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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
+1.73%
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
$37.3B
AUM Growth
-$310M
(-0.82%)
Cap. Flow
-$212M
Cap. Flow
% of AUM
-0.57%
Top 10 Holdings %
Top 10 Hldgs %
27.41%
Holding
1,963
New
120
Increased
759
Reduced
753
Closed
96
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
BWX Technologies
BWXT
|
+$46.6M |
| 2 |
Meta Platforms (Facebook)
META
|
+$38.3M |
| 3 |
ServiceNow
NOW
|
+$37.6M |
| 4 |
Vanguard FTSE All-World ex-US ETF
VEU
|
+$32.4M |
| 5 |
SPDR Gold Trust
GLD
|
+$29.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
FISV
Fiserv Inc
FISV
|
+$114M |
| 2 |
CoStar Group
CSGP
|
+$78.3M |
| 3 |
CWAN
Clearwater Analytics
CWAN
|
+$75.3M |
| 4 |
Pool Corp
POOL
|
+$54M |
| 5 |
Zoetis
ZTS
|
+$51.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 25.8% |
| 2 | Financials | 13.4% |
| 3 | Industrials | 12.04% |
| 4 | Healthcare | 11.22% |
| 5 | Communication Services | 7.63% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1376
CNB Financial Corp
CCNE
$1.02B
| $249K | ﹤0.01% |
9,530
+7
| +0.1% | +$178 |
|
1377
iShares MSCI Austria ETF
EWO
$185M
| $248K | ﹤0.01% |
7,000
-1,000
| -13% | -$32.4K |
|
1378
ING
ING
$101B
| $248K | ﹤0.01% |
+8,859
| New | +$228K |
|
1379
Las Vegas Sands
LVS
$29.4B
| $247K | ﹤0.01% |
+3,800
| New | +$233K |
|
1380
Cheniere Energy
CQP
$32.6B
| $246K | ﹤0.01% |
4,600
| – | – |
|
1381
DNOW Inc
DNOW
$3.01B
| $246K | ﹤0.01% |
+18,534
| New | +$260K |
|
1382
Sprott Gold Miners ETF
SGDM
$661M
| $245K | ﹤0.01% |
3,520
+20
| +0.6% | +$1.29K |
|
1383
Alcoa
AA
$13.6B
| $245K | ﹤0.01% |
+4,606
| New | +$188K |
|
|
TERN
1384
DELISTED
Terns Pharmaceuticals
TERN
| $244K | ﹤0.01% |
+6,050
| New | +$140K |
|
1385
Lindsay Corp
LNN
$1.17B
| $244K | ﹤0.01% |
+2,072
| New | +$249K |
|
1386
MGE Energy Inc
MGEE
$3.04B
| $243K | ﹤0.01% |
3,100
-900
| -23% | -$74K |
|
1387
Standex International
SXI
$3.98B
| $243K | ﹤0.01% |
+1,118
| New | +$259K |
|
|
CMA
1388
DELISTED
Comerica
CMA
| $243K | ﹤0.01% |
+2,790
| New | +$225K |
|
1389
WisdomTree US AI Enhanced Value Fund
AIVL
$435M
| $242K | ﹤0.01% |
2,103
| – | – |
|
1390
Arcosa
ACA
$7.11B
| $241K | ﹤0.01% |
+2,271
| New | +$229K |
|
1391
American States Water
AWR
$3.43B
| $241K | ﹤0.01% |
3,322
+18
| +0.5% | +$1.32K |
|
1392
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$14.1B
| $240K | ﹤0.01% |
2,910
+1,197
| +70% | +$97.9K |
|
1393
SM Energy
SM
$7.55B
| $240K | ﹤0.01% |
12,829
+72
| +0.6% | +$1.46K |
|
1394
iShares Currency Hedged MSCI Emerging Markets
HEEM
$286M
| $239K | ﹤0.01% |
6,880
| – | – |
|
1395
Oceaneering
OII
$5.09B
| $239K | ﹤0.01% |
9,930
-34
| -0.3% | -$821 |
|
1396
ONE Gas
OGS
$4.96B
| $238K | ﹤0.01% |
3,086
-157
| -5% | -$12.6K |
|
1397
Canadian Imperial Bank of Commerce
CM
$109B
| $238K | ﹤0.01% |
2,628
-741
| -22% | -$63.6K |
|
1398
Lithia Motors
LAD
$8.35B
| $238K | ﹤0.01% |
716
+48
| +7% | +$15.2K |
|
1399
First Trust Cloud Computing ETF
SKYY
$3.22B
| $237K | ﹤0.01% |
1,824
-713
| -28% | -$95.2K |
|
1400
Western Union
WU
$2.19B
| $237K | ﹤0.01% |
25,440
+4,936
| +24% | +$43.6K |
|
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William Blair & Company's Q4 2025 Portfolio in Review
As of Q4 2025, William Blair & Company held 1,963 positions worth $37.3B, down 0.82% from $37.6B the previous quarter. Its ten largest holdings account for 27% of the portfolio.
William Blair & Company's Q4 2025 filing shows 120 new, 759 increased, 753 reduced and 96 closed positions. Its largest new stake was Wingstop: 90,773 shares worth $21.6M. The largest sale was Fiserv Inc, an estimated $114M.
By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 27% a quarter earlier, followed by Financials and Industrials.
- William Blair & Company's largest Q4 2025 buy was Wingstop: 90,773 shares worth $21.6M.
- William Blair & Company added most to BWX Technologies in Q4 2025, an estimated $46.6M increase.
- William Blair & Company's biggest Q4 2025 reduction was Fiserv Inc, cutting an estimated $114M.
- William Blair & Company fully exited SAP in Q4 2025, selling an estimated $9.19M.
- William Blair & Company's ten largest holdings make up 27% of its $37.3B portfolio in Q4 2025.
- William Blair & Company opened 120 new positions and closed 96 in Q4 2025.
- William Blair & Company's portfolio value fell 0.82% quarter-over-quarter to $37.3B.
Based on William Blair & Company's 13F filing for Q4 2025, filed 17 Feb 2026.