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William Blair Investment Management Portfolio holdings
AUM
$33.3B
1-Year Est. Return
44.76%
This Fund
S&P 500
This Quarter
Est. Return
-6.4%
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
$35.6B
AUM Growth
-$5.32B
(-13%)
Cap. Flow
-$1.91B
Cap. Flow
% of AUM
-5.36%
Top 10 Holdings %
Top 10 Hldgs %
26.78%
Holding
469
New
36
Increased
114
Reduced
269
Closed
46
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$515M |
| 2 |
Sea Limited
SE
|
+$179M |
| 3 |
Tyler Technologies
TYL
|
+$177M |
| 4 |
WAY
Waystar Holding Corp
WAY
|
+$167M |
| 5 |
Ciena
CIEN
|
+$159M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Advanced Micro Devices
AMD
|
+$229M |
| 2 |
Accenture
ACN
|
+$222M |
| 3 |
Penumbra
PEN
|
+$210M |
| 4 |
CF Industries
CF
|
+$201M |
| 5 |
Texas Instruments
TXN
|
+$184M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 32.57% |
| 2 | Consumer Discretionary | 15.58% |
| 3 | Financials | 13.1% |
| 4 | Healthcare | 12.15% |
| 5 | Industrials | 9.67% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
301
Procept Biorobotics
PRCT
$1.22B
| $18.7M | 0.05% |
321,304
+82,019
| +34% | +$5.6M |
|
302
Kinsale Capital Group
KNSL
$8.51B
| $18.3M | 0.05% |
37,659
+5,892
| +19% | +$2.64M |
|
|
THS
303
DELISTED
Treehouse Foods
THS
| $18.3M | 0.05% |
676,484
-222,052
| -25% | -$7.04M |
|
304
Onto Innovation
ONTO
$20.6B
| $17.8M | 0.05% |
+146,441
| New | +$24.7M |
|
|
BKV
305
BKV Corp
BKV
$2.86B
| $17.7M | 0.05% |
+845,041
| New | +$19.1M |
|
306
Signet Jewelers
SIG
$3.59B
| $17.6M | 0.05% |
303,589
-5,540
| -2% | -$317K |
|
307
Donnelley Financial Solutions
DFIN
$1.17B
| $17.1M | 0.05% |
391,512
+15,783
| +4% | +$874K |
|
308
SiTime
SITM
$20.5B
| $16.6M | 0.05% |
108,320
-40,285
| -27% | -$7.73M |
|
309
Conduent
CNDT
$241M
| $16.4M | 0.05% |
6,065,757
-279,895
| -4% | -$1.02M |
|
310
Winnebago Industries
WGO
$915M
| $16.3M | 0.05% |
474,284
-19,867
| -4% | -$842K |
|
|
GDEN
311
DELISTED
Golden Entertainment
GDEN
| $15.7M | 0.04% |
595,265
-342,086
| -36% | -$10.5M |
|
312
Monro
MNRO
$359M
| $15.6M | 0.04% |
1,074,725
-46,302
| -4% | -$885K |
|
313
Titan Machinery
TITN
$431M
| $15.1M | 0.04% |
884,452
-35,638
| -4% | -$589K |
|
314
Modine Manufacturing
MOD
$10.6B
| $14.7M | 0.04% |
191,308
-56,092
| -23% | -$5.53M |
|
315
iShares Russell 1000 Growth ETF
IWF
$128B
| $14.7M | 0.04% |
+162,400
| New | +$16M |
|
316
Watsco Inc
WSO
$12.8B
| $14.7M | 0.04% |
28,837
-23,627
| -45% | -$11.6M |
|
317
Netflix
NFLX
$309B
| $14.6M | 0.04% |
+156,970
| New | +$14.9M |
|
318
Carrier Global
CARR
$52B
| $14.4M | 0.04% |
+226,811
| New | +$15.1M |
|
319
Applied Materials
AMAT
$435B
| $14.3M | 0.04% |
98,398
+579
| +0.6% | +$97.4K |
|
320
Flywire
FLYW
$2.12B
| $14.2M | 0.04% |
1,497,586
-8,835,085
| -86% | -$139M |
|
321
El Pollo Loco
LOCO
$463M
| $13.8M | 0.04% |
1,344,351
-62,103
| -4% | -$702K |
|
322
GXO Logistics
GXO
$5.52B
| $13.6M | 0.04% |
348,661
-8,249
| -2% | -$345K |
|
323
Grupo Aeroportuario del Sureste
ASR
$8.24B
| $13.5M | 0.04% |
49,214
-119
| -0.2% | -$32.6K |
|
324
Cellebrite
CLBT
$3.8B
| $13.1M | 0.04% |
+673,651
| New | +$14.2M |
|
325
Sotera Health
SHC
$5.39B
| $12.8M | 0.04% |
1,101,604
-25,979
| -2% | -$334K |
|
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William Blair Investment Management's Q1 2025 Portfolio in Review
As of Q1 2025, William Blair Investment Management held 469 positions worth $35.6B, down 13% from $40.9B the previous quarter. Its ten largest holdings account for 27% of the portfolio.
William Blair Investment Management withdrew a net $1.91B in Q1 2025, closing 46 positions and reducing 269 holdings. Its most notable exit was Penumbra, an estimated $210M position sold in full.
By sector, the portfolio is most concentrated in Technology at 33% of assets, down from 34% a quarter earlier, followed by Consumer Discretionary and Financials.
Against the trend, William Blair Investment Management opened a new position in Waystar Holding Corp worth $158M.
- William Blair Investment Management's largest Q1 2025 buy was Waystar Holding Corp: 4,227,425 shares worth $158M.
- William Blair Investment Management added most to Broadcom in Q1 2025, an estimated $515M increase.
- William Blair Investment Management's biggest Q1 2025 reduction was Advanced Micro Devices, cutting an estimated $229M.
- William Blair Investment Management fully exited Penumbra in Q1 2025, selling an estimated $210M.
- William Blair Investment Management's ten largest holdings make up 27% of its $35.6B portfolio in Q1 2025.
- William Blair Investment Management opened 36 new positions and closed 46 in Q1 2025.
- William Blair Investment Management's portfolio value fell 13% quarter-over-quarter to $35.6B.
Based on William Blair Investment Management's 13F filing for Q1 2025, filed 9 May 2025.