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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
+12.61%
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
$36B
AUM Growth
+$2.85B
(+8.6%)
Cap. Flow
-$222M
Cap. Flow
% of AUM
-0.62%
Top 10 Holdings %
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
GE Vernova
GEV
|
+$116M |
| 2 |
Boeing
BA
|
+$34M |
| 3 |
CWAN
Clearwater Analytics
CWAN
|
+$31.2M |
| 4 |
NVIDIA
NVDA
|
+$27.5M |
| 5 |
Cloudflare
NET
|
+$26.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
XYZ
Block Inc
XYZ
|
+$79.4M |
| 2 |
Zoetis
ZTS
|
+$41.3M |
| 3 |
Accenture
ACN
|
+$40.8M |
| 4 |
iShares Core S&P Mid-Cap ETF
IJH
|
+$40.7M |
| 5 |
UnitedHealth
UNH
|
+$36.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 27.47% |
| 2 | Financials | 13.92% |
| 3 | Industrials | 12.94% |
| 4 | Healthcare | 11.51% |
| 5 | Consumer Discretionary | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
726
iShares US Real Estate ETF
IYR
$4.65B
| $1.9M | 0.01% |
20,041
-887
| -4% | -$82.8K |
|
727
First Citizens BancShares
FCNCA
$25.3B
| $1.89M | 0.01% |
967
+2
| +0.2% | +$3.63K |
|
728
American Water Works
AWK
$26.9B
| $1.89M | 0.01% |
13,553
+864
| +7% | +$124K |
|
729
Antero Resources
AR
$10.7B
| $1.88M | 0.01% |
46,587
+6,731
| +17% | +$255K |
|
730
Innovator US Equity Power Buffer ETF May
PMAY
$817M
| $1.87M | 0.01% |
49,594
+40,728
| +459% | +$1.47M |
|
731
Biogen
BIIB
$30.7B
| $1.86M | 0.01% |
14,844
+1,561
| +12% | +$195K |
|
732
Agnico Eagle Mines
AEM
$90.5B
| $1.86M | 0.01% |
15,617
-370
| -2% | -$42.9K |
|
733
ARK Innovation ETF
ARKK
$6.31B
| $1.86M | 0.01% |
26,421
-19,101
| -42% | -$1.05M |
|
734
Innovator Growth-100 Power Buffer ETF April
NAPR
$212M
| $1.84M | 0.01% |
36,140
-9,437
| -21% | -$460K |
|
735
Global Payments
GPN
$22.8B
| $1.84M | 0.01% |
23,027
-4,468
| -16% | -$354K |
|
736
Keysight
KEYS
$58.3B
| $1.84M | 0.01% |
11,229
-1,153
| -9% | -$176K |
|
|
WBA
737
DELISTED
Walgreens Boots Alliance
WBA
| $1.83M | 0.01% |
159,654
-3,607
| -2% | -$40.2K |
|
738
Weyerhaeuser
WY
$18.4B
| $1.83M | 0.01% |
71,230
-23,241
| -25% | -$608K |
|
739
Sprouts Farmers Market
SFM
$8.01B
| $1.83M | 0.01% |
11,086
+6
| +0.1% | +$980 |
|
740
iShares MSCI EAFE Small-Cap ETF
SCZ
$13.7B
| $1.82M | 0.01% |
25,012
+414
| +2% | +$28K |
|
741
Newmont
NEM
$119B
| $1.81M | 0.01% |
31,152
-477
| -2% | -$25.5K |
|
742
Ford
F
$55.7B
| $1.81M | 0.01% |
167,239
-4,141
| -2% | -$42.2K |
|
743
iShares Biotechnology ETF
IBB
$9.77B
| $1.81M | 0.01% |
14,282
-8,799
| -38% | -$1.08M |
|
744
iShares MSCI USA Momentum Factor ETF
MTUM
$26.2B
| $1.8M | 0.01% |
7,495
+594
| +9% | +$130K |
|
745
Vanguard Russell 1000 Value ETF
VONV
$21.2B
| $1.8M | 0.01% |
21,100
+8,304
| +65% | +$675K |
|
746
Ciena
CIEN
$58.4B
| $1.79M | 0.01% |
22,020
| – | – |
|
747
Vanguard S&P Mid-Cap 400 Growth ETF
IVOG
$1.7B
| $1.79M | 0.01% |
15,819
-488
| -3% | -$51.9K |
|
748
Kraft Heinz
KHC
$30B
| $1.79M | 0.01% |
69,199
-50,092
| -42% | -$1.39M |
|
749
JPMorgan BetaBuilders Europe ETF
BBEU
$9.54B
| $1.77M | ﹤0.01% |
26,202
+3,179
| +14% | +$206K |
|
750
iShares S&P Mid-Cap 400 Value ETF
IJJ
$8.97B
| $1.76M | ﹤0.01% |
14,278
-1,424
| -9% | -$168K |
|
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William Blair & Company's Q2 2025 Portfolio in Review
As of Q2 2025, William Blair & Company held 1,911 positions worth $36B, up 8.6% from $33.2B the previous quarter. Its ten largest holdings account for 25% of the portfolio.
William Blair & Company's Q2 2025 filing shows 111 new, 662 increased, 757 reduced and 87 closed positions. Its largest new stake was Affirm: 304,959 shares worth $21.1M. The largest sale was Block Inc, an estimated $79.4M.
By sector, the portfolio is most concentrated in Technology at 27% of assets, up from 26% a quarter earlier, followed by Financials and Industrials.
- William Blair & Company's largest Q2 2025 buy was Affirm: 304,959 shares worth $21.1M.
- William Blair & Company added most to GE Vernova in Q2 2025, an estimated $116M increase.
- William Blair & Company's biggest Q2 2025 reduction was Block Inc, cutting an estimated $79.4M.
- William Blair & Company fully exited Discover Financial Services in Q2 2025, selling an estimated $5.21M.
- William Blair & Company's ten largest holdings make up 25% of its $36B portfolio in Q2 2025.
- William Blair & Company opened 111 new positions and closed 87 in Q2 2025.
- William Blair & Company's portfolio value rose 8.6% quarter-over-quarter to $36B.
Based on William Blair & Company's 13F filing for Q2 2025, filed 24 Jul 2025.