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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
OPLN
251
Openlane
OPLN
$4.34B
$29.6M 0.07%
1,493,988
+35,164
+2% +$649K
GDEN
252
DELISTED
Golden Entertainment
GDEN
$29.6M 0.07%
937,351
-641,688
-41% -$20.4M
ELME
253
Elme Communities
ELME
$144M
$29.5M 0.07%
1,934,863
+46,755
+2% +$774K
EPC icon
254
Edgewell Personal Care
EPC
$1.32B
$29.5M 0.07%
878,390
+253,014
+40% +$8.94M
NWE icon
255
NorthWestern Energy
NWE
$4.34B
$29.5M 0.07%
552,052
+13,352
+2% +$726K
PWP icon
256
Perella Weinberg Partners
PWP
$1.28B
$29.5M 0.07%
1,236,570
+30,441
+3% +$706K
SANM icon
257
Sanmina
SANM
$11.2B
$29.4M 0.07%
388,978
+9,016
+2% +$672K
DIOD icon
258
Diodes
DIOD
$4.93B
$29.4M 0.07%
476,263
+13,310
+3% +$830K
JLL icon
259
Jones Lang LaSalle
JLL
$16.7B
$29.3M 0.07%
+115,633
New +$30.8M
PEB icon
260
Pebblebrook Hotel Trust
PEB
$2.04B
$29.3M 0.07%
2,159,201
+49,183
+2% +$650K
OXM icon
261
Oxford Industries
OXM
$538M
$29M 0.07%
367,623
+8,399
+2% +$659K
DLX icon
262
Deluxe
DLX
$1.09B
$28.9M 0.07%
1,280,259
+31,288
+3% +$672K
SMP icon
263
Standard Motor Products
SMP
$877M
$28.8M 0.07%
929,813
+19,180
+2% +$617K
PDFS icon
264
PDF Solutions
PDFS
$2.19B
$28.8M 0.07%
1,063,583
+161,306
+18% +$4.86M
CRI icon
265
Carter's
CRI
$1.43B
$28.8M 0.07%
530,582
+9,675
+2% +$554K
MOD icon
266
Modine Manufacturing
MOD
$10.6B
$28.7M 0.07%
247,400
+17,599
+8% +$2.26M
SM icon
267
SM Energy
SM
$7.71B
$28.4M 0.07%
733,538
-243,682
-25% -$10.3M
STEP icon
268
StepStone Group
STEP
$3.96B
$28.4M 0.07%
491,183
+69,513
+16% +$4.31M
SHO icon
269
Sunstone Hotel Investors
SHO
$2.01B
$28.3M 0.07%
2,387,239
+58,234
+3% +$635K
MNRO icon
270
Monro
MNRO
$359M
$27.8M 0.07%
1,121,027
+23,184
+2% +$635K
ECVT icon
271
Ecovyst
ECVT
$1.09B
$27.5M 0.07%
3,601,346
+67,338
+2% +$498K
ONT
272
Onterris Inc
ONT
$576M
$27.3M 0.07%
1,469,280
+934,938
+175% +$19.7M
ANIP icon
273
ANI Pharmaceuticals
ANIP
$1.73B
$26.8M 0.07%
485,268
+10,440
+2% +$599K
REXR icon
274
Rexford Industrial Realty
REXR
$8.11B
$26.8M 0.07%
692,561
+2,452
+0.4% +$105K
CENTA icon
275
Central Garden & Pet Co Class A
CENTA
$2.43B
$26.6M 0.07%
805,564
+17,530
+2% +$558K
9 10
11
12 13

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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.