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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
VLUE icon
851
iShares MSCI USA Value Factor ETF
VLUE
$9.44B
$1.15M ﹤0.01%
10,197
-9,888
-49% -$1.04M
UFPI icon
852
UFP Industries
UFPI
$5.19B
$1.15M ﹤0.01%
11,560
-102
-0.9% -$10.3K
SCHV
853
Schwab US Large-Cap Value ETF
SCHV
$16.1B
$1.15M ﹤0.01%
41,506
-164
-0.4% -$4.31K
XLB icon
854
State Street Materials Select Sector SPDR ETF
XLB
$8.66B
$1.14M ﹤0.01%
25,990
-2,938
-10% -$125K
MMSI icon
855
Merit Medical Systems
MMSI
$5.32B
$1.14M ﹤0.01%
12,199
-33
-0.3% -$3.13K
ICF icon
856
iShares Select U.S. REIT ETF
ICF
$2.09B
$1.14M ﹤0.01%
18,645
+16,629
+825% +$1.01M
TER icon
857
Teradyne
TER
$59.3B
$1.14M ﹤0.01%
12,629
-194
-2% -$15.5K
URTH icon
858
iShares MSCI World ETF
URTH
$8.27B
$1.13M ﹤0.01%
6,694
+218
+3% +$34.4K
SPSC icon
859
SPS Commerce
SPSC
$2.64B
$1.13M ﹤0.01%
8,273
+206
+3% +$28.6K
PFF icon
860
iShares Preferred and Income Securities ETF
PFF
$13.3B
$1.12M ﹤0.01%
36,665
+6,191
+20% +$186K
DTD icon
861
WisdomTree US Total Dividend Fund
DTD
$1.69B
$1.12M ﹤0.01%
14,110
– –
DOCN icon
862
DigitalOcean
DOCN
$14.6B
$1.12M ﹤0.01%
39,285
+11,792
+43% +$344K
FLEX icon
863
Flex
FLEX
$44.8B
$1.12M ﹤0.01%
22,378
+9,435
+73% +$368K
CLX icon
864
Clorox
CLX
$12.7B
$1.11M ﹤0.01%
9,270
+74
+0.8% +$9.87K
VTES icon
865
Vanguard Short-Term Tax-Exempt Bond ETF
VTES
$2.08B
$1.11M ﹤0.01%
+11,014
New +$1.1M
NNE
866
Nano Nuclear Energy
NNE
$1.01B
$1.1M ﹤0.01%
31,860
– –
HUM icon
867
Humana
HUM
$46.2B
$1.1M ﹤0.01%
4,494
-120
-3% -$29.9K
SCHM icon
868
Schwab US Mid-Cap ETF
SCHM
$15.1B
$1.09M ﹤0.01%
38,962
+21,733
+126% +$573K
ITGR icon
869
Integer Holdings
ITGR
$4.26B
$1.09M ﹤0.01%
8,884
+1,854
+26% +$221K
HIG icon
870
Hartford Financial Services
HIG
$39.3B
$1.09M ﹤0.01%
8,610
+936
+12% +$116K
CRS icon
871
Carpenter Technology
CRS
$28.4B
$1.09M ﹤0.01%
3,950
-150
-4% -$32.7K
CIVB icon
872
Civista Bancshares
CIVB
$589M
$1.09M ﹤0.01%
47,000
-1,200
-2% -$26.1K
UEC icon
873
Uranium Energy
UEC
$5.57B
$1.09M ﹤0.01%
160,200
+1,700
+1% +$9.53K
OWL icon
874
Blue Owl Capital
OWL
$18.5B
$1.09M ﹤0.01%
56,647
-825
-1% -$15.3K
DV icon
875
DoubleVerify
DV
$2.03B
$1.09M ﹤0.01%
72,604
-1,012
-1% -$13.9K
33 34
35
36 37

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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.