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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
PRO
576
DELISTED
PROS Holdings
PRO
$2.98M 0.01%
76,834
– –
SAIC icon
577
Saic
SAIC
$5.34B
$2.98M 0.01%
23,955
-314
-1% -$36.5K
CLF icon
578
Cleveland-Cliffs
CLF
$6.99B
$2.97M 0.01%
145,629
-1,962
-1% -$33.6K
BOX icon
579
Box
BOX
$4.48B
$2.96M 0.01%
115,727
-49,123
-30% -$1.24M
ITT icon
580
ITT
ITT
$19.4B
$2.95M 0.01%
24,727
-109
-0.4% -$11.5K
PSEP icon
581
Innovator US Equity Power Buffer ETF September
PSEP
$842M
$2.92M 0.01%
83,883
– –
AIZ icon
582
Assurant
AIZ
$13.9B
$2.9M 0.01%
17,197
-2,081
-11% -$331K
MUB icon
583
iShares National Muni Bond ETF
MUB
$45.9B
$2.89M 0.01%
26,616
+5,920
+29% +$619K
DAL icon
584
Delta Air Lines
DAL
$59.1B
$2.85M 0.01%
70,881
-5,798
-8% -$210K
IYW icon
585
iShares US Technology ETF
IYW
$25.4B
$2.85M 0.01%
23,224
-285
-1% -$32.3K
CNC icon
586
Centene
CNC
$33.1B
$2.84M 0.01%
38,235
-2,458
-6% -$177K
NET icon
587
Cloudflare
NET
$111B
$2.82M 0.01%
33,915
-8,224
-20% -$575K
TMUS icon
588
T-Mobile US
TMUS
$190B
$2.82M 0.01%
17,574
+1,503
+9% +$222K
AGL icon
589
Agilon Health
AGL
$1.45B
$2.8M 0.01%
8,939
-3,925
-31% -$1.42M
COF icon
590
Capital One
COF
$136B
$2.8M 0.01%
21,353
+379
+2% +$40.9K
WELL icon
591
Welltower
WELL
$166B
$2.8M 0.01%
31,004
+918
+3% +$79.6K
SCHF icon
592
Schwab International Equity ETF
SCHF
$69.1B
$2.78M 0.01%
150,630
+23,740
+19% +$412K
WSM icon
593
Williams-Sonoma
WSM
$28.9B
$2.78M 0.01%
27,566
+308
+1% +$26.7K
VT icon
594
Vanguard Total World Stock ETF
VT
$81.4B
$2.76M 0.01%
26,861
+16,616
+162% +$1.6M
PHM icon
595
Pultegroup
PHM
$24.6B
$2.76M 0.01%
26,753
+1,959
+8% +$166K
CYBR
596
DELISTED
CyberArk
CYBR
$2.76M 0.01%
12,596
-29
-0.2% -$5.38K
ROST icon
597
Ross Stores
ROST
$79.6B
$2.75M 0.01%
19,847
+342
+2% +$42.6K
DGRO icon
598
iShares Core Dividend Growth ETF
DGRO
$43.8B
$2.74M 0.01%
50,845
+53
+0.1% +$2.69K
VTEB icon
599
Vanguard Tax-Exempt Bond Index Fund
VTEB
$46B
$2.72M 0.01%
53,313
+5,660
+12% +$278K
HYG icon
600
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
$17.9B
$2.72M 0.01%
35,145
+1,501
+4% +$112K
22 23
24
25 26

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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.