Mid-Cap Index Portfolio
Data updated: 2026-08-28
C000012160 — Mid-Cap Index Portfolio. United States Mid Cap Blend / Core Equity · $3.53B AUM. Holdings, fees, performance and SEC filings.
C000012160 Fund Overview
Mid-Cap Index Portfolio is a US mutual fund managed by Vanguard Variable Insurance Funds, categorised as United States Mid Cap Blend / Core Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US mutual fund
- Manager: Vanguard Variable Insurance Funds
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $3.53B
- 1-year return: 16.6%
- SEC CIK: 0000857490
- SEC series ID: S000004404
- Share class ID: C000012160
C000012160 Investment Objective and Strategy
Mid-Cap Index Portfolio describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Vanguard Variable Insurance Funds.
Investment objective
Vanguard Variable Insurance Funds Mid-Cap Index Portfolio (the Fund) seeks to track the performance of a benchmark index that measures the investment return of mid-capitalization stocks.
Principal investment strategy
The Fund employs an indexing investment approach designed to track the performance of the CRSP US Mid Cap Index (the Target Index), a broadly diversified index of stocks of mid-size U.S. companies, as determined by the index provider. Under normal circumstances, the Fund invests at least 80% of its net assets, plus the amount of any borrowings for investment purposes, in the stocks that make up the Target Index. The Fund attempts to replicate the Target Index by investing all, or substantially all, of its assets in the stocks that make up the Target Index, holding each stock in approximately the same proportion as its weighting in the Target Index.
C000012160 Holdings
Top 10 holdings of Mid-Cap Index Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Vertiv Holdings Co | 1.24% |
| Western Digital Corp | 1.06% |
| Seagate Technology Holdings PLC | 1.05% |
| Quanta Services Inc | 1.04% |
| Howmet Aerospace Inc | 1.04% |
| Cummins Inc | 0.95% |
| Datadog Inc | 0.83% |
| Bloom Energy Corp | 0.79% |
| Constellation Energy Corp | 0.78% |
| Robinhood Markets Inc | 0.77% |
C000012160 Portfolio Allocation
Asset-class allocation of Mid-Cap Index Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.7% |
| Cash & Equivalents | 0.3% |
C000012160 Performance
Total returns for C000012160 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 11.8% |
| 1 year | 16.6% |
| 3 years (annualised) | 15.2% |
| 5 years (annualised) | 7.8% |
C000012160 Risk Information
Risk metrics for C000012160, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 10.8%
C000012160 Costs and Fees
C000012160 costs about $17 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.17%
- Gross expense ratio: 0.17%
- Portfolio turnover: 22%
- Brokerage commissions: 0.28 bps of average net assets (SEC N-CEN)
C000012160 Cashflows
Over the 12 months to 2026-06, Mid-Cap Index Portfolio had net inflows of $133.63M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | −$11.96M |
| 2026-05 | −$7.40M |
| 2026-04 | −$16.32M |
| 2026-03 | $208.00M |
| 2026-02 | −$22.96M |
| 2026-01 | −$7.47M |
C000012160 Debt Constituents
No individual debt constituents are reported in Mid-Cap Index Portfolio's latest SEC N-PORT filing.
C000012160 Prospectus and SEC Filings
Official Mid-Cap Index Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-28
- Prospectus (485BPOS) — filed 2025-04-29
- Prospectus (485BPOS) — filed 2024-04-26
- Portfolio holdings (N-PORT) — filed 2026-08-28
- Portfolio holdings (N-PORT) — filed 2026-05-28
- Portfolio holdings (N-PORT) — filed 2026-02-26
- Annual census (N-CEN) — filed 2026-03-12
- Annual census (N-CEN) — filed 2025-03-13
Related Funds
Other United States Mid Cap Blend / Core 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.