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William Blair & Company

William Blair & Company Portfolio holdings

AUM $38.4B
1-Year Est. Return 25.71%
This Fund
S&P 500
This Quarter Est. Return
+12.61%
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
$36B
AUM Growth
+$2.85B
Cap. Flow
-$222M
Cap. Flow %
-0.62%
Top 10 Hldgs %
24.91%
Holding
1,911
New
111
Increased
662
Reduced
757
Closed
87

Top Buys

Rank Stock Value
1
GEV icon
GE Vernova
GEV
+$116M
2
BA icon
Boeing
BA
+$34M
3
CWAN
Clearwater Analytics
CWAN
+$31.2M
4
NVDA icon
NVIDIA
NVDA
+$27.5M
5
NET icon
Cloudflare
NET
+$26.2M

Top Sells

Rank Stock Value
1
XYZ
Block Inc
XYZ
+$79.4M
2
ZTS icon
Zoetis
ZTS
+$41.3M
3
ACN icon
Accenture
ACN
+$40.8M
4
IJH icon
iShares Core S&P Mid-Cap ETF
IJH
+$40.7M
5
UNH icon
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
GLW icon
276
Corning
GLW
$137B
$15.1M 0.04%
286,220
-17,197
-6% -$805K
CB icon
277
Chubb
CB
$133B
$15M 0.04%
51,878
+770
+2% +$222K
SYY icon
278
Sysco
SYY
$40B
$14.9M 0.04%
196,995
+8,372
+4% +$608K
VMI icon
279
Valmont Industries
VMI
$9.5B
$14.8M 0.04%
45,181
-3,606
-7% -$1.11M
CMI icon
280
Cummins
CMI
$87B
$14.7M 0.04%
44,982
+1,319
+3% +$408K
AZN icon
281
AstraZeneca
AZN
$244B
$14.7M 0.04%
105,206
-3,671
-3% -$514K
HOOD icon
282
Robinhood
HOOD
$89.3B
$14.5M 0.04%
+155,366
New +$9.2M
PAUG icon
283
Innovator US Equity Power Buffer ETF August
PAUG
$938M
$14.5M 0.04%
358,968
-101,611
-22% -$3.9M
VRRM icon
284
Verra Mobility
VRRM
$731M
$14.5M 0.04%
571,329
-22,526
-4% -$525K
HWM icon
285
Howmet Aerospace
HWM
$113B
$14.4M 0.04%
77,454
+349
+0.5% +$53.7K
SMMD icon
286
iShares Russell 2500 ETF
SMMD
$3.77B
$14.4M 0.04%
212,306
-5,498
-3% -$348K
MMM icon
287
3M
MMM
$94.2B
$14.2M 0.04%
93,375
+7,111
+8% +$1.02M
BLBD icon
288
Blue Bird Corp
BLBD
$2.05B
$14.1M 0.04%
326,935
-11,578
-3% -$441K
C icon
289
Citigroup
C
$233B
$14.1M 0.04%
165,591
+4,401
+3% +$318K
FTV icon
290
Fortive
FTV
$18.7B
$14.1M 0.04%
269,662
-111,048
-29% -$5.82M
PWR icon
291
Quanta Services
PWR
$101B
$14M 0.04%
37,135
+1,291
+4% +$414K
CHD icon
292
Church & Dwight Co
CHD
$24B
$14M 0.04%
145,827
-14,490
-9% -$1.43M
SNPS icon
293
Synopsys
SNPS
$78.8B
$14M 0.04%
27,275
-4,768
-15% -$2.22M
VXF icon
294
Vanguard Extended Market ETF
VXF
$32.3B
$14M 0.04%
72,535
+327
+0.5% +$58.1K
CBOE icon
295
Cboe Global Markets
CBOE
$30.6B
$14M 0.04%
59,849
-722
-1% -$161K
VNQ icon
296
Vanguard Real Estate ETF
VNQ
$39.1B
$13.9M 0.04%
156,634
-8,608
-5% -$759K
VB icon
297
Vanguard Morningstar Small-Cap ETF
VB
$83.4B
$13.9M 0.04%
58,809
-606
-1% -$135K
DOV icon
298
Dover
DOV
$27.8B
$13.8M 0.04%
75,088
-1,324
-2% -$230K
CI icon
299
Cigna
CI
$73.5B
$13.7M 0.04%
41,581
+2,687
+7% +$866K
SHW icon
300
Sherwin-Williams
SHW
$87.8B
$13.7M 0.04%
39,874
-1,213
-3% -$420K
10 11
12
13 14

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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.