Returns Chart

Key Stats

Net Expense Ratio Total Assets Under Management Weighted Average Dividend Yield Turnover Ratio (Generic)
1.05% 128.91M 1.64% 49.00%
1 Year Fund Level Flows 1 Year Total Returns (Daily) Annualized Total Returns Since Inception (Daily) Max Drawdown (Since Inception)
-52.07M 8.79% Upgrade Upgrade

Basic Info

Investment Strategy
The Fund seeks long-term capital appreciation. The Fund primarily invests in a diversified portfolio of common stocks of small cap companies located in countries included in the Morgan Stanley Capital International World Small Cap ex-US Index.
General
Security Type Mutual Fund
Broad Asset Class International Equity
Broad Category Equity
Global Peer Group Equity Global ex US Sm&Mid Cap
Peer Group International Small/Mid-Cap Growth
Global Macro Equity Global
US Macro Developed International Markets Funds
YCharts Categorization --
YCharts Benchmark --
Prospectus Objective International Small-Cap Funds
Fund Owner Firm Name William Blair
Broad Asset Class Benchmark Index
^MSACXUSNTR 100.0%

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Net Fund Flows Versus Peer Group

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1M
3M
6M
YTD
1Y
3Y
5Y
10Y
 
80.00B
60.00B
40.00B
20.00B
0
-20.00B
1 Month
% Rank: 39
-107.29M Peer Group Low
39.66M Peer Group High
1 Year
% Rank: 55
-52.07M
-1.882B Peer Group Low
693.58M Peer Group High
3 Months
% Rank: 62
-910.92M Peer Group Low
643.24M Peer Group High
3 Years
% Rank: 54
-3.191B Peer Group Low
339.96M Peer Group High
6 Months
% Rank: 76
-1.083B Peer Group Low
991.80M Peer Group High
5 Years
% Rank: 37
-5.094B Peer Group Low
363.59M Peer Group High
YTD
% Rank: 56
-1.836B Peer Group Low
754.74M Peer Group High
10 Years
% Rank: 74
-7.695B Peer Group Low
1.607B Peer Group High
Date Unavailable

Performance Versus Peer Group

 
20%
15%
10%
5%
0
Name
1M
3M
YTD
1Y
3Y
5Y
10Y
15Y
Total Return (NAV)
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
Peer Group Rtn. (NAV)
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
12.00%
% Rank in Peer Group (NAV)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
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Annual Total Returns Versus Peers

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Name
2018
2019
2020
2021
2022
2023
2024
YTD
-24.19%
34.32%
29.23%
11.27%
-34.94%
14.76%
0.86%
12.71%
-14.20%
21.51%
10.65%
7.82%
-16.00%
15.62%
5.53%
29.89%
-6.67%
27.66%
24.46%
5.82%
-34.31%
22.44%
4.23%
12.39%
-14.58%
26.14%
14.08%
13.96%
-26.63%
13.08%
-1.38%
12.68%
--
--
--
--
-20.14%
13.62%
10.21%
12.69%
-23.09%
28.27%
30.46%
4.94%
-30.59%
8.02%
0.91%
27.07%
As of December 05, 2025.

Fundamentals

General
Distribution Yield --
Dividend Yield TTM (12-3-25) 1.63%
30-Day SEC Yield --
7-Day SEC Yield --
Number of Holdings 135
Stock
Weighted Average PE Ratio 31.66
Weighted Average Price to Sales Ratio 6.596
Weighted Average Price to Book Ratio 8.255
Weighted Median ROE 20.79%
Weighted Median ROA 9.84%
ROI (TTM) 16.10%
Return on Investment (TTM) 16.10%
Earning Yield 0.0442
LT Debt / Shareholders Equity 0.6809
Number of Equity Holdings 129
As of September 30, 2025

Growth Metrics

EPS Growth (1Y) 22.38%
EPS Growth (3Y) 25.30%
EPS Growth (5Y) 22.67%
Sales Growth (1Y) 18.62%
Sales Growth (3Y) 21.06%
Sales Growth (5Y) 15.82%
Sales per Share Growth (1Y) 17.36%
Sales per Share Growth (3Y) 19.22%
Operating Cash Flow - Growth Rate (3Y) 33.38%
As of September 30, 2025

