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
+12.61%
1 Year Est. Return
+18.88%
3 Year Est. Return
+73.84%
5 Year Est. Return
+90.13%
10 Year Est. Return
+563.35%
AUM
$36B
AUM Growth
+$2.85B
Cap. Flow
-$222M
Cap. Flow %
-0.62%
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87

Top Buys

Rank Stock Value
1
GEV icon
GE Vernova
GEV
+$116M
2
BA icon
Boeing
BA
+$34M
3
CWAN
Clearwater Analytics
CWAN
+$31.2M
4
NVDA icon
NVIDIA
NVDA
+$27.5M
5
NET icon
Cloudflare
NET
+$26.2M

Top Sells

Rank Stock Value
1
XYZ
Block Inc
XYZ
+$79.4M
2
ZTS icon
Zoetis
ZTS
+$41.3M
3
ACN icon
Accenture
ACN
+$40.8M
4
IJH icon
iShares Core S&P Mid-Cap ETF
IJH
+$40.7M
5
UNH icon
UnitedHealth
UNH
+$36.4M

Sector Composition

Rank Sector Weight
1 Technology 27.47%
2 Financials 13.92%
3 Industrials 12.94%
4 Healthcare 11.51%
5 Consumer Discretionary 7.98%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
FWONK icon
1026
Liberty Media Series C
FWONK
$25.8B
$629K ﹤0.01%
6,016
+118
+2% +$11K
JHMM icon
1027
John Hancock Multifactor Mid Cap ETF
JHMM
$6.12B
$627K ﹤0.01%
10,265
+22
+0.2% +$1.27K
MUFG icon
1028
Mitsubishi UFJ Financial
MUFG
$254B
$626K ﹤0.01%
45,603
-412
-0.9% -$5.33K
RIVN icon
1029
Rivian
RIVN
$23.2B
$619K ﹤0.01%
45,076
+3,909
+9% +$53K
ISTB icon
1030
iShares Core 1-5 Year USD Bond ETF
ISTB
$5.13B
$617K ﹤0.01%
12,685
-1,441
-10% -$69.5K
XT icon
1031
iShares Future Exponential Technologies ETF
XT
$3.97B
$617K ﹤0.01%
9,452
-402
-4% -$24K
IXN icon
1032
iShares Global Tech ETF
IXN
$8.83B
$614K ﹤0.01%
6,645
+1,728
+35% +$140K
JBTM
1033
JBT Marel
JBTM
$6.39B
$613K ﹤0.01%
5,094
-3,001
-37% -$335K
EVRG icon
1034
Evergy
EVRG
$19.2B
$608K ﹤0.01%
8,826
-117
-1% -$7.86K
IEI icon
1035
iShares 3-7 Year Treasury Bond ETF
IEI
$17.8B
$608K ﹤0.01%
5,106
-1,012
-17% -$119K
RVTY icon
1036
Revvity
RVTY
$12.8B
$607K ﹤0.01%
6,278
+50
+0.8% +$4.71K
CRWV
1037
CoreWeave
CRWV
$49.5B
$606K ﹤0.01%
+3,716
New +$343K
IGM icon
1038
iShares Expanded Tech Sector ETF
IGM
$10.7B
$605K ﹤0.01%
5,387
+2,913
+118% +$286K
FLG
1039
Flagstar Bank National Association
FLG
$5.82B
$604K ﹤0.01%
56,956
– –
JBHT icon
1040
JB Hunt Transport Services
JBHT
$25.2B
$602K ﹤0.01%
4,191
-410
-9% -$56.7K
MOO icon
1041
VanEck Agribusiness ETF
MOO
$969M
$602K ﹤0.01%
8,173
+300
+4% +$21K
CCL icon
1042
Carnival Corporation Ltd
CCL
$39.7B
$601K ﹤0.01%
21,387
-830
-4% -$17.8K
INSP icon
1043
Inspire Medical Systems
INSP
$1.74B
$601K ﹤0.01%
4,631
– –
FTCS icon
1044
First Trust Capital Strength ETF
FTCS
$7.95B
$600K ﹤0.01%
6,604
– –
EME icon
1045
Emcor
EME
$36B
$599K ﹤0.01%
1,119
-588
-34% -$259K
ILCG icon
1046
iShares Morningstar Growth ETF
ILCG
$3.27B
$596K ﹤0.01%
6,151
+14
+0.2% +$1.22K
UYG icon
1047
ProShares Ultra Financials
UYG
$847M
$587K ﹤0.01%
6,140
– –
NBIX icon
1048
Neurocrine Biosciences
NBIX
$16.6B
$586K ﹤0.01%
4,664
-1,550
-25% -$178K
DECK icon
1049
Deckers Outdoor
DECK
$13.3B
$584K ﹤0.01%
5,668
-102
-2% -$11.3K
IYJ icon
1050
iShares US Industrials ETF
IYJ
$2.02B
$583K ﹤0.01%
4,097
-180
-4% -$24K
40 41
42
43 44

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 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
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return

William Blair & Company's Q2 2025 Portfolio in Review

As of Q2 2025, William Blair & Company held 1,911 positions worth $36B, up 8.6% from $33.2B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company's Q2 2025 filing shows 111 new, 662 increased, 757 reduced and 87 closed positions. Its largest new stake was Affirm: 304,959 shares worth $21.1M. The largest sale was Block Inc, an estimated $79.4M.

By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Financials and Industrials.

  • William Blair & Company's largest Q2 2025 buy was Affirm: 304,959 shares worth $21.1M.
  • William Blair & Company added most to GE Vernova in Q2 2025, an estimated $116M increase.
  • William Blair & Company's biggest Q2 2025 reduction was Block Inc, cutting an estimated $79.4M.
  • William Blair & Company fully exited Discover Financial Services in Q2 2025, selling an estimated $5.21M.
  • William Blair & Company's ten largest holdings make up 25% of its $36B portfolio in Q2 2025.
  • William Blair & Company opened 111 new positions and closed 87 in Q2 2025.
  • William Blair & Company's portfolio value rose 8.6% quarter-over-quarter to $36B.

Based on William Blair & Company's 13F filing for Q2 2025, filed 24 Jul 2025.