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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
-1.82%
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
$33.2B
AUM Growth
-$1.22B
Cap. Flow
+$11.1M
Cap. Flow %
0.03%
Top 10 Hldgs %
23.77%
Holding
1,895
New
82
Increased
626
Reduced
808
Closed
94

Top Buys

Rank Stock Value
1
META icon
Meta Platforms (Facebook)
META
+$112M
2
AAON icon
Aaon
AAON
+$104M
3
GEV icon
GE Vernova
GEV
+$77.6M
4
QCOM icon
Qualcomm
QCOM
+$47M
5
WM icon
Waste Management
WM
+$44.3M

Top Sells

Rank Stock Value
1
INTU icon
Intuit
INTU
+$65.9M
2
POOL icon
Pool Corp
POOL
+$64.7M
3
DHR icon
Danaher
DHR
+$59.8M
4
ZTS icon
Zoetis
ZTS
+$57.9M
5
SCHW
Charles Schwab
SCHW
+$44.5M

Sector Composition

Rank Sector Weight
1 Technology 26.23%
2 Financials 14.3%
3 Healthcare 12.58%
4 Industrials 12.51%
5 Consumer Discretionary 7.94%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
MRCY icon
451
Mercury Systems
MRCY
$6.6B
$5.7M 0.02%
132,168
-3,871
-3% -$170K
SU icon
452
Suncor Energy
SU
$74.7B
$5.63M 0.02%
145,282
+543
+0.4% +$20.7K
HPQ icon
453
HP
HPQ
$27.3B
$5.6M 0.02%
202,409
-3,317
-2% -$105K
IRDM icon
454
Iridium Communications
IRDM
$5.31B
$5.57M 0.02%
203,961
-57,177
-22% -$1.68M
DOW icon
455
Dow Inc
DOW
$21.9B
$5.55M 0.02%
158,938
-19,943
-11% -$766K
COP icon
456
ConocoPhillips
COP
$151B
$5.55M 0.02%
52,831
+620
+1% +$61.8K
THR
457
DELISTED
Thermon Group Holdings
THR
$5.54M 0.02%
198,924
+495
+0.2% +$14.3K
YUM icon
458
Yum! Brands
YUM
$42B
$5.54M 0.02%
35,175
-127
-0.4% -$18.3K
MPWR icon
459
Monolithic Power Systems
MPWR
$69.9B
$5.51M 0.02%
9,508
-1,850
-16% -$1.17M
AIOT
460
PowerFleet Inc
AIOT
$428M
$5.5M 0.02%
1,002,649
+493,729
+97% +$3.17M
CRDF icon
461
Cardiff Oncology
CRDF
$79.4M
$5.5M 0.02%
1,751,274
+1,469,249
+521% +$5.81M
OPRX icon
462
OptimizeRx
OPRX
$142M
$5.46M 0.02%
631,031
+29,648
+5% +$181K
RF icon
463
Regions Financial
RF
$27B
$5.43M 0.02%
249,692
+385
+0.2% +$8.97K
QLYS icon
464
Qualys
QLYS
$6.59B
$5.39M 0.02%
42,823
-17,315
-29% -$2.34M
ENB icon
465
Enbridge
ENB
$112B
$5.36M 0.02%
120,952
-1,969
-2% -$85.7K
PRF icon
466
Invesco FTSE RAFI US 1000 ETF
PRF
$10.1B
$5.35M 0.02%
132,515
+527
+0.4% +$21.7K
DAY
467
DELISTED
Dayforce
DAY
$5.29M 0.02%
90,649
-6,291
-6% -$405K
ULTA icon
468
Ulta Beauty
ULTA
$22.6B
$5.26M 0.02%
14,349
-18,520
-56% -$7.06M
SJM icon
469
J.M. Smucker
SJM
$12.9B
$5.25M 0.02%
44,374
-22,120
-33% -$2.39M
THRY icon
470
Thryv Holdings
THRY
$96M
$5.25M 0.02%
409,938
+19,392
+5% +$321K
VLO icon
471
Valero Energy
VLO
$94.4B
$5.25M 0.02%
39,746
+950
+2% +$126K
NUE icon
472
Nucor
NUE
$61.8B
$5.22M 0.02%
43,401
-318
-0.7% -$41K
DFS
473
DELISTED
Discover Financial Services
DFS
$5.21M 0.02%
30,537
+232
+0.8% +$42.4K
CGUS icon
474
Capital Group Core Equity ETF
CGUS
$11.9B
$5.2M 0.02%
155,608
+7,068
+5% +$248K
FNF icon
475
Fidelity National Financial
FNF
$13B
$5.14M 0.02%
79,000
-1,681
-2% -$101K
17 18
19
20 21

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William Blair & Company's Q1 2025 Portfolio in Review

As of Q1 2025, William Blair & Company held 1,895 positions worth $33.2B, down 3.6% from $34.4B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q1 2025 filing shows 82 new, 626 increased, 808 reduced and 94 closed positions. Its largest new stake was CCC Intelligent Solutions: 320,989 shares worth $2.9M. The largest sale was Intuit, an estimated $65.9M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 28% a quarter earlier, followed by Financials and Healthcare.

  • William Blair & Company's largest Q1 2025 buy was CCC Intelligent Solutions: 320,989 shares worth $2.9M.
  • William Blair & Company added most to Meta Platforms (Facebook) in Q1 2025, an estimated $112M increase.
  • William Blair & Company's biggest Q1 2025 reduction was Intuit, cutting an estimated $65.9M.
  • William Blair & Company fully exited Smartsheet Inc. in Q1 2025, selling an estimated $3.52M.
  • William Blair & Company's ten largest holdings make up 24% of its $33.2B portfolio in Q1 2025.
  • William Blair & Company opened 82 new positions and closed 94 in Q1 2025.
  • William Blair & Company's portfolio value fell 3.6% quarter-over-quarter to $33.2B.

Based on William Blair & Company's 13F filing for Q1 2025, filed 9 May 2025.