJJ
$8.83B
$1.58M ﹤0.01%
11,960
-1,931
-14% -$264K
RSPT icon
804
Invesco S&P 500 Equal Weight Technology ETF
RSPT
$5.31B
$1.58M ﹤0.01%
34,881
– –
DRI icon
805
Darden Restaurants
DRI
$24.3B
$1.57M ﹤0.01%
7,984
+344
+5% +$70.7K
AVB icon
806
AvalonBay Communities
AVB
$27.5B
$1.56M ﹤0.01%
9,567
+850
+10% +$149K
VONE icon
807
Vanguard Russell 1000 ETF
VONE
$8.09B
$1.56M ﹤0.01%
5,292
+640
+14% +$197K
F icon
808
Ford
F
$60.9B
$1.56M ﹤0.01%
134,871
-644
-0.5% -$8.48K
FA icon
809
First Advantage
FA
$3.69B
$1.56M ﹤0.01%
132,249
-580
-0.4% -$7.09K
ICFI icon
810
ICF International
ICFI
$1.5B
$1.55M ﹤0.01%
+23,784
New +$1.93M
FICO icon
811
Fair Isaac
FICO
$31.8B
$1.55M ﹤0.01%
1,454
-1,810
-55% -$2.48M
ALGN icon
812
Align Technology
ALGN
$12.9B
$1.55M ﹤0.01%
9,052
-10,180
-53% -$1.78M
EEMA icon
813
iShares MSCI Emerging Markets Asia ETF
EEMA
$800M
$1.54M ﹤0.01%
16,084
+1,316
+9% +$132K
DNTH icon
814
Dianthus Therapeutics
DNTH
$5.69B
$1.53M ﹤0.01%
18,281
+356
+2% +$20.6K
IYF icon
815
iShares US Financials ETF
IYF
$4.65B
$1.53M ﹤0.01%
12,989
+9
+0.1% +$1.12K
MINT icon
816
PIMCO Enhanced Short Maturity Active Exchange-Traded Fund
MINT
$16.9B
$1.53M ﹤0.01%
15,187
-1,495
-9% -$150K
SPSM icon
817
State Street SPDR Portfolio S&P 600 Small Cap ETF
SPSM
$16.9B
$1.52M ﹤0.01%
31,454
-769
-2% -$38.1K
EXG icon
818
Eaton Vance Tax-Managed Global Diversified Equity Income Fund
EXG
$2.91B
$1.52M ﹤0.01%
175,228
-950
-0.5% -$8.92K
SPYV icon
819
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.2B
$1.52M ﹤0.01%
26,784
-2,977
-10% -$173K
SIVR icon
820
abrdn Physical Silver Shares ETF
SIVR
$3.98B
$1.51M ﹤0.01%
21,112
+13,676
+184% +$1.09M
ORI icon
821
Old Republic International
ORI
$10.9B
$1.51M ﹤0.01%
37,799
+1,605
+4% +$66K
RBRK icon
822
Rubrik
RBRK
$14.8B
$1.5M ﹤0.01%
30,665
+22,640
+282% +$1.3M
CRSP icon
823
CRISPR Therapeutics
CRSP
$4.69B
$1.5M ﹤0.01%
31,546
-1,878
-6% -$99.1K
HHS icon
824
Harte-Hanks
HHS
$16.4M
$1.5M ﹤0.01%
660,845
– –
CRDF icon
825
Cardiff Oncology
CRDF
$63M
$1.49M ﹤0.01%
922,407
-1,026,440
-53% -$2.11M
31 32
33
34 35

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.