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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
CAKE icon
276
Cheesecake Factory
CAKE
$5.84B
$26.5M 0.06%
558,343
-104,037
-16% -$4.79M
WERN icon
277
Werner Enterprises
WERN
$2.27B
$26.4M 0.06%
735,695
+15,800
+2% +$605K
HELE icon
278
Helen of Troy
HELE
$696M
$26.4M 0.06%
440,851
+8,597
+2% +$572K
ANET icon
279
Arista Networks
ANET
$265B
$26.1M 0.06%
235,813
+71,561
+44% +$7.36M
SILA
280
DELISTED
Sila Realty Trust
SILA
$25.9M 0.06%
+1,065,712
New +$26.9M
NEE icon
281
NextEra Energy
NEE
$179B
$25.8M 0.06%
359,893
-23,393
-6% -$1.82M
FROG icon
282
JFrog
FROG
$10.4B
$25.8M 0.06%
876,440
+69,627
+9% +$2.11M
CNDT icon
283
Conduent
CNDT
$241M
$25.6M 0.06%
6,345,652
+154,953
+3% +$616K
SIG icon
284
Signet Jewelers
SIG
$3.59B
$24.9M 0.06%
309,129
+76,966
+33% +$7.17M
WSO icon
285
Watsco Inc
WSO
$12.8B
$24.9M 0.06%
52,464
-22,083
-30% -$11.2M
THR
286
DELISTED
Thermon Group Holdings
THR
$24.7M 0.06%
857,633
+6,821
+0.8% +$201K
GTLB icon
287
GitLab
GTLB
$6.89B
$24.5M 0.06%
434,061
-334
-0.1% -$19.5K
ATAT icon
288
Atour Lifestyle Holdings
ATAT
$4.6B
$24.4M 0.06%
+908,692
New +$24.4M
HI
289
DELISTED
Hillenbrand
HI
$24.1M 0.06%
782,667
+14,256
+2% +$431K
DSGX icon
290
Descartes Systems
DSGX
$6.65B
$24.1M 0.06%
212,022
-162
-0.1% -$18.1K
CGNT icon
291
Cognyte Software
CGNT
$675M
$23.7M 0.06%
2,742,843
+67,024
+3% +$506K
JBTM
292
JBT Marel
JBTM
$6.15B
$23.6M 0.06%
+185,952
New +$21.5M
BLFS icon
293
BioLife Solutions
BLFS
$1.71B
$23.6M 0.06%
910,348
-239,100
-21% -$5.95M
WGO icon
294
Winnebago Industries
WGO
$915M
$23.6M 0.06%
494,151
+10,202
+2% +$578K
DFIN icon
295
Donnelley Financial Solutions
DFIN
$1.17B
$23.6M 0.06%
375,729
+53,665
+17% +$3.35M
MRTN icon
296
Marten Transport
MRTN
$1.22B
$23.3M 0.06%
1,492,142
+31,303
+2% +$522K
COCO icon
297
Vita Coco
COCO
$3.85B
$23M 0.06%
623,403
-145,232
-19% -$4.84M
FUTU icon
298
Futu Holdings
FUTU
$14.7B
$22.8M 0.06%
285,120
+265,120
+1,326% +$24.8M
AVNS
299
DELISTED
Avanos Medical
AVNS
$22.4M 0.05%
1,406,210
+28,608
+2% +$566K
GDYN icon
300
Grid Dynamics Holdings
GDYN
$632M
$22.2M 0.05%
+997,825
New +$17.4M
10 11
12
13 14

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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.