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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 | |
|---|---|---|---|---|---|---|
1126
Horizon Bancorp
HBNC
$1.04B
| $529K | ﹤0.01% |
31,200
| – | – |
|
|
GEW
1127
Cambria Global EW ETF
GEW
$146M
| $527K | ﹤0.01% |
10,250
| – | – |
|
1128
Jack Henry & Associates
JKHY
$11B
| $526K | ﹤0.01% |
2,883
-42
| -1% | -$7K |
|
1129
Fidelity Nasdaq Composite Index ETF
ONEQ
$10.8B
| $525K | ﹤0.01% |
5,748
+154
| +3% | +$14K |
|
1130
Credo Technology Group
CRDO
$44.7B
| $525K | ﹤0.01% |
+3,648
| New | +$561K |
|
1131
Appian
APPN
$2.55B
| $524K | ﹤0.01% |
14,798
+17
| +0.1% | +$606 |
|
1132
JPMorgan Municipal ETF
JMUB
$8.49B
| $522K | ﹤0.01% |
10,341
+1,291
| +14% | +$65.3K |
|
1133
Haleon
HLN
$43.7B
| $522K | ﹤0.01% |
51,642
+3,808
| +8% | +$36.2K |
|
1134
Cognizant
CTSH
$26.3B
| $520K | ﹤0.01% |
6,264
+290
| +5% | +$21.7K |
|
1135
State Street SPDR S&P 400 Mid Cap Growth ETF
MDYG
$2.93B
| $519K | ﹤0.01% |
5,614
+130
| +2% | +$11.9K |
|
1136
Morningstar
MORN
$7.54B
| $518K | ﹤0.01% |
2,384
-301
| -11% | -$65.2K |
|
1137
Vanguard Total International Bond ETF
BNDX
$82.8B
| $518K | ﹤0.01% |
10,716
+5,677
| +113% | +$280K |
|
1138
Evergy
EVRG
$18.9B
| $516K | ﹤0.01% |
7,116
+476
| +7% | +$36.1K |
|
|
EXE
1139
Expand Energy Corp
EXE
$22.6B
| $512K | ﹤0.01% |
+4,637
| New | +$514K |
|
1140
Choiceone Financial
COFS
$508M
| $510K | ﹤0.01% |
+17,275
| New | +$511K |
|
1141
Liberty Media Series C
FWONK
$25.8B
| $510K | ﹤0.01% |
5,175
+135
| +3% | +$13.3K |
|
|
AII
1142
American Integrity Insurance
AII
$403M
| $508K | ﹤0.01% |
24,400
+4,900
| +25% | +$109K |
|
1143
Sprout Social
SPT
$609M
| $508K | ﹤0.01% |
45,095
-81,690
| -64% | -$882K |
|
1144
Vanguard Consumer Discretionary ETF
VCR
$6.16B
| $508K | ﹤0.01% |
1,289
-370
| -22% | -$145K |
|
1145
iShares MSCI EAFE Min Vol Factor ETF
EFAV
$5.48B
| $506K | ﹤0.01% |
5,869
-313
| -5% | -$26.8K |
|
1146
Brookfield Renewable
BEP
$9.8B
| $503K | ﹤0.01% |
18,657
+8
| +0% | +$227 |
|
1147
Goosehead Insurance
GSHD
$2.29B
| $503K | ﹤0.01% |
6,831
+323
| +5% | +$23K |
|
1148
abrdn Physical Silver Shares ETF
SIVR
$4.56B
| $503K | ﹤0.01% |
+7,436
| New | +$391K |
|
1149
Southwest Airlines
LUV
$22B
| $502K | ﹤0.01% |
12,138
-317
| -3% | -$11.1K |
|
1150
iShares US Industrials ETF
IYJ
$1.94B
| $501K | ﹤0.01% |
3,383
-728
| -18% | -$106K |
|
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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.