MIDKX — S&P MidCap Index Fund
Data updated: 2026-07-30
MIDKX — S&P MidCap Index Fund. United States Mid Cap Blend / Core Equity · $115.69M AUM · 1.13% expense ratio. Holdings, fees, performance and SEC filings.
MIDKX Fund Overview
MIDKX — S&P MidCap Index Fund is a US mutual fund managed by Shelton 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: Shelton Funds
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $115.69M
- 1-year return: 24.3%
- Ticker: MIDKX
- SEC CIK: 0000778206
- SEC series ID: S000016023
- Share class ID: C000044032
MIDKX Holdings
Top 10 holdings of S&P MidCap Index Fund by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Flex Ltd. | 1.57% |
| United States Of America - Bureau Of The Public Debt | 0.95% |
| Twilio, Inc. | 0.81% |
| Technipfmc PLC | 0.77% |
| Curtiss-Wright Corp. | 0.77% |
| Nvent Electric PLC | 0.75% |
| Sterling Infrastructure, Inc. | 0.74% |
| Illumina, Inc. | 0.71% |
| Xpo, Inc. | 0.70% |
| Everpure, Inc. | 0.69% |
MIDKX Portfolio Allocation
Asset-class allocation of S&P MidCap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.0% |
| Fixed Income | 0.9% |
| Derivatives | 0.6% |
MIDKX Performance
Total returns for MIDKX (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 12.6% |
| 1 year | 24.3% |
| 3 years (annualised) | 16.0% |
| 5 years (annualised) | 6.9% |
MIDKX Risk Information
Risk metrics for MIDKX, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.1%
MIDKX Costs and Fees
MIDKX costs about $113 per $10,000 invested per year in fund expenses.
- Net expense ratio: 1.13%
- Gross expense ratio: 1.13%
- Portfolio turnover: 12%
- Brokerage commissions: 1.75 bps of average net assets (SEC N-CEN)
MIDKX Cashflows
Over the 12 months to 2026-05, S&P MidCap Index Fund had net outflows of $5.82M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-05 | −$916.06K |
| 2026-04 | −$1.22M |
| 2026-03 | −$473.37K |
| 2026-02 | −$1.10M |
| 2026-01 | −$138.68K |
| 2025-12 | −$520.29K |
MIDKX Debt Constituents
Largest debt holdings of S&P MidCap Index Fund by percentage of net assets, from the latest SEC N-PORT filing.
| Debt holding | % of net assets |
|---|---|
| United States Of America - Bureau Of The Public Debt | 0.95% |
MIDKX Prospectus and SEC Filings
Official S&P MidCap Index Fund filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-12-29
- Prospectus supplement (497) — filed 2025-12-31
- Prospectus supplement (497) — filed 2025-01-03
- Portfolio holdings (N-PORT) — filed 2026-07-30
- Portfolio holdings (N-PORT) — filed 2026-04-29
- Portfolio holdings (N-PORT) — filed 2026-01-29
- Annual census (N-CEN) — filed 2025-11-14
- Annual census (N-CEN) — filed 2024-11-14
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.