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William Blair & Company Portfolio holdings
AUM
$38.4B
1-Year Est. Return
25.71%
This Fund
S&P 500
This Quarter
Est. Return
+1.73%
1 Year Est. Return
+25.71%
3 Year Est. Return
+88.7%
5 Year Est. Return
+104.53%
10 Year Est. Return
+665.86%
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 | |
|---|---|---|---|---|---|---|
876
Erie Indemnity
ERIE
$13.4B
| $1.25M | ﹤0.01% |
4,375
-607
| -12% | -$181K |
|
877
MGM Resorts International
MGM
$11B
| $1.25M | ﹤0.01% |
34,354
-841
| -2% | -$28.5K |
|
878
Invesco CurrencyShares Euro Currency Trust
FXE
$341M
| $1.25M | ﹤0.01% |
+11,555
| New | +$1.24M |
|
879
State Street SPDR Bloomberg 1-3 Month T-Bill ETF
BIL
$46.7B
| $1.25M | ﹤0.01% |
13,671
-12,982
| -49% | -$1.19M |
|
880
Graco
GGG
$13.6B
| $1.25M | ﹤0.01% |
15,232
-249
| -2% | -$20.5K |
|
881
Hewlett Packard
HPE
$72.4B
| $1.24M | ﹤0.01% |
51,549
-3,084
| -6% | -$72.7K |
|
882
Kraft Heinz
KHC
$29.5B
| $1.23M | ﹤0.01% |
50,729
-4,305
| -8% | -$107K |
|
883
Dell
DELL
$286B
| $1.23M | ﹤0.01% |
9,759
-678
| -6% | -$95.5K |
|
884
iShares iBoxx $ Investment Grade Corporate Bond ETF
LQD
$32.7B
| $1.21M | ﹤0.01% |
11,023
-738
| -6% | -$82.1K |
|
885
American Public Education
APEI
$835M
| $1.21M | ﹤0.01% |
32,028
-1,943
| -6% | -$69.6K |
|
886
Woodward
WWD
$21B
| $1.2M | ﹤0.01% |
3,971
+16
| +0.4% | +$4.4K |
|
887
DigitalOcean
DOCN
$15.1B
| $1.2M | ﹤0.01% |
24,899
+10
| +0% | +$440 |
|
888
WisdomTree US Total Dividend Fund
DTD
$1.69B
| $1.2M | ﹤0.01% |
14,110
| – | – |
|
889
Wells Fargo 7.5% Non Cumv Perp Conv
WFC.PRL
$4.66B
| $1.19M | ﹤0.01% |
985
+200
| +25% | +$246K |
|
|
FFIC
890
DELISTED
Flushing Financial
FFIC
| $1.19M | ﹤0.01% |
78,534
+1
| +0% | +$15 |
|
891
State Street Materials Select Sector SPDR ETF
XLB
$8.72B
| $1.19M | ﹤0.01% |
26,246
+164
| +0.6% | +$7.25K |
|
892
iShares MSCI USA Value Factor ETF
VLUE
$9.45B
| $1.19M | ﹤0.01% |
8,668
+6
| +0.1% | +$787 |
|
893
OGE Energy
OGE
$9.59B
| $1.18M | ﹤0.01% |
27,658
+204
| +0.7% | +$9.1K |
|
894
Schwab US Mid-Cap ETF
SCHM
$15.1B
| $1.18M | ﹤0.01% |
39,256
-210
| -0.5% | -$6.26K |
|
895
Alliant Energy
LNT
$17.7B
| $1.18M | ﹤0.01% |
18,108
+570
| +3% | +$38.2K |
|
896
Vanguard S&P Small-Cap 600 ETF
VIOO
$4.32B
| $1.17M | ﹤0.01% |
10,519
+5,298
| +101% | +$589K |
|
897
Expeditors International
EXPD
$23.1B
| $1.16M | ﹤0.01% |
7,767
-926
| -11% | -$126K |
|
898
Alcon
ALC
$36.6B
| $1.15M | ﹤0.01% |
14,640
+613
| +4% | +$47.2K |
|
|
BKV
899
BKV Corp
BKV
$2.86B
| $1.15M | ﹤0.01% |
+42,345
| New | +$1.06M |
|
900
Fidelity MSCI Information Technology Index ETF
FTEC
$21.1B
| $1.14M | ﹤0.01% |
5,060
-106
| -2% | -$24K |
|
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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.