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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
IDEV icon
1751
iShares Core MSCI International Developed Markets ETF
IDEV
$32.7B
$1.03K ﹤0.01%
16
-714
-98% -$42.6K
FALN icon
1752
iShares Fallen Angels USD Bond ETF
FALN
$1.6B
$950 ﹤0.01%
+36
New +$910
IGLB icon
1753
iShares 10+ Year Investment Grade Corporate Bond ETF
IGLB
$2.78B
$948 ﹤0.01%
18
-6
-25% -$290
GENZ
1754
VanEck Digital Native Economy ETF
GENZ
$17.5M
$846 ﹤0.01%
20
– –
HYEM icon
1755
VanEck Emerging Markets High Yield Bond ETF
HYEM
$526M
$831 ﹤0.01%
45
+1
+2% +$18
PIIIW icon
1756
P3 Health Partners Inc Warrant
PIIIW
$199K
$814 ﹤0.01%
7,765
– –
DFNM icon
1757
Dimensional National Municipal Bond ETF
DFNM
$2.26B
$776 ﹤0.01%
16
+11
+220% +$520
RYLD icon
1758
Global X Russell 2000 Covered Call ETF
RYLD
$1.39B
$737 ﹤0.01%
44
+9
+26% +$149
AGGY icon
1759
WisdomTree Yield Enhanced US Aggregate Bond Fund
AGGY
$923M
$570 ﹤0.01%
13
-5,107
-100% -$215K
UPRO icon
1760
ProShares UltraPro S&P 500
UPRO
$5.74B
$510 ﹤0.01%
9
– –
BUZZ icon
1761
VanEck Social Sentiment ETF
BUZZ
$101M
$411 ﹤0.01%
22
– –
CHGG icon
1762
Chegg
CHGG
$88.9M
$375 ﹤0.01%
33
-18
-35% -$171
PSR icon
1763
Invesco Active US Real Estate Fund
PSR
$59.2M
$366 ﹤0.01%
4
– –
RESE
1764
DELISTED
WisdomTree Emerging Markets ESG Fund
RESE
$188 ﹤0.01%
6
-1,785
-100% -$49.2K
SPTM icon
1765
State Street SPDR Portfolio S&P 1500 Composite Stock Market ETF
SPTM
$14.1B
$117 ﹤0.01%
2
-4
-67% -$218
ISPOW
1766
DELISTED
Inspirato Inc Warrant
ISPOW
$83 ﹤0.01%
15,000
– –
SRS icon
1767
ProShares UltraShort Real Estate
SRS
$16.1M
$71 ﹤0.01%
1
– –
GWH.WS
1768
DELISTED
ESS Tech Inc Warrant
GWH.WS
$59 ﹤0.01%
716
-202,126
-100% -$24.5K
ACES icon
1769
ALPS Clean Energy ETF
ACES
$124M
– –
-358
Closed -$13.1K
AMWL icon
1770
American Well
AMWL
$215M
– –
-770
Closed -$18K
ARE icon
1771
Alexandria Real Estate Equities
ARE
$8.27B
– –
-2,943
Closed -$295K
ARWR icon
1772
Arrowhead Research
ARWR
$12.3B
– –
-11,660
Closed -$313K
AVIR icon
1773
Atea Pharmaceuticals
AVIR
$405M
– –
-10,444
Closed -$31.3K
BAND
1774
Bandwidth Inc
BAND
$1.67B
– –
-27,349
Closed -$308K
BRLT icon
1775
Brilliant Earth
BRLT
$22.1M
– –
-115,587
Closed -$341K
69 70
71
72 73

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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.