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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
PRCT icon
176
Procept Biorobotics
PRCT
$1.22B
$33.6M 0.1%
417,894
-8,019
-2% -$685K
CME icon
177
CME Group
CME
$94.3B
$33.3M 0.1%
143,384
-29,167
-17% -$6.71M
MZTI
178
The Marzetti Company
MZTI
$3.18B
$33.3M 0.1%
192,051
+5,916
+3% +$1.08M
IOT icon
179
Samsara
IOT
$22.9B
$32.9M 0.1%
753,156
-14,999
-2% -$738K
FIS icon
180
Fidelity National Information Services
FIS
$21.6B
$32.8M 0.1%
406,420
+9,772
+2% +$841K
GE icon
181
GE Aerospace
GE
$379B
$31.6M 0.09%
189,437
+6,918
+4% +$1.23M
AMD icon
182
Advanced Micro Devices
AMD
$788B
$30.7M 0.09%
254,372
+6,847
+3% +$985K
CW icon
183
Curtiss-Wright
CW
$26.7B
$30.3M 0.09%
85,330
+31,496
+59% +$11.3M
DT icon
184
Dynatrace
DT
$14.3B
$30.1M 0.09%
553,493
-61,927
-10% -$3.38M
APD icon
185
Air Products & Chemicals
APD
$67.7B
$29.9M 0.09%
103,125
+1,208
+1% +$379K
NEE icon
186
NextEra Energy
NEE
$179B
$29.3M 0.09%
409,136
-18,414
-4% -$1.43M
DVAX
187
DELISTED
Dynavax Technologies
DVAX
$28.9M 0.08%
2,261,677
-89,031
-4% -$1.08M
VO icon
188
Vanguard Morningstar Mid-Cap ETF
VO
$110B
$28.3M 0.08%
428,492
+21,088
+5% +$1.43M
ETN icon
189
Eaton
ETN
$179B
$27.5M 0.08%
82,888
+20,275
+32% +$7.12M
LMT icon
190
Lockheed Martin
LMT
$140B
$27.5M 0.08%
56,577
+897
+2% +$489K
BSV icon
191
Vanguard Short-Term Bond ETF
BSV
$45.6B
$27.2M 0.08%
352,539
-49,884
-12% -$3.87M
CHWY icon
192
Chewy
CHWY
$9.15B
$26.7M 0.08%
797,693
-18,480
-2% -$575K
EPD icon
193
Enterprise Products Partners
EPD
$81.9B
$26.6M 0.08%
847,820
+6,142
+0.7% +$189K
KMB icon
194
Kimberly-Clark
KMB
$36.2B
$26.4M 0.08%
201,252
-7,888
-4% -$1.08M
AJG icon
195
Arthur J. Gallagher & Co
AJG
$65.5B
$26.3M 0.08%
92,499
+3,465
+4% +$1.01M
IWB icon
196
iShares Russell 1000 ETF
IWB
$50.2B
$26.2M 0.08%
81,284
-529
-0.6% -$171K
VZ icon
197
Verizon
VZ
$195B
$25.8M 0.08%
646,163
-6,282
-1% -$265K
MU icon
198
Micron Technology
MU
$1.03T
$25.3M 0.07%
300,321
-2,564
-0.8% -$261K
VWO icon
199
Vanguard FTSE Emerging Markets ETF
VWO
$126B
$25.3M 0.07%
573,869
+1,380
+0.2% +$64.1K
MKC icon
200
McCormick & Company Non-Voting
MKC
$14.2B
$25.1M 0.07%
328,863
-179,480
-35% -$14.1M
6 7
8
9 10

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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.