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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 | |
|---|---|---|---|---|---|---|
|
101
Accenture
ACN
$110B
| $97.4M | 0.27% |
312,019
-627,404
| -67% | -$222M |
|
|
EXAS
102
DELISTED
Exact Sciences
EXAS
| $97.4M | 0.27% |
2,249,038
-1,195,473
| -35% | -$60.5M |
|
103
Alphabet (Google) Class A
GOOGL
$4.21T
| $96.1M | 0.27% |
621,388
-209,316
| -25% | -$38M |
|
104
AppFolio
APPF
$6.98B
| $92.9M | 0.26% |
+422,594
| New | +$96.9M |
|
105
Jones Lang LaSalle
JLL
$16.7B
| $91.2M | 0.26% |
368,056
+252,423
| +218% | +$66.4M |
|
106
Louisiana-Pacific
LPX
$5.15B
| $91M | 0.26% |
989,462
-71,300
| -7% | -$7.44M |
|
107
Regal Rexnord
RRX
$11.5B
| $88.9M | 0.25% |
781,091
-66,750
| -8% | -$9.27M |
|
108
BBB Foods
TBBB
$5.11B
| $87.3M | 0.25% |
3,273,077
+1,154,939
| +55% | +$32.2M |
|
109
Eagle Materials
EXP
$6.47B
| $86.4M | 0.24% |
389,208
-23,980
| -6% | -$5.69M |
|
110
Tenable Holdings
TENB
$4.06B
| $85.2M | 0.24% |
2,434,850
-205,179
| -8% | -$8.03M |
|
111
MakeMyTrip
MMYT
$5.68B
| $84.4M | 0.24% |
860,816
-74,935
| -8% | -$7.73M |
|
112
TPG
TPG
$8.17B
| $84.2M | 0.24% |
1,775,513
-144,798
| -8% | -$8.44M |
|
113
FirstService
FSV
$6.24B
| $84M | 0.24% |
505,945
-231,606
| -31% | -$40.6M |
|
114
Credicorp
BAP
$29.8B
| $80M | 0.22% |
429,630
-49,237
| -10% | -$9.14M |
|
115
West Pharmaceutical
WST
$24.8B
| $79M | 0.22% |
352,838
-287,897
| -45% | -$79.3M |
|
116
Chubb
CB
$133B
| $78.4M | 0.22% |
259,685
+73,640
| +40% | +$20.5M |
|
117
Burlington
BURL
$22.4B
| $77.1M | 0.22% |
323,644
-26,466
| -8% | -$6.86M |
|
118
HDFC Bank
HDB
$118B
| $77M | 0.22% |
2,318,596
-2,659,706
| -53% | -$81.1M |
|
119
Shopify
SHOP
$193B
| $76.6M | 0.22% |
802,416
-1,348,335
| -63% | -$147M |
|
120
Americold
COLD
$4.14B
| $74.3M | 0.21% |
3,462,838
+1,579,797
| +84% | +$34.3M |
|
121
Glaukos
GKOS
$11B
| $73.4M | 0.21% |
745,290
-64,299
| -8% | -$8.58M |
|
122
Avantor
AVTR
$9.36B
| $71.9M | 0.2% |
4,433,042
-315,873
| -7% | -$5.98M |
|
123
Champion Homes
SKY
$5.08B
| $70.6M | 0.2% |
745,333
+7,707
| +1% | +$739K |
|
124
Tecnoglass Holdings Inc.
TGLS
$1.87B
| $70.2M | 0.2% |
980,936
-47,238
| -5% | -$3.51M |
|
125
Arch Capital
ACGL
$33.3B
| $69.6M | 0.2% |
724,149
+100,094
| +16% | +$9.24M |
|
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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.