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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
+7.16%
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
$37.6B
AUM Growth
+$1.57B
(+4.4%)
Cap. Flow
-$160M
Cap. Flow
% of AUM
-0.43%
Top 10 Holdings %
Top 10 Hldgs %
26.02%
Holding
1,919
New
98
Increased
697
Reduced
774
Closed
75
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Meta Platforms (Facebook)
META
|
+$76.1M |
| 2 |
Applovin
APP
|
+$75.3M |
| 3 |
ServiceNow
NOW
|
+$66.6M |
| 4 |
CWAN
Clearwater Analytics
CWAN
|
+$65.8M |
| 5 |
Diamondback Energy
FANG
|
+$30.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
CYBR
CyberArk
CYBR
|
+$70.7M |
| 2 |
Adobe
ADBE
|
+$61.7M |
| 3 |
Microsoft
MSFT
|
+$45.7M |
| 4 |
Workday
WDAY
|
+$42.6M |
| 5 |
Pool Corp
POOL
|
+$41.7M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 27.36% |
| 2 | Financials | 13.36% |
| 3 | Industrials | 12.59% |
| 4 | Healthcare | 10.97% |
| 5 | Consumer Discretionary | 7.45% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
851
DoorDash
DASH
$93.7B
| $1.31M | ﹤0.01% |
4,814
| – | – |
|
852
Innovator US Equity Power Buffer ETF November
PNOV
$898M
| $1.31M | ﹤0.01% |
31,792
| – | – |
|
853
Hartford Financial Services
HIG
$37.8B
| $1.3M | ﹤0.01% |
9,769
+1,159
| +13% | +$149K |
|
854
Genuine Parts
GPC
$18.7B
| $1.29M | ﹤0.01% |
9,339
+1,251
| +15% | +$168K |
|
855
OGE Energy
OGE
$9.71B
| $1.27M | ﹤0.01% |
27,454
+234
| +0.9% | +$10.5K |
|
856
Carlyle Group
CG
$18.3B
| $1.27M | ﹤0.01% |
20,259
+1,080
| +6% | +$67.5K |
|
857
State Street
STT
$52.2B
| $1.26M | ﹤0.01% |
10,843
-697
| -6% | -$77.8K |
|
|
VG
858
Venture Global Inc
VG
$33.9B
| $1.25M | ﹤0.01% |
88,424
+64,854
| +275% | +$924K |
|
859
Invesco S&P 500 Top 50 ETF
XLG
$11B
| $1.24M | ﹤0.01% |
21,479
-2,600
| -11% | -$142K |
|
860
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.8B
| $1.23M | ﹤0.01% |
22,212
-3,726
| -14% | -$201K |
|
|
NNE
861
Nano Nuclear Energy
NNE
$1.1B
| $1.23M | ﹤0.01% |
31,860
| – | – |
|
862
Remitly
RELY
$5.39B
| $1.23M | ﹤0.01% |
75,363
-131,892
| -64% | -$2.37M |
|
863
Hims & Hers Health
HIMS
$6.71B
| $1.22M | ﹤0.01% |
21,518
-245
| -1% | -$12.6K |
|
864
MGM Resorts International
MGM
$11.1B
| $1.22M | ﹤0.01% |
35,195
-2,497
| -7% | -$91.6K |
|
865
Dentsply Sirona
XRAY
$2.31B
| $1.22M | ﹤0.01% |
95,771
+20
| +0% | +$290 |
|
|
AMTM
866
Amentum Holdings
AMTM
$5.3B
| $1.21M | ﹤0.01% |
50,649
-5,919
| -10% | -$144K |
|
867
NXP Semiconductors
NXPI
$58.5B
| $1.21M | ﹤0.01% |
5,314
-355
| -6% | -$79.8K |
|
868
OSI Systems
OSIS
$3.77B
| $1.21M | ﹤0.01% |
4,855
+1,962
| +68% | +$448K |
|
869
iShares MSCI World ETF
URTH
$8.4B
| $1.21M | ﹤0.01% |
6,664
-30
| -0.4% | -$5.24K |
|
|
SCHV
870
Schwab US Large-Cap Value ETF
SCHV
$16.3B
| $1.21M | ﹤0.01% |
41,530
+24
| +0.1% | +$682 |
|
871
Sprouts Farmers Market
SFM
$7.71B
| $1.21M | ﹤0.01% |
11,102
+16
| +0.1% | +$2.33K |
|
872
Ventas
VTR
$46.3B
| $1.2M | ﹤0.01% |
17,142
+519
| +3% | +$34.9K |
|
873
Flowserve
FLS
$10.3B
| $1.19M | ﹤0.01% |
22,456
+2,395
| +12% | +$130K |
|
874
Ingersoll Rand
IR
$32.7B
| $1.19M | ﹤0.01% |
14,411
-161
| -1% | -$13.2K |
|
875
WisdomTree US Total Dividend Fund
DTD
$1.7B
| $1.19M | ﹤0.01% |
14,110
| – | – |
|
Similar funds
HF
William Blair & Company's Q3 2025 Portfolio in Review
As of Q3 2025, William Blair & Company held 1,919 positions worth $37.6B, up 4.4% from $36B the previous quarter. Its ten largest holdings account for 26% of the portfolio.
William Blair & Company's Q3 2025 filing shows 98 new, 697 increased, 774 reduced and 75 closed positions. Its largest new stake was Miami International Holdings: 363,765 shares worth $14.6M. The largest sale was CyberArk, an estimated $70.7M.
By sector, the portfolio is most concentrated in Technology at 27% of assets, down from 27% a quarter earlier, followed by Financials and Industrials.
- William Blair & Company's largest Q3 2025 buy was Miami International Holdings: 363,765 shares worth $14.6M.
- William Blair & Company added most to Meta Platforms (Facebook) in Q3 2025, an estimated $76.1M increase.
- William Blair & Company's biggest Q3 2025 reduction was CyberArk, cutting an estimated $70.7M.
- William Blair & Company fully exited Stride in Q3 2025, selling an estimated $7.47M.
- William Blair & Company's ten largest holdings make up 26% of its $37.6B portfolio in Q3 2025.
- William Blair & Company opened 98 new positions and closed 75 in Q3 2025.
- William Blair & Company's portfolio value rose 4.4% quarter-over-quarter to $37.6B.
Based on William Blair & Company's 13F filing for Q3 2025, filed 12 Nov 2025.