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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
+3.1%
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
$34.4B
AUM Growth
+$328M
Cap. Flow
-$18.6M
Cap. Flow %
-0.05%
Top 10 Hldgs %
25.12%
Holding
1,903
New
83
Increased
650
Reduced
792
Closed
87

Top Buys

Rank Stock Value
1
XYZ
Block Inc
XYZ
+$80.6M
2
BLK icon
Blackrock
BLK
+$53.4M
3
CWAN
Clearwater Analytics
CWAN
+$48.5M
4
NVDA icon
NVIDIA
NVDA
+$47.9M
5
BWXT icon
BWX Technologies
BWXT
+$47M

Top Sells

Rank Stock Value
1
DXCM icon
DexCom
DXCM
+$37.7M
2
CSGP icon
CoStar Group
CSGP
+$34.5M
3
VRTX icon
Vertex Pharmaceuticals
VRTX
+$30M
4
BAH icon
Booz Allen Hamilton
BAH
+$29.1M
5
IDXX icon
Idexx Laboratories
IDXX
+$26.6M

Sector Composition

Rank Sector Weight
1 Technology 28.35%
2 Financials 13.43%
3 Healthcare 12.44%
4 Industrials 11.81%
5 Consumer Discretionary 8.44%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
ROKU icon
626
Roku
ROKU
$22.8B
$2.96M 0.01%
39,858
-2,288
-5% -$173K
ZNOV
627
Innovator Equity Defined Protection ETF - 1 Yr November
ZNOV
$105M
$2.95M 0.01%
+117,529
New +$2.95M
VGIT icon
628
Vanguard Intermediate-Term Treasury ETF
VGIT
$42.5B
$2.93M 0.01%
50,577
-2,298
-4% -$135K
OPRX icon
629
OptimizeRx
OPRX
$157M
$2.92M 0.01%
601,383
-75,711
-11% -$423K
DIVO icon
630
Amplify CWP Enhanced Dividend Income ETF
DIVO
$7.83B
$2.91M 0.01%
71,892
+369
+0.5% +$15.3K
CALF icon
631
Pacer US Small Cap Cash Cows 100 ETF
CALF
$3.85B
$2.9M 0.01%
65,876
+8,004
+14% +$370K
VDC icon
632
Vanguard Consumer Staples ETF
VDC
$8.01B
$2.89M 0.01%
13,688
-19
-0.1% -$4.12K
LEN icon
633
Lennar Class A
LEN
$21B
$2.89M 0.01%
21,882
+49
+0.2% +$7.96K
PMAR icon
634
Innovator US Equity Power Buffer ETF March
PMAR
$771M
$2.87M 0.01%
71,340
– –
ENVX icon
635
Enovix
ENVX
$1B
$2.84M 0.01%
298,649
-9,486
-3% -$83.3K
ELS icon
636
Equity Lifestyle Properties
ELS
$12.6B
$2.84M 0.01%
42,645
-11
-0% -$763
VCSH icon
637
Vanguard Short-Term Corporate Bond ETF
VCSH
$45.1B
$2.83M 0.01%
36,314
+17,487
+93% +$1.37M
SUSA icon
638
iShares ESG Optimized MSCI USA ETF
SUSA
$4.2B
$2.83M 0.01%
23,296
-226
-1% -$27.7K
PDP icon
639
Invesco Dorsey Wright Momentum ETF
PDP
$1.54B
$2.83M 0.01%
26,275
-375
-1% -$41.2K
TDUP icon
640
ThredUp
TDUP
$414M
$2.82M 0.01%
2,030,276
-180,794
-8% -$203K
AIR icon
641
AAR Corp
AIR
$5.86B
$2.82M 0.01%
45,962
+10,280
+29% +$659K
ALNY icon
642
Alnylam Pharmaceuticals
ALNY
$30.3B
$2.81M 0.01%
11,962
-1,372
-10% -$361K
ITA icon
643
iShares US Aerospace & Defense ETF
ITA
$14.9B
$2.78M 0.01%
19,130
+2,776
+17% +$418K
VTWO icon
644
Vanguard Russell 2000 ETF
VTWO
$17.5B
$2.77M 0.01%
31,057
+5,629
+22% +$519K
GCMG icon
645
GCM Grosvenor
GCMG
$2.81B
$2.77M 0.01%
225,695
+1,270
+0.6% +$15.1K
III icon
646
Information Services Group
III
$244M
$2.76M 0.01%
827,238
-6,585
-0.8% -$22K
WY icon
647
Weyerhaeuser
WY
$17.9B
$2.72M 0.01%
96,579
-23,880
-20% -$745K
EPI icon
648
WisdomTree India Earnings Fund ETF
EPI
$2.04B
$2.71M 0.01%
59,936
+1,147
+2% +$54.4K
IDV icon
649
iShares International Select Dividend ETF
IDV
$8.53B
$2.71M 0.01%
98,905
+10,140
+11% +$290K
CBRE icon
650
CBRE Group
CBRE
$43.2B
$2.69M 0.01%
20,478
+11,443
+127% +$1.5M
24 25
26
27 28

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William Blair & Company's Q4 2024 Portfolio in Review

As of Q4 2024, William Blair & Company held 1,903 positions worth $34.4B, up 0.96% from $34.1B the previous quarter. Its ten largest holdings account for 25% of the portfolio.

William Blair & Company's Q4 2024 filing shows 83 new, 650 increased, 792 reduced and 87 closed positions. Its largest new stake was Blackrock: 52,623 shares worth $53.9M. The largest sale was DexCom, an estimated $37.7M.

By sector, the portfolio is most concentrated in Technology at 28% of assets, up from 27% a quarter earlier, followed by Financials and Healthcare.

  • William Blair & Company's largest Q4 2024 buy was Blackrock: 52,623 shares worth $53.9M.
  • William Blair & Company added most to Block Inc in Q4 2024, an estimated $80.6M increase.
  • William Blair & Company's biggest Q4 2024 reduction was DexCom, cutting an estimated $37.7M.
  • William Blair & Company fully exited Rush Street Interactive in Q4 2024, selling an estimated $5.79M.
  • William Blair & Company's ten largest holdings make up 25% of its $34.4B portfolio in Q4 2024.
  • William Blair & Company opened 83 new positions and closed 87 in Q4 2024.
  • William Blair & Company's portfolio value rose 0.96% quarter-over-quarter to $34.4B.

Based on William Blair & Company's 13F filing for Q4 2024, filed 12 Feb 2025.