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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
PSA icon
876
Public Storage
PSA
$61.4B
$925K ﹤0.01%
3,033
+181
+6% +$48K
WMS icon
877
Advanced Drainage Systems
WMS
$11.3B
$921K ﹤0.01%
6,551
-109
-2% -$13.1K
PSCE icon
878
Invesco S&P SmallCap Energy ETF
PSCE
$104M
$920K ﹤0.01%
17,667
-1,644
-9% -$87.3K
HPE icon
879
Hewlett Packard
HPE
$79.2B
$918K ﹤0.01%
54,069
-3,552
-6% -$57.9K
PLTR icon
880
Palantir
PLTR
$430B
$915K ﹤0.01%
53,300
+3,345
+7% +$59.6K
HIMS icon
881
Hims & Hers Health
HIMS
$6.71B
$911K ﹤0.01%
102,381
-39,000
-28% -$288K
HWM icon
882
Howmet Aerospace
HWM
$113B
$910K ﹤0.01%
16,812
+3,995
+31% +$197K
BBCA icon
883
JPMorgan BetaBuilders Canada ETF
BBCA
$11.4B
$906K ﹤0.01%
14,131
+252
+2% +$14.9K
SUSB icon
884
iShares ESG Aware 1-5 Year USD Corporate Bond ETF
SUSB
$1.3B
$906K ﹤0.01%
37,000
+6,535
+21% +$157K
VCR icon
885
Vanguard Consumer Discretionary ETF
VCR
$6.11B
$906K ﹤0.01%
2,974
-241
-7% -$67.2K
LNT icon
886
Alliant Energy
LNT
$18.2B
$901K ﹤0.01%
17,555
-69
-0.4% -$3.44K
WAL icon
887
Western Alliance Bancorporation
WAL
$8.92B
$899K ﹤0.01%
13,660
-1,901
-12% -$95.9K
BFAM icon
888
Bright Horizons
BFAM
$3.85B
$898K ﹤0.01%
9,533
-202
-2% -$17.2K
JBTM
889
JBT Marel
JBTM
$6.1B
$892K ﹤0.01%
8,970
– –
LYB icon
890
LyondellBasell Industries
LYB
$20.2B
$887K ﹤0.01%
9,333
+1,032
+12% +$96.5K
AUGX
891
DELISTED
Augmedix, Inc. Common Stock
AUGX
$884K ﹤0.01%
151,189
+53,150
+54% +$280K
USD icon
892
ProShares Ultra Semiconductors
USD
$2.99B
$880K ﹤0.01%
64,700
-200
-0.3% -$2.18K
JBGS
893
JBG SMITH
JBGS
$692M
$876K ﹤0.01%
51,500
– –
O icon
894
Realty Income
O
$59.6B
$872K ﹤0.01%
15,193
-789
-5% -$41.4K
MSTR icon
895
Strategy Inc
MSTR
$38.2B
$871K ﹤0.01%
13,790
-250
-2% -$11.9K
PDBC icon
896
Invesco Actively Managed Exch-Traded Commodity Fd Tr Invesco Optimum Yield Diversified Commodity Strategy No K-1 ETF
PDBC
$6.61B
$868K ﹤0.01%
65,245
+8,634
+15% +$124K
FXI icon
897
iShares China Large-Cap ETF
FXI
$4.16B
$866K ﹤0.01%
36,043
+31,595
+710% +$801K
UAL icon
898
United Airlines
UAL
$41B
$861K ﹤0.01%
20,871
-1,315
-6% -$51.7K
TWST icon
899
Twist Bioscience
TWST
$7.86B
$861K ﹤0.01%
23,358
-1,910
-8% -$44.2K
BLDR icon
900
Builders FirstSource
BLDR
$7.91B
$859K ﹤0.01%
5,144
-1,675
-25% -$223K
34 35
36
37 38

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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.