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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
+10.07%
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
$31.8B
AUM Growth
+$2.49B
Cap. Flow
+$139M
Cap. Flow %
0.44%
Top 10 Hldgs %
23.43%
Holding
1,869
New
90
Increased
714
Reduced
722
Closed
82

Top Buys

Rank Stock Value
1
UBER icon
Uber
UBER
+$24.2M
2
IOT icon
Samsara
IOT
+$23.9M
3
PRCT icon
Procept Biorobotics
PRCT
+$20.5M
4
ISRG icon
Intuitive Surgical
ISRG
+$19.9M
5
AMZN icon
Amazon
AMZN
+$19.4M

Top Sells

Rank Stock Value
1
SPLK
Splunk Inc
SPLK
+$67.1M
2
MA icon
Mastercard
MA
+$65.4M
3
AON icon
Aon
AON
+$40.3M
4
FLYW icon
Flywire
FLYW
+$25.7M
5
DV icon
DoubleVerify
DV
+$19.5M

Sector Composition

Rank Sector Weight
1 Technology 25.75%
2 Healthcare 17.03%
3 Financials 12.35%
4 Industrials 11.88%
5 Consumer Discretionary 8.53%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
HEFA icon
526
iShares Currency Hedged MSCI EAFE ETF
HEFA
$7.8B
$3.92M 0.01%
112,429
-15,507
-12% -$511K
DDOG icon
527
Datadog
DDOG
$89.5B
$3.88M 0.01%
31,372
+686
+2% +$86.2K
PAPR icon
528
Innovator US Equity Power Buffer ETF April
PAPR
$962M
$3.87M 0.01%
115,306
+3,057
+3% +$101K
CYBR
529
DELISTED
CyberArk
CYBR
$3.86M 0.01%
14,515
+1,919
+15% +$475K
VOOV icon
530
Vanguard S&P 500 Value ETF
VOOV
$6.8B
$3.83M 0.01%
21,216
+78
+0.4% +$13.4K
BIV icon
531
Vanguard Intermediate-Term Bond ETF
BIV
$28.9B
$3.81M 0.01%
50,557
-44,664
-47% -$3.37M
PLD icon
532
Prologis
PLD
$135B
$3.8M 0.01%
29,186
+4,020
+16% +$525K
CEG icon
533
Constellation Energy
CEG
$98.7B
$3.79M 0.01%
20,507
+843
+4% +$120K
XLI icon
534
State Street Industrial Select Sector SPDR ETF
XLI
$34.6B
$3.79M 0.01%
30,094
-611
-2% -$71.9K
RPD icon
535
Rapid7
RPD
$868M
$3.78M 0.01%
77,016
+5,480
+8% +$301K
MUB icon
536
iShares National Muni Bond ETF
MUB
$45.9B
$3.77M 0.01%
35,030
+8,414
+32% +$908K
CGGR icon
537
Capital Group Growth ETF
CGGR
$25.2B
$3.76M 0.01%
117,406
+2,867
+3% +$86.2K
BBY icon
538
Best Buy
BBY
$17.8B
$3.75M 0.01%
45,704
-987
-2% -$75.1K
VDC icon
539
Vanguard Consumer Staples ETF
VDC
$8.02B
$3.75M 0.01%
18,358
+623
+4% +$122K
SHE icon
540
State Street SPDR MSCI USA Gender Diversity ETF
SHE
$340M
$3.74M 0.01%
35,283
+10,127
+40% +$1.02M
XLU icon
541
State Street Utilities Select Sector SPDR ETF
XLU
$22.9B
$3.73M 0.01%
113,748
-6,022
-5% -$188K
WEC icon
542
WEC Energy
WEC
$35.8B
$3.72M 0.01%
45,339
+347
+0.8% +$27.9K
PEN icon
543
Penumbra
PEN
$12.9B
$3.72M 0.01%
16,674
+3,257
+24% +$805K
LSTR icon
544
Landstar System
LSTR
$6.39B
$3.72M 0.01%
19,294
-20
-0.1% -$3.8K
UNF icon
545
Unifirst Corp
UNF
$5.24B
$3.71M 0.01%
21,373
-767
-3% -$130K
NAPR icon
546
Innovator Growth-100 Power Buffer ETF April
NAPR
$213M
$3.67M 0.01%
80,658
+78,065
+3,011% +$3.51M
COO icon
547
Cooper Companies
COO
$15B
$3.65M 0.01%
35,962
-14,342
-29% -$1.39M
CGUS icon
548
Capital Group Core Equity ETF
CGUS
$11.9B
$3.63M 0.01%
116,386
+22,727
+24% +$674K
LEN icon
549
Lennar Class A
LEN
$21.1B
$3.61M 0.01%
21,712
+276
+1% +$41.5K
MOAT icon
550
VanEck Morningstar Wide Moat ETF
MOAT
$12.4B
$3.61M 0.01%
40,156
+1,724
+4% +$148K
20 21
22
23 24

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William Blair & Company's Q1 2024 Portfolio in Review

As of Q1 2024, William Blair & Company held 1,869 positions worth $31.8B, up 8.5% from $29.3B the previous quarter. Its ten largest holdings account for 23% of the portfolio.

William Blair & Company's Q1 2024 filing shows 90 new, 714 increased, 722 reduced and 82 closed positions. Its largest new stake was Procept Biorobotics: 429,793 shares worth $21.2M. The largest sale was Splunk Inc, an estimated $67.1M.

By sector, the portfolio is most concentrated in Technology at 26% of assets, down from 26% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q1 2024 buy was Procept Biorobotics: 429,793 shares worth $21.2M.
  • William Blair & Company added most to Uber in Q1 2024, an estimated $24.2M increase.
  • William Blair & Company's biggest Q1 2024 reduction was Mastercard, cutting an estimated $65.4M.
  • William Blair & Company fully exited Splunk Inc in Q1 2024, selling an estimated $67.1M.
  • William Blair & Company's ten largest holdings make up 23% of its $31.8B portfolio in Q1 2024.
  • William Blair & Company opened 90 new positions and closed 82 in Q1 2024.
  • William Blair & Company's portfolio value rose 8.5% quarter-over-quarter to $31.8B.

Based on William Blair & Company's 13F filing for Q1 2024, filed 9 May 2024.