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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
UAA icon
1401
Under Armour
UAA
$2.29B
$195K ﹤0.01%
22,208
-27,537
-55% -$212K
SCHH icon
1402
Schwab US REIT ETF
SCHH
$11.4B
$194K ﹤0.01%
9,352
-92
-1% -$1.71K
CRDF icon
1403
Cardiff Oncology
CRDF
$79.4M
$192K ﹤0.01%
130,000
-500
-0.4% -$605
SLYG icon
1404
State Street SPDR S&P 600 Small Cap Growth ETF
SLYG
$5.23B
$187K ﹤0.01%
2,235
+2,019
+935% +$151K
XAR icon
1405
State Street SPDR S&P Aerospace & Defense ETF
XAR
$6.58B
$185K ﹤0.01%
1,367
-135
-9% -$16.6K
EZU icon
1406
iShare MSCI Eurozone ETF
EZU
$9.95B
$184K ﹤0.01%
3,885
+166
+4% +$7.31K
ICVT icon
1407
iShares Convertible Bond ETF
ICVT
$7.67B
$184K ﹤0.01%
2,341
– –
TILT icon
1408
FlexShares Morningstar US Market Factors Tilt Index Fund
TILT
$2.26B
$184K ﹤0.01%
1,008
-8
-0.8% -$1.35K
EMB icon
1409
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$15B
$183K ﹤0.01%
2,057
-63
-3% -$5.31K
IFRA icon
1410
iShares US Infrastructure ETF
IFRA
$4.63B
$183K ﹤0.01%
4,541
+720
+19% +$26.8K
VMD icon
1411
Viemed Healthcare
VMD
$360M
$181K ﹤0.01%
23,000
– –
NN icon
1412
NextNav
NN
$3.15B
$178K ﹤0.01%
40,000
– –
TLH icon
1413
iShares 10-20 Year Treasury Bond ETF
TLH
$10.9B
$178K ﹤0.01%
1,643
-150
-8% -$15K
GFI icon
1414
Gold Fields
GFI
$35.3B
$178K ﹤0.01%
12,297
-11
-0.1% -$152
AUTL
1415
Autolus Therapeutics
AUTL
$599M
$175K ﹤0.01%
27,107
+14,000
+107% +$53.4K
FNDA icon
1416
Schwab Fundamental US Small Company Index ETF
FNDA
$9.43B
$174K ﹤0.01%
6,302
+1,052
+20% +$26.1K
OSBC icon
1417
Old Second Bancorp
OSBC
$1.31B
$171K ﹤0.01%
11,082
+2
+0% +$29
SURG icon
1418
SurgePays
SURG
$6.9M
$170K ﹤0.01%
26,327
– –
TAK icon
1419
Takeda Pharmaceutical
TAK
$55.7B
$169K ﹤0.01%
11,872
+203
+2% +$2.88K
IXC icon
1420
iShares Global Energy ETF
IXC
$2.73B
$169K ﹤0.01%
4,327
– –
RMAX icon
1421
RE/MAX Holdings
RMAX
$264M
$168K ﹤0.01%
+12,635
New +$139K
ACVA icon
1422
ACV Auctions
ACVA
$1.39B
$168K ﹤0.01%
+11,065
New +$162K
EMLP icon
1423
First Trust North American Energy Infrastructure Fund
EMLP
$4.16B
$167K ﹤0.01%
6,048
+298
+5% +$8.03K
IEV icon
1424
iShares Europe ETF
IEV
$1.7B
$167K ﹤0.01%
3,151
– –
OPK icon
1425
Opko Health
OPK
$1.05B
$166K ﹤0.01%
109,786
– –
55 56
57
58 59

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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.