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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
VONE icon
1401
Vanguard Russell 1000 ETF
VONE
$8.58B
$211K ﹤0.01%
752
+52
+7% +$13.5K
VOYA icon
1402
Voya Financial
VOYA
$9.19B
$211K ﹤0.01%
+2,974
New +$191K
SVM
1403
Silvercorp Metals
SVM
$2.53B
$211K ﹤0.01%
50,000
– –
USIG icon
1404
iShares Broad USD Investment Grade Corporate Bond ETF
USIG
$17.3B
$210K ﹤0.01%
4,085
-548
-12% -$27.7K
NICE icon
1405
Nice
NICE
$5.97B
$210K ﹤0.01%
+1,244
New +$200K
MTH icon
1406
Meritage Homes
MTH
$4.86B
$210K ﹤0.01%
+3,130
New +$207K
KMPR icon
1407
Kemper
KMPR
$1.68B
$209K ﹤0.01%
3,245
-4
-0.1% -$248
DVA icon
1408
DaVita
DVA
$11.7B
$209K ﹤0.01%
1,464
-187
-11% -$26.5K
HEEM icon
1409
iShares Currency Hedged MSCI Emerging Markets
HEEM
$282M
$207K ﹤0.01%
6,880
-6,127
-47% -$173K
ANF icon
1410
Abercrombie & Fitch
ANF
$5B
$207K ﹤0.01%
+2,499
New +$190K
BY icon
1411
Byline Bancorp
BY
$1.76B
$206K ﹤0.01%
+7,723
New +$198K
HST icon
1412
Host Hotels & Resorts
HST
$16B
$206K ﹤0.01%
+13,422
New +$199K
EXPE icon
1413
Expedia Group
EXPE
$37.3B
$204K ﹤0.01%
1,212
+22
+2% +$3.57K
RSPH icon
1414
Invesco S&P 500 Equal Weight Health Care ETF
RSPH
$784M
$204K ﹤0.01%
7,000
– –
QUS icon
1415
State Street SPDR MSCI USA StrategicFactors ETF
QUS
$1.58B
$204K ﹤0.01%
1,251
+94
+8% +$14.6K
ODD icon
1416
ODDITY Tech
ODD
$651M
$204K ﹤0.01%
+2,700
New +$165K
FLYW icon
1417
Flywire
FLYW
$2.16B
$204K ﹤0.01%
17,407
-133,682
-88% -$1.36M
DLTH icon
1418
Duluth Holdings
DLTH
$159M
$203K ﹤0.01%
96,832
– –
SRAD icon
1419
Sportradar
SRAD
$3.85B
$201K ﹤0.01%
+7,175
New +$170K
ALMS
1420
Alumis Inc
ALMS
$3.52B
$200K ﹤0.01%
+66,719
New +$315K
BXMT icon
1421
Blackstone Mortgage Trust
BXMT
$2.38B
$200K ﹤0.01%
+10,375
New +$197K
BTBT icon
1422
Bit Digital
BTBT
$482M
$197K ﹤0.01%
90,000
– –
TDIV icon
1423
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.44B
$196K ﹤0.01%
2,175
– –
IYG icon
1424
iShares US Financial Services ETF
IYG
$2.2B
$195K ﹤0.01%
2,282
– –
PTLC icon
1425
Pacer Trendpilot US Large Cap ETF
PTLC
$3.38B
$194K ﹤0.01%
3,829
-7,542
-66% -$369K
55 56
57
58 59

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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.