We are live on ! Find out more
William Blair & Company

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
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
GCMG icon
351
GCM Grosvenor
GCMG
$820M
$9.7M 0.03%
839,206
-813
-0.1% -$10.1K
PHO icon
352
Invesco Water Resources ETF
PHO
$2.09B
$9.58M 0.03%
136,963
+17,734
+15% +$1.18M
PAVE icon
353
Global X US Infrastructure Development ETF
PAVE
$15.2B
$9.56M 0.03%
219,440
-189,000
-46% -$7.56M
ADI icon
354
Analog Devices
ADI
$190B
$9.54M 0.03%
40,064
+454
+1% +$94.5K
STWD icon
355
Starwood Property Trust
STWD
$6.09B
$9.5M 0.03%
473,562
+46,772
+11% +$909K
SSNC icon
356
SS&C Technologies
SSNC
$18.6B
$9.46M 0.03%
114,209
+7,488
+7% +$589K
FVD icon
357
First Trust Value Line Dividend Fund
FVD
$8.41B
$9.45M 0.03%
211,479
-2,633
-1% -$116K
SO icon
358
Southern Company
SO
$107B
$9.42M 0.03%
102,596
+795
+0.8% +$71.4K
MAR icon
359
Marriott International
MAR
$92.3B
$9.41M 0.03%
34,442
+1,711
+5% +$429K
HBAN icon
360
Huntington Bancshares
HBAN
$35.5B
$9.41M 0.03%
561,307
-21,961
-4% -$331K
PNC icon
361
PNC Financial Services
PNC
$101B
$9.35M 0.03%
50,151
+2,473
+5% +$419K
ELF icon
362
e.l.f. Beauty
ELF
$5.81B
$9.3M 0.03%
74,699
+50,311
+206% +$4.29M
GDYN icon
363
Grid Dynamics Holdings
GDYN
$615M
$9.2M 0.03%
796,643
+10,538
+1% +$139K
TMDX icon
364
Transmedics
TMDX
$2.91B
$9.18M 0.03%
68,487
-6,508
-9% -$715K
MCK icon
365
McKesson
MCK
$101B
$9.15M 0.03%
12,492
-827
-6% -$584K
EFG icon
366
iShares MSCI EAFE Growth ETF
EFG
$17.3B
$9.14M 0.03%
81,627
-1,466
-2% -$155K
GBTC icon
367
Grayscale Bitcoin Trust
GBTC
$9.76B
$9.13M 0.03%
107,600
-466
-0.4% -$36.2K
PBH icon
368
Prestige Consumer Healthcare
PBH
$2.6B
$9.1M 0.03%
113,941
+7,827
+7% +$655K
HUBB icon
369
Hubbell
HUBB
$27.2B
$9M 0.03%
22,042
-378
-2% -$140K
XMTR icon
370
Xometry
XMTR
$5.34B
$8.98M 0.03%
265,858
+10,081
+4% +$296K
FERG icon
371
Ferguson
FERG
$49.8B
$8.97M 0.02%
41,178
+573
+1% +$105K
COWZ icon
372
Pacer US Cash Cows 100 ETF
COWZ
$19.4B
$8.87M 0.02%
161,039
+10,272
+7% +$544K
TEL icon
373
TE Connectivity
TEL
$62.6B
$8.83M 0.02%
52,368
+1,928
+4% +$293K
IWN icon
374
iShares Russell 2000 Value ETF
IWN
$14.6B
$8.83M 0.02%
55,949
+2,642
+5% +$393K
VKTX icon
375
Viking Therapeutics
VKTX
$4B
$8.75M 0.02%
330,007
+21,442
+7% +$564K
13 14
15
16 17

Similar funds

SAM
Storebrand Asset Management Lysaker, Norway $34.8B AUM 25.49% 1-Year Est. Return
Chevy Chase Trust
Chevy Chase Trust Bethesda, Maryland $34.7B AUM 29.45% 1-Year Est. Return
VIA
Vanguard Investments Australia Victoria, Australia $34.6B AUM
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return
Pacer Advisors
Pacer Advisors Malvern, Pennsylvania $35.6B AUM 18.19% 1-Year Est. Return
Kayne Anderson Rudnick Investment Management
Kayne Anderson Rudnick Investment Management Los Angeles, California $34B AUM 6.31% 1-Year Est. Return
Viking Global Investors
Viking Global Investors Stamford, Connecticut $35.7B AUM 21.3% 1-Year Est. Return
First Manhattan
First Manhattan New York $36.1B AUM 11.5% 1-Year Est. Return

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.