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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 | |
|---|---|---|---|---|---|---|
426
Agilysys
AGYS
$3.1B
| – | – |
-457,420
| Closed | -$60.2M |
|
427
Arista Networks
ANET
$264B
| – | – |
-235,813
| Closed | -$26.1M |
|
428
Booz Allen Hamilton
BAH
$9.47B
| – | – |
-166,769
| Closed | -$21.5M |
|
429
Bloomin' Brands
BLMN
$976M
| – | – |
-1,649,084
| Closed | -$20.1M |
|
430
Dutch Bros
BROS
$9.13B
| – | – |
-392,513
| Closed | -$20.6M |
|
431
Certara
CERT
$1.22B
| – | – |
-13,827
| Closed | -$147K |
|
|
432
CF Industries
CF
$17.8B
| – | – |
-2,354,192
| Closed | -$201M |
|
433
Celestica
CLS
$44B
| – | – |
-30,308
| Closed | -$2.8M |
|
434
Credo Technology Group
CRDO
$51.7B
| – | – |
-1,876,758
| Closed | -$126M |
|
435
Carter's
CRI
$1.45B
| – | – |
-530,582
| Closed | -$28.8M |
|
436
Cognizant
CTSH
$26.7B
| – | – |
-2,774
| Closed | -$213K |
|
|
EDN
437
Edenor
EDN
$1.02B
| – | – |
-116,791
| Closed | -$5.01M |
|
438
iShares MSCI EAFE ETF
EFA
$80.4B
| – | – |
-7,037
| Closed | -$532K |
|
439
Ferguson
FERG
$47.3B
| – | – |
-4,709
| Closed | -$819K |
|
440
Green Plains
GPRE
$1.07B
| – | – |
-178,791
| Closed | -$1.69M |
|
441
Haleon
HLN
$43.3B
| – | – |
-246,458
| Closed | -$2.35M |
|
442
iShares Russell 2000 Value ETF
IWN
$14.8B
| – | – |
-22,315
| Closed | -$3.66M |
|
443
Kornit Digital
KRNT
$855M
| – | – |
-383,252
| Closed | -$11.9M |
|
|
LOMA
444
Loma Negra
LOMA
$1.13B
| – | – |
-323,841
| Closed | -$3.87M |
|
445
Middleby
MIDD
$5.37B
| – | – |
-3,006
| Closed | -$407K |
|
446
Myers Industries
MYE
$1.26B
| – | – |
-1,310,361
| Closed | -$14.5M |
|
447
ON Semiconductor
ON
$32.6B
| – | – |
-3,253
| Closed | -$205K |
|
|
448
Penumbra
PEN
$12.9B
| – | – |
-883,098
| Closed | -$210M |
|
449
PRA Group
PRAA
$775M
| – | – |
-856,558
| Closed | -$17.9M |
|
450
Qorvo
QRVO
$8.68B
| – | – |
-4,573
| Closed | -$320K |
|
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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.