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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
TDUP icon
1551
ThredUp
TDUP
$405M
$66.4K ﹤0.01%
29,500
+17,500
+146% +$45.5K
PKW icon
1552
Invesco BuyBack Achievers ETF
PKW
$1.78B
$65.4K ﹤0.01%
660
– –
EWA icon
1553
iShares MSCI Australia ETF
EWA
$1.46B
$64.3K ﹤0.01%
2,643
+63
+2% +$1.4K
EWG icon
1554
iShares MSCI Germany ETF
EWG
$1.67B
$63.1K ﹤0.01%
2,127
-54
-2% -$1.47K
GALT icon
1555
Galectin Therapeutics
GALT
$317M
$62.9K ﹤0.01%
37,884
– –
UA icon
1556
Under Armour Class C
UA
$2.2B
$60.6K ﹤0.01%
7,254
+45
+0.6% +$325
PIZ icon
1557
Invesco Dorsey Wright Developed Markets Momentum ETF
PIZ
$742M
$60.3K ﹤0.01%
1,900
+50
+3% +$1.47K
IYY icon
1558
iShares Dow Jones US ETF
IYY
$3.07B
$59.4K ﹤0.01%
510
– –
AIVI icon
1559
WisdomTree International AI Enhanced Value Fund
AIVI
$63.1M
$58.7K ﹤0.01%
1,450
– –
RSPE icon
1560
Invesco ESG S&P 500 Equal Weight ETF
RSPE
$69.9M
$58.6K ﹤0.01%
2,416
– –
SCHC icon
1561
Schwab International Small-Cap Equity ETF
SCHC
$5.67B
$57.3K ﹤0.01%
1,641
+118
+8% +$3.83K
LRGF icon
1562
iShares US Equity Factor ETF
LRGF
$3.71B
$57.2K ﹤0.01%
1,185
– –
LLYVK icon
1563
Liberty Live Group Series C
LLYVK
$9.8B
$54.5K ﹤0.01%
1,456
-7
-0.5% -$238
HEWG
1564
DELISTED
iShares Currency Hedged MSCI Germany ETF
HEWG
$52K ﹤0.01%
1,610
– –
TBF icon
1565
ProShares Short 20+ Year Treasury ETF
TBF
$106M
$52K ﹤0.01%
2,350
– –
EWJV icon
1566
iShares MSCI Japan Value ETF
EWJV
$754M
$51.1K ﹤0.01%
1,750
– –
LNAI
1567
Lunai Bioworks
LNAI
$10.7M
$51K ﹤0.01%
201
-124
-38% -$34K
RSPM icon
1568
Invesco S&P 500 Equal Weight Materials ETF
RSPM
$184M
$50.8K ﹤0.01%
1,510
-1,486
-50% -$46.4K
OPEN icon
1569
Opendoor
OPEN
$3.39B
$50.8K ﹤0.01%
11,707
-16,874
-59% -$47.1K
BMVP icon
1570
Invesco Bloomberg MVP Multi-factor ETF
BMVP
$106M
$49.2K ﹤0.01%
1,215
+225
+23% +$8.51K
JETS icon
1571
US Global Jets ETF
JETS
$825M
$49.2K ﹤0.01%
2,586
-1,413
-35% -$23.9K
EDIV icon
1572
State Street SPDR S&P Emerging Markets Dividend ETF
EDIV
$1.22B
$48.8K ﹤0.01%
1,502
– –
OXY.WS icon
1573
Occidental Petroleum Corp Warrants
OXY.WS
$34.4B
$48.6K ﹤0.01%
1,248
-134
-10% -$5.25K
ITEQ icon
1574
Amplify BlueStar Israel Technology ETF
ITEQ
$118M
$48.4K ﹤0.01%
1,050
+50
+5% +$2.05K
DNA icon
1575
Ginkgo Bioworks
DNA
$486M
$48K ﹤0.01%
710
-83
-10% -$5.08K
61 62
63
64 65

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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.