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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
+10.3%
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
$25B
AUM Growth
+$2.04B
Cap. Flow
+$116M
Cap. Flow %
0.46%
Top 10 Hldgs %
23.68%
Holding
1,879
New
69
Increased
680
Reduced
748
Closed
78

Top Buys

Rank Stock Value
1
NEOG icon
Neogen
NEOG
+$45.2M
2
PGR icon
Progressive
PGR
+$34.8M
3
TOST icon
Toast
TOST
+$33.8M
4
PWSC
PowerSchool Holdings, Inc.
PWSC
+$33.4M
5
UBER icon
Uber
UBER
+$30.4M

Top Sells

Rank Stock Value
1
GOOG icon
Alphabet (Google) Class C
GOOG
+$54.2M
2
LULU icon
lululemon athletica
LULU
+$53.4M
3
PYPL icon
PayPal
PYPL
+$45.8M
4
BAH icon
Booz Allen Hamilton
BAH
+$20.2M
5
GOOGL icon
Alphabet (Google) Class A
GOOGL
+$17.8M

Sector Composition

Rank Sector Weight
1 Technology 24.61%
2 Healthcare 19.42%
3 Financials 11.75%
4 Industrials 11.37%
5 Consumer Discretionary 8.4%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
LAZR
551
DELISTED
Luminar Technologies
LAZR
$3.05M 0.01%
31,355
+9,546
+44% +$1M
GM icon
552
General Motors
GM
$76.3B
$3.04M 0.01%
82,923
-18,470
-18% -$698K
XLC icon
553
State Street Communication Services Select Sector SPDR ETF
XLC
$22.6B
$3.04M 0.01%
52,421
+37,032
+241% +$2.01M
BIIB icon
554
Biogen
BIIB
$31B
$3.03M 0.01%
10,912
+580
+6% +$160K
VOOV icon
555
Vanguard S&P 500 Value ETF
VOOV
$6.8B
$3.03M 0.01%
20,675
+2,861
+16% +$418K
AIZ icon
556
Assurant
AIZ
$13.9B
$3.03M 0.01%
25,207
-5,532
-18% -$692K
MELI icon
557
Mercado Libre
MELI
$93B
$3.01M 0.01%
2,286
-68
-3% -$77.4K
XLB icon
558
State Street Materials Select Sector SPDR ETF
XLB
$8.6B
$3.01M 0.01%
74,544
+37,928
+104% +$1.54M
KNX icon
559
Knight Transportation
KNX
$11.9B
$3M 0.01%
53,082
+1,256
+2% +$71.8K
RPAY icon
560
Repay Holdings
RPAY
$308M
$2.99M 0.01%
455,800
+53,826
+13% +$443K
PRFT
561
DELISTED
Perficient Inc
PRFT
$2.99M 0.01%
41,470
-17,732
-30% -$1.29M
CMI icon
562
Cummins
CMI
$87.5B
$2.98M 0.01%
12,487
+83
+0.7% +$20.3K
SCHB icon
563
Schwab US Broad Market ETF
SCHB
$45.1B
$2.97M 0.01%
186,228
+70,524
+61% +$1.1M
LSCC icon
564
Lattice Semiconductor
LSCC
$18.6B
$2.96M 0.01%
31,035
-48
-0.2% -$3.95K
ESGV icon
565
Vanguard ESG US Stock ETF
ESGV
$13.7B
$2.96M 0.01%
41,301
+762
+2% +$53.1K
NET icon
566
Cloudflare
NET
$116B
$2.95M 0.01%
47,777
-1,433
-3% -$78.4K
ELV icon
567
Elevance Health
ELV
$87B
$2.94M 0.01%
5,537
+448
+9% +$213K
GBCI icon
568
Glacier Bancorp
GBCI
$6.46B
$2.93M 0.01%
69,690
-1,350
-2% -$61.8K
CLBT icon
569
Cellebrite
CLBT
$2.62B
$2.92M 0.01%
478,811
-8,199
-2% -$44.4K
SOXX icon
570
iShares Semiconductor ETF
SOXX
$47.4B
$2.9M 0.01%
19,581
-165
-0.8% -$22.5K
SRPT icon
571
Sarepta Therapeutics
SRPT
$1.97B
$2.9M 0.01%
21,012
-711
-3% -$92.2K
PEN icon
572
Penumbra
PEN
$12.9B
$2.87M 0.01%
10,286
-2,457
-19% -$627K
CARR icon
573
Carrier Global
CARR
$52.1B
$2.86M 0.01%
62,547
+10,028
+19% +$449K
PBH icon
574
Prestige Consumer Healthcare
PBH
$2.45B
$2.85M 0.01%
45,490
+4,146
+10% +$259K
CNC icon
575
Centene
CNC
$32.9B
$2.85M 0.01%
45,067
-988
-2% -$70.1K
21 22
23
24 25

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William Blair & Company's Q1 2023 Portfolio in Review

As of Q1 2023, William Blair & Company held 1,879 positions worth $25B, up 8.9% from $23B the previous quarter. Its ten largest holdings account for 24% of the portfolio.

William Blair & Company's Q1 2023 filing shows 69 new, 680 increased, 748 reduced and 78 closed positions. Its largest new stake was Neogen: 2,404,277 shares worth $44.5M. The largest sale was Alphabet (Google) Class C, an estimated $54.2M.

By sector, the portfolio is most concentrated in Technology at 25% of assets, up from 22% a quarter earlier, followed by Healthcare and Financials.

  • William Blair & Company's largest Q1 2023 buy was Neogen: 2,404,277 shares worth $44.5M.
  • William Blair & Company added most to Progressive in Q1 2023, an estimated $34.8M increase.
  • William Blair & Company's biggest Q1 2023 reduction was Alphabet (Google) Class C, cutting an estimated $54.2M.
  • William Blair & Company fully exited Coupa Software Incorporated in Q1 2023, selling an estimated $2.65M.
  • William Blair & Company's ten largest holdings make up 24% of its $25B portfolio in Q1 2023.
  • William Blair & Company opened 69 new positions and closed 78 in Q1 2023.
  • William Blair & Company's portfolio value rose 8.9% quarter-over-quarter to $25B.

Based on William Blair & Company's 13F filing for Q1 2023, filed 12 May 2023.