WBIIX — William Blair Institutional International Growth Fund
Data updated: 2026-08-14
WBIIX — William Blair Institutional International Growth Fund. Holdings, fees, performance and SEC filings.
WBIIX Fund Overview
WBIIX — William Blair Institutional International Growth Fund is a US mutual fund managed by William Blair Funds, categorised as Developed ex-US Large Cap Growth Information Technology Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: William Blair Funds
- Category: Developed ex-US Large Cap Growth Information Technology Equity
- Assets under management: $779.77M
- 1-year return: 21.7%
- Ticker: WBIIX
- SEC CIK: 0000822632
- SEC series ID: S000008605
- Share class ID: C000023546
WBIIX Holdings
Top 10 holdings of William Blair Institutional International Growth Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Taiwan Semiconductor Manufacturing Co Ltd | 5.26% |
| ASML Holding NV | 3.27% |
| SK hynix Inc | 3.00% |
| Samsung Electronics Co Ltd | 2.97% |
| Fixed Income Clearing Corp. | 1.62% |
| AstraZeneca PLC | 1.57% |
| Sumitomo Mitsui Financial Group Inc | 1.33% |
| Safran SA | 1.29% |
| Roche Holding AG | 1.26% |
| Tokio Marine Holdings Inc | 1.16% |
WBIIX Portfolio Allocation
Asset-class allocation of William Blair Institutional International Growth Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 97.9% |
| Cash & Equivalents | 1.6% |
WBIIX Performance
Total returns for WBIIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 16.7% |
| 1 year | 21.7% |
| 3 years (annualised) | 13.4% |
| 5 years (annualised) | 3.3% |
WBIIX Risk Information
Risk metrics for WBIIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 17.6%
WBIIX Costs and Fees
WBIIX costs about $85 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.85%
- Gross expense ratio: 0.91%
- Portfolio turnover: 79%
- Brokerage commissions: 10.00 bps of average net assets (SEC N-CEN)
WBIIX Cashflows
Over the 12 months to 2026-06, William Blair Institutional International Growth Fund had net outflows of $253.58M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $2.74M |
| 2026-05 | −$37.91M |
| 2026-04 | −$34.12M |
| 2026-03 | −$1.14M |
| 2026-02 | −$3.64M |
| 2026-01 | −$102.42M |
WBIIX Debt Constituents
No individual debt constituents are reported in William Blair Institutional International Growth Fund's latest SEC N-PORT filing.
WBIIX Prospectus and SEC Filings
Official William Blair Institutional International Growth Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-29
- Prospectus (485BPOS) — filed 2025-04-30
- Prospectus (485BPOS) — filed 2024-04-29
- Portfolio holdings (N-PORT) — filed 2026-08-14
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-18
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-12
Related Funds
Other Developed ex-US Large Cap Growth Information Technology Equity funds tracked on ABC INVEST:
Data Sources
ABC INVEST compiles this page from public filings made to the U.S. Securities and Exchange Commission (SEC) through EDGAR: portfolio holdings and monthly cashflows from Form N-PORT, expenses and returns from fund prospectuses (Form 485BPOS) and the SEC DERA Risk/Return Summary data sets, annual data from Form N-CEN, and shareholder reports from Form N-CSR.