Asset Allocation

As of September 30, 2025.
Type % Net
Cash 1.44%
Stock 98.44%
Bond 0.00%
Convertible 0.00%
Preferred 0.00%
Other 0.11%
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Top 10 Holdings

Name % Weight Price % Change
Rakuten Bank Ltd. 1.86% 41.91 0.00%
OBIC Business Consultants Co., Ltd. 1.60% 60.90 0.00%
Kardex Holding AG 1.57% 348.30 4.49%
flatexDEGIRO AG 1.54% 32.50 0.00%
Japan Elevator Service Holdings Co., Ltd. 1.48% 12.32 0.00%
JTC Plc 1.44% 16.82 0.12%
Fixed Income Clearing Corp Repo
1.41% -- --
Dassault Aviation SA 1.40% 308.37 -1.79%
Azimut Holding SpA 1.37% 42.03 0.00%
CTS Eventim AG & Co. KGaA 1.36% 94.15 0.00%

Fees & Availability

Fees
Actual 12B-1 Fee --
Actual Management Fee 0.88%
Administration Fee --
Maximum Front Load --
Maximum Deferred Load --
Maximum Redemption Fee --
General Availability
Available for Insurance Product No
Available for RRSP No
Purchase Details
Open to New Investors Yes
Minimum Initial Investment 1.00M None
Minimum Subsequent Investment 0.00 None

Basic Info

Investment Strategy
The Fund seeks long-term capital appreciation. The Fund primarily invests in a diversified portfolio of common stocks of small cap companies located in countries included in the Morgan Stanley Capital International World Small Cap ex-US Index.
General
Security Type Mutual Fund
Broad Asset Class International Equity
Broad Category Equity
Global Peer Group Equity Global ex US Sm&Mid Cap
Peer Group International Small/Mid-Cap Growth
Global Macro Equity Global
US Macro Developed International Markets Funds
YCharts Categorization --
YCharts Benchmark --
Prospectus Objective International Small-Cap Funds
Fund Owner Firm Name William Blair
Broad Asset Class Benchmark Index
^MSACXUSNTR 100.0%

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Fundamentals

General
Distribution Yield --
Dividend Yield TTM (12-3-25) 1.63%
30-Day SEC Yield --
7-Day SEC Yield --
Number of Holdings 135
Stock
Weighted Average PE Ratio 31.66
Weighted Average Price to Sales Ratio 6.596
Weighted Average Price to Book Ratio 8.255
Weighted Median ROE 20.79%
Weighted Median ROA 9.84%
ROI (TTM) 16.10%
Return on Investment (TTM) 16.10%
Earning Yield 0.0442
LT Debt / Shareholders Equity 0.6809
Number of Equity Holdings 129
As of September 30, 2025

Growth Metrics

EPS Growth (1Y) 22.38%
EPS Growth (3Y) 25.30%
EPS Growth (5Y) 22.67%
Sales Growth (1Y) 18.62%
Sales Growth (3Y) 21.06%
Sales Growth (5Y) 15.82%
Sales per Share Growth (1Y) 17.36%
Sales per Share Growth (3Y) 19.22%
Operating Cash Flow - Growth Rate (3Y) 33.38%
As of September 30, 2025

Fund Details

Key Dates
Inception Date 11/1/2005
Last Annual Report Date 12/31/2024
Last Prospectus Date 5/1/2025
Share Classes
WISIX Inst
WISNX N
Attributes
Index Fund --
Inverse Fund No
Leveraged Fund --
Fund of Funds No
Currency Hedged Fund --
Synthetic Replication Fund No

Top Portfolio Holders

Name % Weight
Portfolio A 5.00%
Portfolio B 3.50%
Portfolio C 2.25%
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Excel Add-In Codes

Name: =YCI("M:WIISX", "name")
Broad Asset Class: =YCI("M:WIISX", "broad_asset_class")
Broad Category: =YCI("M:WIISX", "broad_category_group")
Prospectus Objective: =YCI("M:WIISX", "prospectus_objective")
To find the codes for any of our securities and financial metrics, see our Complete Excel Reference.
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