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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 | |
|---|---|---|---|---|---|---|
326
iShares Russell 2000 Growth ETF
IWO
$15.1B
| $12.6M | 0.04% |
49,395
+15,883
| +47% | +$4.48M |
|
327
Zeta Global
ZETA
$7.29B
| $12.3M | 0.03% |
+908,623
| New | +$16.2M |
|
328
MillerKnoll
MLKN
$1.65B
| $12.1M | 0.03% |
632,978
-323,447
| -34% | -$6.88M |
|
329
ODDITY Tech
ODD
$620M
| $11.6M | 0.03% |
+267,457
| New | +$11.9M |
|
330
Hims & Hers Health
HIMS
$6.99B
| $11M | 0.03% |
370,699
-136,007
| -27% | -$5.05M |
|
331
Abbott
ABT
$194B
| $9.35M | 0.03% |
70,487
-34,570
| -33% | -$4.4M |
|
332
Standard Motor Products
SMP
$885M
| $8.4M | 0.02% |
337,135
-592,678
| -64% | -$17.4M |
|
333
Quanterix
QTRX
$147M
| $7.2M | 0.02% |
1,106,063
+43,958
| +4% | +$367K |
|
334
Workday
WDAY
$44.2B
| $6.66M | 0.02% |
28,529
-6,826
| -19% | -$1.74M |
|
335
Pampa Energía
PAM
$4.24B
| $6.5M | 0.02% |
84,190
-115,888
| -58% | -$9.62M |
|
|
HI
336
DELISTED
Hillenbrand
HI
| $6.42M | 0.02% |
266,142
-516,525
| -66% | -$15.7M |
|
|
337
Advanced Micro Devices
AMD
$807B
| $5.74M | 0.02% |
55,883
-2,062,244
| -97% | -$229M |
|
338
BBVA Argentina
BBAR
$3.28B
| $5.68M | 0.02% |
313,368
-706,910
| -69% | -$14.4M |
|
339
Banco Santander Chile
BSAC
$16B
| $5.26M | 0.01% |
+230,904
| New | +$4.93M |
|
340
Dr. Reddy's Laboratories
RDY
$10.4B
| $4.82M | 0.01% |
+365,494
| New | +$5.04M |
|
341
SAP
SAP
$237B
| $4.24M | 0.01% |
15,798
-1,488
| -9% | -$405K |
|
342
Kaspi.kz JSC
KSPI
$19.1B
| $4.22M | 0.01% |
45,460
+27,246
| +150% | +$2.67M |
|
343
Humana
HUM
$46.6B
| $3.66M | 0.01% |
13,828
-4,217
| -23% | -$1.14M |
|
344
Intercorp Financial Services
IFS
$5.96B
| $3.42M | 0.01% |
+103,365
| New | +$3.25M |
|
345
Eaton
ETN
$177B
| $3.28M | 0.01% |
12,052
-798
| -6% | -$248K |
|
346
MongoDB
MDB
$36.5B
| $3.21M | 0.01% |
18,292
-7,548
| -29% | -$1.84M |
|
347
Sumitomo Mitsui Financial
SMFG
$167B
| $3.13M | 0.01% |
202,146
-23,049
| -10% | -$351K |
|
348
ASML
ASML
$712B
| $2.79M | 0.01% |
4,215
-453
| -10% | -$330K |
|
349
Keysight
KEYS
$60.7B
| $2.6M | 0.01% |
17,367
+9,854
| +131% | +$1.63M |
|
350
Trip.com Group
TCOM
$28.4B
| $2.48M | 0.01% |
39,068
-4,851
| -11% | -$318K |
|
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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.