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
NVO
626
Novo Nordisk
NVO
$209B
$2.98M 0.01%
43,200
-5,819
-12% -$396K
BIL icon
627
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$46.9B
$2.98M 0.01%
32,474
+9,879
+44% +$905K
DEO icon
628
Diageo
DEO
$53.6B
$2.95M 0.01%
29,231
-96
-0.3% -$10.4K
AKAM icon
629
Akamai
AKAM
$15.9B
$2.83M 0.01%
35,473
-10,153
-22% -$789K
CCC
630
CCC Intelligent Solutions
CCC
$4.08B
$2.83M 0.01%
300,672
-20,317
-6% -$182K
MGV icon
631
Vanguard Morningstar Mega Cap Value ETF
MGV
$13.5B
$2.83M 0.01%
21,551
+4,840
+29% +$607K
EPI icon
632
WisdomTree India Earnings Fund ETF
EPI
$2.06B
$2.82M 0.01%
59,490
+3,870
+7% +$176K
KAUG
633
Innovator U.S. Small Cap Power Buffer ETF - August
KAUG
$60M
$2.8M 0.01%
112,830
-445
-0.4% -$10.7K
PSN icon
634
Parsons
PSN
$5.08B
$2.8M 0.01%
39,040
-125,321
-76% -$8.28M
ARM icon
635
Arm
ARM
$302B
$2.8M 0.01%
17,317
-71,119
-80% -$8.83M
PRAA icon
636
PRA Group
PRAA
$755M
$2.8M 0.01%
189,818
+14,069
+8% +$224K
SRE icon
637
Sempra
SRE
$54.8B
$2.79M 0.01%
36,853
+2,006
+6% +$149K
ED icon
638
Consolidated Edison
ED
$39.9B
$2.79M 0.01%
27,823
+718
+3% +$76K
VDE icon
639
Vanguard Energy ETF
VDE
$9.74B
$2.78M 0.01%
23,361
-3,823
-14% -$445K
CAG icon
640
Conagra Brands
CAG
$7.23B
$2.78M 0.01%
135,602
+91,106
+205% +$2.13M
IJK icon
641
iShares S&P Mid-Cap 400 Growth ETF
IJK
$11.2B
$2.72M 0.01%
29,865
-2,770
-8% -$237K
HAL icon
642
Halliburton
HAL
$26.6B
$2.72M 0.01%
133,306
+14,241
+12% +$299K
PEN icon
643
Penumbra
PEN
$12.8B
$2.71M 0.01%
10,564
+4,042
+62% +$1.1M
PDP icon
644
Invesco Dorsey Wright Momentum ETF
PDP
$1.5B
$2.71M 0.01%
24,920
-1,350
-5% -$138K
BIDU icon
645
Baidu
BIDU
$37.2B
$2.7M 0.01%
31,442
+1,083
+4% +$93.5K
TMUS icon
646
T-Mobile US
TMUS
$190B
$2.68M 0.01%
11,239
+970
+9% +$237K
HEI.A icon
647
HEICO Corp Class A
HEI.A
$37.2B
$2.66M 0.01%
10,265
+1,216
+13% +$266K
SPG icon
648
Simon Property Group
SPG
$72.3B
$2.66M 0.01%
16,521
-4,107
-20% -$649K
FA icon
649
First Advantage
FA
$4.12B
$2.64M 0.01%
159,068
-15,617
-9% -$252K
DSI icon
650
iShares MSCI KLD 400 Social ETF
DSI
$5.55B
$2.64M 0.01%
22,689
-301
-1% -$32.1K
24 25
26
27 28

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.