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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 | |
|---|---|---|---|---|---|---|
1401
Duluth Holdings
DLTH
$152M
| $236K | ﹤0.01% |
113,510
| – | – |
|
1402
EPR Properties
EPR
$4.76B
| $236K | ﹤0.01% |
+4,724
| New | +$246K |
|
1403
Schwab Fundamental US Small Company Index ETF
FNDA
$9.43B
| $235K | ﹤0.01% |
7,471
+269
| +4% | +$8.39K |
|
1404
First Trust NASDAQ Technology Dividend Index Fund
TDIV
$4.48B
| $234K | ﹤0.01% |
2,416
-101
| -4% | -$9.93K |
|
1405
Energy Vault
NRGV
$694M
| $234K | ﹤0.01% |
+50,700
| New | +$194K |
|
1406
KB Home
KBH
$3.46B
| $233K | ﹤0.01% |
4,135
+35
| +0.9% | +$2.15K |
|
1407
Commault Systems
CVLT
$5.99B
| $233K | ﹤0.01% |
1,856
-1,641
| -47% | -$231K |
|
1408
Quaker Houghton
KWR
$2.95B
| $231K | ﹤0.01% |
+1,682
| New | +$227K |
|
1409
ProShares Ultra QQQ
QLD
$14.4B
| $230K | ﹤0.01% |
3,272
| – | – |
|
1410
Zscaler
ZS
$29.1B
| $230K | ﹤0.01% |
1,024
-1,441
| -58% | -$407K |
|
1411
Edison International
EIX
$27.5B
| $229K | ﹤0.01% |
+3,815
| New | +$219K |
|
1412
Credicorp
BAP
$29.7B
| $228K | ﹤0.01% |
796
-137
| -15% | -$36.3K |
|
1413
Principal Financial Group
PFG
$24.4B
| $228K | ﹤0.01% |
2,590
-478
| -16% | -$40.3K |
|
1414
Omega Healthcare
OHI
$14B
| $228K | ﹤0.01% |
+5,131
| New | +$221K |
|
|
NOVTU
1415
Novanta Inc Units
NOVTU
$766M
| $226K | ﹤0.01% |
+4,116
| New | +$217K |
|
1416
RELX
RELX
$59.2B
| $225K | ﹤0.01% |
+5,578
| New | +$238K |
|
1417
Riot Platforms
RIOT
$7.54B
| $224K | ﹤0.01% |
17,685
-3,065
| -15% | -$52.4K |
|
1418
Piper Sandler
PIPR
$5.34B
| $223K | ﹤0.01% |
2,628
| – | – |
|
1419
Healthpeak Properties
DOC
$14.3B
| $223K | ﹤0.01% |
13,848
-699
| -5% | -$12.3K |
|
1420
Invesco Variable Rate Investment Grade ETF
VRIG
$1.85B
| $223K | ﹤0.01% |
8,871
+476
| +6% | +$12K |
|
1421
Shift4
FOUR
$3.63B
| $222K | ﹤0.01% |
3,532
-3,343
| -49% | -$236K |
|
1422
Nextpower Inc
NXT
$15.9B
| $222K | ﹤0.01% |
2,548
-1,921
| -43% | -$174K |
|
|
CHYM
1423
Chime Financial
CHYM
$12.1B
| $222K | ﹤0.01% |
+8,809
| New | +$187K |
|
1424
State Street SPDR S&P 400 Mid Cap Value ETF
MDYV
$2.88B
| $221K | ﹤0.01% |
2,608
-33
| -1% | -$2.76K |
|
1425
Knight Transportation
KNX
$11.9B
| $220K | ﹤0.01% |
+4,215
| New | +$198K |
|
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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.