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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
VIS icon
501
Vanguard Industrials ETF
VIS
$8.5B
$4.13M 0.01%
18,740
-36
-0.2% -$7.25K
CTVA icon
502
Corteva
CTVA
$50.4B
$4.11M 0.01%
85,851
-3,707
-4% -$177K
FCN icon
503
FTI Consulting
FCN
$4.22B
$4.09M 0.01%
20,537
-538
-3% -$111K
RPD icon
504
Rapid7
RPD
$827M
$4.08M 0.01%
71,536
-2,510
-3% -$131K
HLNE icon
505
Hamilton Lane
HLNE
$5.69B
$4.08M 0.01%
35,973
+2,365
+7% +$224K
LRN icon
506
Stride
LRN
$3.27B
$4.06M 0.01%
68,421
-275
-0.4% -$15.1K
VYMI icon
507
Vanguard International High Dividend Yield ETF
VYMI
$21.3B
$4.06M 0.01%
61,037
-3,164
-5% -$199K
UNF icon
508
Unifirst Corp
UNF
$5.24B
$4.05M 0.01%
22,140
+242
+1% +$41.3K
HEFA icon
509
iShares Currency Hedged MSCI EAFE ETF
HEFA
$7.79B
$4.03M 0.01%
127,936
-33,527
-21% -$1.02M
VHT icon
510
Vanguard Health Care ETF
VHT
$19B
$4.02M 0.01%
16,045
-855
-5% -$202K
F icon
511
Ford
F
$55.1B
$4.02M 0.01%
329,777
-39,913
-11% -$444K
CBZ icon
512
CBIZ
CBZ
$2.96B
$4.02M 0.01%
64,223
+5,607
+10% +$317K
URI icon
513
United Rentals
URI
$70.3B
$4.02M 0.01%
7,007
+388
+6% +$183K
COWZ icon
514
Pacer US Cash Cows 100 ETF
COWZ
$19.6B
$3.96M 0.01%
76,075
+13,467
+22% +$669K
LRCX icon
515
Lam Research
LRCX
$408B
$3.94M 0.01%
50,320
+2,100
+4% +$143K
DSI icon
516
iShares MSCI KLD 400 Social ETF
DSI
$5.54B
$3.94M 0.01%
43,250
+1,306
+3% +$111K
CLBT icon
517
Cellebrite
CLBT
$3.8B
$3.92M 0.01%
453,149
-3,253
-0.7% -$25.3K
ZBH icon
518
Zimmer Biomet
ZBH
$18.7B
$3.92M 0.01%
32,180
+5,650
+21% +$630K
IMGN
519
DELISTED
Immunogen Inc
IMGN
$3.88M 0.01%
130,723
-123,597
-49% -$2.46M
CIGI icon
520
Colliers International
CIGI
$5.15B
$3.87M 0.01%
30,613
+4,176
+16% +$429K
SOXX icon
521
iShares Semiconductor ETF
SOXX
$46.2B
$3.85M 0.01%
20,058
-294
-1% -$49.3K
XLU icon
522
State Street Utilities Select Sector SPDR ETF
XLU
$22.8B
$3.79M 0.01%
119,770
+2,142
+2% +$65.5K
WEC icon
523
WEC Energy
WEC
$35.6B
$3.79M 0.01%
44,992
+3,416
+8% +$281K
GKOS icon
524
Glaukos
GKOS
$11B
$3.75M 0.01%
47,127
-9,485
-17% -$647K
LSTR icon
525
Landstar System
LSTR
$6.31B
$3.74M 0.01%
19,314
-2,227
-10% -$394K
19 20
21
22 23

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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.