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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
+14.12%
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
$29.3B
AUM Growth
+$3.27B
Cap. Flow
-$91M
Cap. Flow %
-0.31%
Top 10 Hldgs %
24.41%
Holding
1,872
New
83
Increased
624
Reduced
816
Closed
87

Top Buys

Rank Stock Value
1
GWRE icon
Guidewire Software
GWRE
+$37.5M
2
SCHW
Charles Schwab
SCHW
+$37.1M
3
VLTO icon
Veralto
VLTO
+$17.1M
4
VRTX icon
Vertex Pharmaceuticals
VRTX
+$16.7M
5
CSGP icon
CoStar Group
CSGP
+$16.3M

Top Sells

Rank Stock Value
1
DHR icon
Danaher
DHR
+$37.6M
2
IRTC icon
iRhythm Holdings
IRTC
+$26.7M
3
DE icon
Deere & Co
DE
+$22.6M
4
TOST icon
Toast
TOST
+$21.2M
5
KO icon
Coca-Cola
KO
+$20.3M

Sector Composition

Rank Sector Weight
1 Technology 26.35%
2 Healthcare 17.08%
3 Financials 12.09%
4 Industrials 11.7%
5 Consumer Discretionary 8.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
DDOG icon
526
Datadog
DDOG
$86.5B
$3.72M 0.01%
30,686
-5,394
-15% -$556K
ILMN icon
527
Illumina
ILMN
$29.1B
$3.69M 0.01%
27,270
-2,358
-8% -$272K
PAPR icon
528
Innovator US Equity Power Buffer ETF April
PAPR
$960M
$3.67M 0.01%
112,249
– –
BBY icon
529
Best Buy
BBY
$17.5B
$3.65M 0.01%
46,691
-1,703
-4% -$120K
MLM icon
530
Martin Marietta Materials
MLM
$32.7B
$3.65M 0.01%
7,324
+426
+6% +$192K
QDEL icon
531
QuidelOrtho
QDEL
$1.02B
$3.62M 0.01%
49,159
-21,123
-30% -$1.43M
III icon
532
Information Services Group
III
$249M
$3.61M 0.01%
766,644
+22,005
+3% +$96.2K
IBN icon
533
ICICI Bank
IBN
$107B
$3.59M 0.01%
150,465
-115
-0.1% -$2.65K
CMI icon
534
Cummins
CMI
$87.8B
$3.58M 0.01%
14,931
+1,612
+12% +$366K
XLY icon
535
State Street Consumer Discretionary Select Sector SPDR ETF
XLY
$23.4B
$3.58M 0.01%
40,002
+5,340
+15% +$442K
ENS icon
536
EnerSys
ENS
$6.81B
$3.56M 0.01%
35,287
-16,787
-32% -$1.54M
BMRN icon
537
BioMarin Pharmaceuticals
BMRN
$13.6B
$3.56M 0.01%
36,909
-490
-1% -$43.3K
VOOV icon
538
Vanguard S&P 500 Value ETF
VOOV
$6.77B
$3.55M 0.01%
21,138
+639
+3% +$99.3K
XLI icon
539
State Street Industrial Select Sector SPDR ETF
XLI
$34.7B
$3.5M 0.01%
30,705
-1,080
-3% -$113K
GSHD icon
540
Goosehead Insurance
GSHD
$2.33B
$3.49M 0.01%
45,987
-4,914
-10% -$355K
MRNA icon
541
Moderna
MRNA
$25.4B
$3.47M 0.01%
34,916
-6,369
-15% -$536K
RPAY icon
542
Repay Holdings
RPAY
$311M
$3.47M 0.01%
406,027
-54,100
-12% -$381K
PGX icon
543
Invesco Preferred ETF
PGX
$3.76B
$3.47M 0.01%
302,293
+2,567
+0.9% +$28K
MANH icon
544
Manhattan Associates
MANH
$11.2B
$3.46M 0.01%
16,048
-238
-1% -$50.4K
XES icon
545
State Street SPDR S&P Oil & Gas Equipment & Services ETF
XES
$390M
$3.4M 0.01%
40,248
+357
+0.9% +$31K
VOT icon
546
Vanguard Morningstar Mid-Cap Growth ETF
VOT
$20B
$3.39M 0.01%
15,433
-217
-1% -$43.4K
EPAM icon
547
EPAM Systems
EPAM
$5.17B
$3.39M 0.01%
11,390
+23
+0.2% +$5.84K
VDC icon
548
Vanguard Consumer Staples ETF
VDC
$7.96B
$3.39M 0.01%
17,735
-308
-2% -$56.5K
BWXT icon
549
BWX Technologies
BWXT
$15.8B
$3.39M 0.01%
44,137
-857
-2% -$65.9K
PEN icon
550
Penumbra
PEN
$12.9B
$3.37M 0.01%
13,417
+4,119
+44% +$910K
20 21
22
23 24

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William Blair & Company's Q4 2023 Portfolio in Review

As of Q4 2023, William Blair & Company held 1,872 positions worth $29.3B, up 13% from $26.1B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q4 2023 filing shows 83 new, 624 increased, 816 reduced and 87 closed positions. Its largest new stake was Veralto: 229,539 shares worth $18.9M. The largest sale was Danaher, an estimated $37.6M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, up from 25% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q4 2023 buy was Veralto: 229,539 shares worth $18.9M.
  • William Blair & Company added most to Guidewire Software in Q4 2023, an estimated $37.5M increase.
  • William Blair & Company's biggest Q4 2023 reduction was Danaher, cutting an estimated $37.6M.
  • William Blair & Company fully exited Seagen Inc. Common Stock in Q4 2023, selling an estimated $13.8M.
  • William Blair & Company's ten largest holdings make up 24% of its $29.3B portfolio in Q4 2023.
  • William Blair & Company opened 83 new positions and closed 87 in Q4 2023.
  • William Blair & Company's portfolio value rose 13% quarter-over-quarter to $29.3B.

Based on William Blair & Company's 13F filing for Q4 2023, filed 12 Feb 2024.