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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
(+8.6%)
Cap. Flow
-$222M
Cap. Flow
% of AUM
-0.62%
Top 10 Holdings %
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
GE Vernova
GEV
|
+$116M |
| 2 |
Boeing
BA
|
+$34M |
| 3 |
CWAN
Clearwater Analytics
CWAN
|
+$31.2M |
| 4 |
NVIDIA
NVDA
|
+$27.5M |
| 5 |
Cloudflare
NET
|
+$26.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
XYZ
Block Inc
XYZ
|
+$79.4M |
| 2 |
Zoetis
ZTS
|
+$41.3M |
| 3 |
Accenture
ACN
|
+$40.8M |
| 4 |
iShares Core S&P Mid-Cap ETF
IJH
|
+$40.7M |
| 5 |
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 | |
|---|---|---|---|---|---|---|
976
Clearway Energy Class C
CWEN
$6.7B
| $741K | ﹤0.01% |
23,162
-148
| -0.6% | -$4.42K |
|
977
AerCap
AER
$23.8B
| $741K | ﹤0.01% |
6,334
+45
| +0.7% | +$4.87K |
|
978
Blue Owl Capital
OBDC
$5.74B
| $741K | ﹤0.01% |
51,674
+6,500
| +14% | +$92.3K |
|
979
EnerSys
ENS
$6.99B
| $732K | ﹤0.01% |
8,537
-790
| -8% | -$68.9K |
|
|
KRMN
980
Karman Holdings
KRMN
$7.72B
| $726K | ﹤0.01% |
+14,410
| New | +$580K |
|
981
Alarm.com
ALRM
$2.85B
| $722K | ﹤0.01% |
12,762
+290
| +2% | +$16.1K |
|
982
DT Midstream
DTM
$13.4B
| $722K | ﹤0.01% |
6,568
+63
| +1% | +$6.38K |
|
983
Assurant
AIZ
$14.3B
| $721K | ﹤0.01% |
3,651
-503
| -12% | -$98.8K |
|
984
Impact Shares NAACP Minority Empowerment ETF
NACP
$76.8M
| $718K | ﹤0.01% |
16,420
-388
| -2% | -$15.7K |
|
985
State Street SPDR S&P Semiconductor ETF
XSD
$3.04B
| $716K | ﹤0.01% |
2,793
+12
| +0.4% | +$2.58K |
|
986
State Street Real Estate Select Sector SPDR ETF
XLRE
$8.59B
| $716K | ﹤0.01% |
17,293
-16,764
| -49% | -$688K |
|
987
Loews
L
$23.6B
| $715K | ﹤0.01% |
7,801
| – | – |
|
988
Sprott Physical Silver Trust
PSLV
$13.2B
| $712K | ﹤0.01% |
58,166
-7,825
| -12% | -$88.6K |
|
989
iShares MSCI Global Min Vol Factor ETF
ACWV
$3.38B
| $712K | ﹤0.01% |
6,001
| – | – |
|
990
PIMCO 25+ Year Zero Coupon US Treasury Index Exchange-Traded Fund
ZROZ
$1.28B
| $706K | ﹤0.01% |
10,527
-3,462
| -25% | -$229K |
|
991
Lattice Semiconductor
LSCC
$18.5B
| $706K | ﹤0.01% |
14,407
-2,335
| -14% | -$112K |
|
992
MediaAlpha
MAX
$821M
| $701K | ﹤0.01% |
64,007
-130
| -0.2% | -$1.25K |
|
993
Comfort Systems
FIX
$59.6B
| $697K | ﹤0.01% |
+1,300
| New | +$566K |
|
994
W.R. Berkley
WRB
$26.6B
| $691K | ﹤0.01% |
9,409
+319
| +4% | +$22.9K |
|
995
Citizens Financial Group
CFG
$30.6B
| $690K | ﹤0.01% |
15,411
+819
| +6% | +$32.2K |
|
996
Schwab Fundamental US Large Company Index ETF
FNDX
$27.3B
| $689K | ﹤0.01% |
28,057
+744
| +3% | +$17.3K |
|
997
MSCI
MSCI
$40.9B
| $687K | ﹤0.01% |
1,192
+197
| +20% | +$109K |
|
998
Cognizant
CTSH
$26B
| $687K | ﹤0.01% |
8,799
-1,363
| -13% | -$104K |
|
999
Dime Commercial Bancshares
DCOM
$1.78B
| $682K | ﹤0.01% |
25,324
| – | – |
|
1000
Deutsche Bank
DB
$71.5B
| $682K | ﹤0.01% |
23,277
+113
| +0.5% | +$2.98K |
|
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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.