WBCIX — William Blair Small-Mid Cap Core Fund
Data updated: 2026-08-14
WBCIX — William Blair Small-Mid Cap Core Fund. United States Mid Cap Value Equity · $268.90M AUM. Holdings, fees, performance and SEC filings.
WBCIX Fund Overview
WBCIX — William Blair Small-Mid Cap Core Fund is a US mutual fund managed by William Blair Funds, categorised as United States Mid Cap Value 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: United States Mid Cap Value Equity
- Assets under management: $268.90M
- 1-year return: 20.8%
- Ticker: WBCIX
- SEC CIK: 0000822632
- SEC series ID: S000066499
- Share class ID: C000214491
WBCIX Holdings
Top 10 holdings of William Blair Small-Mid Cap Core Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Fixed Income Clearing Corp. | 3.07% |
| BorgWarner Inc | 2.05% |
| F5 Inc | 1.76% |
| Everest Group Ltd | 1.69% |
| Everpure Inc | 1.68% |
| Diebold Nixdorf Inc | 1.67% |
| Carpenter Technology Corp | 1.66% |
| Knight-Swift Transportation Holdings Inc | 1.66% |
| IDACORP Inc | 1.65% |
| Akamai Technologies Inc | 1.63% |
WBCIX Portfolio Allocation
Asset-class allocation of William Blair Small-Mid Cap Core Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 97.0% |
| Cash & Equivalents | 3.1% |
WBCIX Performance
Total returns for WBCIX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 15.6% |
| 1 year | 20.8% |
| 3 years (annualised) | 11.2% |
| 5 years (annualised) | 5.7% |
WBCIX Risk Information
Risk metrics for WBCIX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.9%
WBCIX Costs and Fees
WBCIX costs about $95 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.95%
- Gross expense ratio: 1.19%
- Portfolio turnover: 81%
- Brokerage commissions: 5.47 bps of average net assets (SEC N-CEN)
WBCIX Cashflows
Over the 12 months to 2026-06, William Blair Small-Mid Cap Core Fund had net inflows of $96.84M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$3.04M |
| 2026-05 | −$4.45M |
| 2026-04 | $10.23M |
| 2026-03 | $107.05M |
| 2026-02 | −$4.47M |
| 2026-01 | −$355.61K |
WBCIX Debt Constituents
No individual debt constituents are reported in William Blair Small-Mid Cap Core Fund's latest SEC N-PORT filing.
WBCIX Prospectus and SEC Filings
Official William Blair Small-Mid Cap Core 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 United States Mid Cap Value 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.