SA Mid Cap Index Portfolio
Data updated: 2026-09-28
C000177073 — SA Mid Cap Index Portfolio. United States Mid Cap Blend / Core Equity · $516.23M AUM. Holdings, fees, performance and SEC filings.
C000177073 Fund Overview
SA Mid Cap Index Portfolio is a US mutual fund managed by Sunamerica Series Trust, 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: Sunamerica Series Trust
- Category: United States Mid Cap Blend / Core Equity
- Assets under management: $516.23M
- 1-year return: 20.5%
- SEC CIK: 0000892538
- SEC series ID: S000056258
- Share class ID: C000177073
C000177073 Investment Objective and Strategy
SA Mid Cap Index Portfolio describes its objective and strategy as follows, from its latest prospectus filed with the SEC by Sunamerica Series Trust.
Investment objective
The Portfolios investment goal is investment results that correspond with the performance of the S&P MidCap 400 Index.
Principal investment strategy
The Portfolio seeks to provide investment results that correspond with the performance of the S&P MidCap 400 Index (the Index). The Index is a capitalization-weighted index designed to measure the performance of mid-sized companies in the United States. The subadviser primarily seeks to achieve the Portfolios objective by investing in all or substantially all of the stocks included in the Index, a strategy known as replication. The subadviser may, however, utilize an optimization strategy in circumstances in which replication is difficult or impossible, such as if the Portfolio has low asset levels and cannot replicate, to reduce trading costs or to gain exposure to securities that the Portfolio cannot access directly. The goal of optimization is to select stocks which ensure that characteristics such as industry weightings, average market capitalizations and fundamental characteristics ( e.g.
, price-to-book, price-to-earnings, debt-to-asset ratios and dividend yields) closely approximate those of the Index. Stocks not in the Index may be held before or after changes in the composition of the Index or if they have characteristics similar to stocks in the Index. Under normal circumstances, the Portfolio invests substantially all, but at least 80%, of its net assets in securities included in the Index or in securities that the subadviser determines have economic characteristics that are comparable to the economic characteristics of securities included in the Index, including derivatives, such as contracts for differences. The Portfolio will not concentrate, except to approximately the same extent as the Index may concentrate, in the securities of any industry. It is not anticipated, however, that the Portfolio will, under normal circumstances, be concentrated in the securities of any industry.
Because the Portfolio will generally not hold all of the stocks included in the Index, and because the Portfolio has expenses and the Index does not, the Portfolio will not duplicate the Indexs performance precisely. However, the subadviser believes there should be a close correlation between the Portfolios performance and that of the Index in both rising and falling markets.
C000177073 Holdings
Top 10 holdings of SA Mid Cap Index Portfolio by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Illumina Inc | 0.87% |
| Twilio Inc | 0.84% |
| TechnipFMC PLC | 0.80% |
| Curtiss-Wright Corp | 0.75% |
| Carpenter Technology Corp | 0.72% |
| ATI Inc | 0.71% |
| nVent Electric PLC | 0.70% |
| Everpure Inc | 0.68% |
| Okta Inc | 0.67% |
| XPO Inc | 0.66% |
C000177073 Portfolio Allocation
Asset-class allocation of SA Mid Cap Index Portfolio by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 100.0% |
C000177073 Performance
Total returns for C000177073 (as of 2026-10-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 14.3% |
| 1 year | 20.5% |
| 3 years (annualised) | 12.5% |
| 5 years (annualised) | 8.0% |
C000177073 Risk Information
Risk metrics for C000177073, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 12.0%
C000177073 Costs and Fees
C000177073 costs about $37 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.37%
- Gross expense ratio: 0.37%
- Portfolio turnover: 24%
- Brokerage commissions: 0.60 bps of average net assets (SEC N-CEN)
C000177073 Cashflows
Over the 12 months to 2026-07, SA Mid Cap Index Portfolio had net outflows of $38.33M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-07 | −$8.29M |
| 2026-06 | −$7.98M |
| 2026-05 | −$5.13M |
| 2026-04 | −$8.79M |
| 2026-03 | −$12.91M |
| 2026-02 | −$5.39M |
C000177073 Debt Constituents
No individual debt constituents are reported in SA Mid Cap Index Portfolio's latest SEC N-PORT filing.
C000177073 Prospectus and SEC Filings
Official SA Mid Cap Index Portfolio filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2026-04-27
- Prospectus (485BPOS) — filed 2025-04-28
- Prospectus (485BPOS) — filed 2024-04-26
- Portfolio holdings (N-PORT) — filed 2026-09-28
- Portfolio holdings (N-PORT) — filed 2026-06-29
- Portfolio holdings (N-PORT) — filed 2026-03-27
- Annual census (N-CEN) — filed 2026-04-16
- Annual census (N-CEN) — filed 2025-04-11
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.