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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 | |
|---|---|---|---|---|---|---|
426
Jacobs Solutions
J
$17B
| $6.77M | 0.02% |
51,531
-2,499
| -5% | -$308K |
|
427
Mercury Systems
MRCY
$6.52B
| $6.74M | 0.02% |
125,047
-7,121
| -5% | -$347K |
|
428
Spotify
SPOT
$100B
| $6.72M | 0.02% |
8,756
+7,404
| +548% | +$4.75M |
|
429
iShares S&P 100 ETF
OEF
$20.6B
| $6.69M | 0.02% |
21,981
-71
| -0.3% | -$19.8K |
|
430
Ameriprise Financial
AMP
$48.8B
| $6.67M | 0.02% |
12,506
-145
| -1% | -$71.6K |
|
431
Intel
INTC
$513B
| $6.64M | 0.02% |
296,439
-32,440
| -10% | -$672K |
|
432
Unilever
UL
$136B
| $6.63M | 0.02% |
96,357
+5,024
| +6% | +$353K |
|
433
Donaldson
DCI
$11.4B
| $6.63M | 0.02% |
95,573
+1,311
| +1% | +$88.2K |
|
434
iShares Russell Mid-Cap Growth ETF
IWP
$20.7B
| $6.63M | 0.02% |
47,784
-2,223
| -4% | -$281K |
|
435
Align Technology
ALGN
$12.3B
| $6.62M | 0.02% |
34,979
-38,628
| -52% | -$6.82M |
|
436
Monolithic Power Systems
MPWR
$68.9B
| $6.57M | 0.02% |
8,987
-521
| -5% | -$332K |
|
437
Canadian Pacific Kansas City
CP
$80.5B
| $6.57M | 0.02% |
82,830
-3,905
| -5% | -$300K |
|
438
Sprott Physical Gold
PHYS
$15.7B
| $6.55M | 0.02% |
258,356
-41,849
| -14% | -$1.05M |
|
439
Qualys
QLYS
$6.35B
| $6.47M | 0.02% |
45,263
+2,440
| +6% | +$323K |
|
|
UCB
440
United Community Banks
UCB
$4.28B
| $6.45M | 0.02% |
216,622
| – | – |
|
441
MetLife
MET
$62.4B
| $6.35M | 0.02% |
78,908
-190
| -0.2% | -$14.7K |
|
442
StoneX
SNEX
$7.94B
| $6.34M | 0.02% |
156,467
+149,042
| +2,007% | +$5.6M |
|
443
Cencora
COR
$61.2B
| $6.33M | 0.02% |
21,121
+353
| +2% | +$102K |
|
444
Xylem
XYL
$28.1B
| $6.29M | 0.02% |
48,600
+7,269
| +18% | +$880K |
|
445
General Mills
GIS
$19.7B
| $6.14M | 0.02% |
118,493
-2,706
| -2% | -$149K |
|
446
SoFi Technologies
SOFI
$23.7B
| $6.11M | 0.02% |
335,698
+273,972
| +444% | +$3.61M |
|
447
Snowflake
SNOW
$115B
| $6.07M | 0.02% |
27,140
-21,774
| -45% | -$3.94M |
|
448
Vanguard Intermediate-Term Corporate Bond ETF
VCIT
$66.3B
| $6.06M | 0.02% |
73,071
+1,580
| +2% | +$128K |
|
449
FedEx
FDX
$75.4B
| $6.04M | 0.02% |
26,557
-822
| -3% | -$180K |
|
450
Becton Dickinson
BDX
$48.7B
| $6.03M | 0.02% |
35,036
-2,230
| -6% | -$409K |
|
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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.