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William Blair Investment Management

William Blair Investment Management Portfolio holdings

AUM $33.3B
1-Year Est. Return 44.76%
This Fund
S&P 500
This Quarter Est. Return
+5.41%
1 Year Est. Return
+44.76%
3 Year Est. Return
+140.8%
5 Year Est. Return
+166.51%
10 Year Est. Return
+978.6%
AUM
$40.9B
AUM Growth
+$405M
Cap. Flow
-$285M
Cap. Flow %
-0.7%
Top 10 Hldgs %
27.41%
Holding
463
New
51
Increased
220
Reduced
159
Closed
30

Top Buys

Rank Stock Value
1
PRMB
Primo Brands
PRMB
+$331M
2
YUMC icon
Yum China
YUMC
+$240M
3
TLN
Talen Energy Corp
TLN
+$232M
4
MLI icon
Mueller Industries
MLI
+$206M
5
BAM icon
Brookfield Asset Management
BAM
+$203M

Top Sells

Rank Stock Value
1
ISRG icon
Intuitive Surgical
ISRG
+$315M
2
ICLR icon
Icon
ICLR
+$294M
3
ZTS icon
Zoetis
ZTS
+$230M
4
BWXT icon
BWX Technologies
BWXT
+$222M
5
PRMW
Primo Water Corporation
PRMW
+$197M

Sector Composition

Rank Sector Weight
1 Technology 34.12%
2 Consumer Discretionary 14.8%
3 Financials 12.22%
4 Healthcare 11.93%
5 Industrials 10.15%
Name Market Value Portfolio Weight Shares or Principal Change
in Stake 		Capital Flow
AUB icon
201
Atlantic Union Bankshares
AUB
$6.09B
$36.3M 0.09%
959,462
+185,662
+24% +$7.36M
VITL icon
202
Vital Farms
VITL
$498M
$36M 0.09%
955,895
+89,772
+10% +$3.19M
OSW icon
203
OneSpaWorld
OSW
$2.73B
$35.9M 0.09%
1,802,099
+103,799
+6% +$1.93M
EXTR icon
204
Extreme Networks
EXTR
$3.16B
$35.8M 0.09%
2,141,387
+52,621
+3% +$851K
WFRD icon
205
Weatherford International
WFRD
$6.6B
$35.8M 0.09%
500,005
+43,182
+9% +$3.54M
TT icon
206
Trane Technologies
TT
$105B
$35.5M 0.09%
96,054
-29,912
-24% -$11.9M
ZIP icon
207
ZipRecruiter
ZIP
$388M
$35.5M 0.09%
4,898,650
+388,773
+9% +$3.48M
FBNC icon
208
First Bancorp
FBNC
$2.74B
$35.1M 0.09%
797,316
+18,749
+2% +$838K
CSGS
209
DELISTED
CSG Systems International
CSGS
$35M 0.09%
685,750
+16,141
+2% +$831K
XPRO icon
210
Expro Ltd
XPRO
$2.1B
$35M 0.09%
2,809,682
+758,449
+37% +$10.6M
MUSA icon
211
Murphy USA
MUSA
$10.4B
$35M 0.09%
69,802
+728
+1% +$372K
LLY icon
212
Eli Lilly
LLY
$1.08T
$35M 0.09%
45,355
+18,193
+67% +$15.1M
HAE icon
213
Haemonetics
HAE
$4.11B
$34.8M 0.09%
446,258
+101,807
+30% +$8.18M
BRC icon
214
Brady Corp
BRC
$4.43B
$34.5M 0.08%
467,564
+11,316
+2% +$841K
ESE icon
215
ESCO Technologies
ESE
$7.79B
$34.5M 0.08%
258,729
-35,917
-12% -$4.88M
AWI icon
216
Armstrong World Industries
AWI
$7.68B
$34.4M 0.08%
243,527
-23,495
-9% -$3.45M
RUSHA icon
217
Rush Enterprises Class A
RUSHA
$9.62B
$34.4M 0.08%
627,268
-142,341
-18% -$8.13M
JPM icon
218
JPMorgan Chase
JPM
$965B
$34.3M 0.08%
+142,962
New +$33.3M
STEL
219
DELISTED
Stellar Bancorp
STEL
$34.3M 0.08%
1,208,750
+138,778
+13% +$3.95M
PNFP icon
220
Pinnacle Financial Partners Inc
PNFP
$16.2B
$34.1M 0.08%
298,212
-129,725
-30% -$14.6M
LNTH icon
221
Lantheus
LNTH
$6.59B
$34M 0.08%
380,324
+9,245
+2% +$901K
CMC icon
222
Commercial Metals
CMC
$7.98B
$34M 0.08%
685,155
+16,828
+3% +$949K
DBRG icon
223
DigitalBridge
DBRG
$2.94B
$33.9M 0.08%
3,003,062
+643,705
+27% +$8.65M
GGG icon
224
Graco
GGG
$13.3B
$33.5M 0.08%
397,303
+146,042
+58% +$12.7M
ALHC icon
225
Alignment Healthcare
ALHC
$2.79B
$33.4M 0.08%
2,972,647
+999,940
+51% +$11.7M
7 8
9
10 11

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William Blair Investment Management's Q4 2024 Portfolio in Review

As of Q4 2024, William Blair Investment Management held 463 positions worth $40.9B, up 1% from $40.5B the previous quarter. Its ten largest holdings account for 27% of the portfolio.

William Blair Investment Management's Q4 2024 filing shows 51 new, 220 increased, 159 reduced and 30 closed positions. Its largest new stake was Primo Brands: 11,161,870 shares worth $343M. The largest sale was Intuitive Surgical, an estimated $315M.

By sector, the portfolio is most concentrated in Technology at 34% of assets, down from 34% a quarter earlier, followed by Consumer Discretionary and Financials.

  • William Blair Investment Management's largest Q4 2024 buy was Primo Brands: 11,161,870 shares worth $343M.
  • William Blair Investment Management added most to West Pharmaceutical in Q4 2024, an estimated $177M increase.
  • William Blair Investment Management's biggest Q4 2024 reduction was Intuitive Surgical, cutting an estimated $315M.
  • William Blair Investment Management fully exited Primo Water Corporation in Q4 2024, selling an estimated $197M.
  • William Blair Investment Management's ten largest holdings make up 27% of its $40.9B portfolio in Q4 2024.
  • William Blair Investment Management opened 51 new positions and closed 30 in Q4 2024.
  • William Blair Investment Management's portfolio value rose 1% quarter-over-quarter to $40.9B.

Based on William Blair Investment Management's 13F filing for Q4 2024, filed 10 Feb 2025.