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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 | |
|---|---|---|---|---|---|---|
1201
Pinterest
PINS
$13.8B
| $414K | ﹤0.01% |
15,988
-13,205
| -45% | -$380K |
|
1202
Ameren
AEE
$29.6B
| $414K | ﹤0.01% |
4,144
+674
| +19% | +$69.1K |
|
1203
Applied Digital
APLD
$8.37B
| $413K | ﹤0.01% |
16,859
-4,469
| -21% | -$129K |
|
1204
FirstCash
FCFS
$9.05B
| $413K | ﹤0.01% |
2,592
-25
| -1% | -$3.94K |
|
1205
Hexcel
HXL
$7.63B
| $411K | ﹤0.01% |
5,568
-91
| -2% | -$6.43K |
|
1206
iShares US Consumer Discretionary ETF
IYC
$1.23B
| $410K | ﹤0.01% |
3,974
-1,511
| -28% | -$155K |
|
1207
FirstEnergy
FE
$27.1B
| $405K | ﹤0.01% |
9,048
+830
| +10% | +$38.1K |
|
1208
iShares US Tech Independence Focused ETF
IETC
$715M
| $405K | ﹤0.01% |
+3,987
| New | +$409K |
|
1209
Invesco Senior Loan ETF
BKLN
$6.74B
| $404K | ﹤0.01% |
19,249
-1,198
| -6% | -$25.1K |
|
1210
CDW
CDW
$17.1B
| $403K | ﹤0.01% |
2,962
-4,007
| -57% | -$591K |
|
1211
Masco
MAS
$14.7B
| $402K | ﹤0.01% |
6,333
-366
| -5% | -$23.8K |
|
1212
Greif
GEF
$4.97B
| $400K | ﹤0.01% |
5,904
+6
| +0.1% | +$376 |
|
1213
Triple Flag Precious Metals
TFPM
$6.59B
| $399K | ﹤0.01% |
12,000
| – | – |
|
1214
iShares MSCI Global Gold Miners ETF
RING
$2.45B
| $395K | ﹤0.01% |
5,365
+1,674
| +45% | +$113K |
|
1215
Sea Limited
SE
$70.3B
| $394K | ﹤0.01% |
3,090
+693
| +29% | +$103K |
|
|
PCH
1216
DELISTED
PotlatchDeltic
PCH
| $392K | ﹤0.01% |
+9,860
| New | +$399K |
|
1217
Phillips Edison & Co
PECO
$5.15B
| $392K | ﹤0.01% |
11,011
+276
| +3% | +$9.58K |
|
1218
Unum
UNM
$14.5B
| $391K | ﹤0.01% |
5,051
+53
| +1% | +$4.05K |
|
1219
Zions Bancorporation
ZION
$10.3B
| $390K | ﹤0.01% |
6,662
-284
| -4% | -$15.5K |
|
1220
Enerpac Tool Group
EPAC
$1.89B
| $389K | ﹤0.01% |
10,160
| – | – |
|
1221
Steel Dynamics
STLD
$38.5B
| $387K | ﹤0.01% |
2,285
+796
| +53% | +$126K |
|
1222
Trip.com Group
TCOM
$29.7B
| $385K | ﹤0.01% |
5,352
+259
| +5% | +$18.5K |
|
1223
T. Rowe Price Dividend Growth ETF
TDVG
$1.45B
| $384K | ﹤0.01% |
8,549
-254
| -3% | -$11.3K |
|
1224
Brown-Forman Class B
BF.B
$12.9B
| $384K | ﹤0.01% |
+14,717
| New | +$414K |
|
1225
Euronet Worldwide
EEFT
$2.65B
| $383K | ﹤0.01% |
5,026
+19
| +0.4% | +$1.48K |
|
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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.