MDY — SPDR S&P MidCap 400 ETF Trust
Data updated: 2026-08-27
MDY — SPDR S&P MidCap 400 ETF Trust. United States Mid Cap Equity · $28.05B AUM · 0.24% expense ratio. Holdings, fees, performance and SEC filings.
MDY Fund Overview
MDY — SPDR S&P MidCap 400 ETF Trust is a US ETF managed by SPDR S&P Midcap 400 ETF Trust, categorised as United States Mid Cap Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US ETF
- Manager: SPDR S&P Midcap 400 ETF Trust
- Category: United States Mid Cap Equity
- Assets under management: $28.05B
- 1-year return: 18.9%
- Ticker: MDY
- SEC CIK: 0000936958
- SEC series ID: RS0000936958
- Share class ID: RC0000936958
MDY Holdings
Top 10 holdings of SPDR S&P MidCap 400 ETF Trust by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| Twilio, Inc. | 0.86% |
| Carpenter Technology Corp. | 0.84% |
| Mks, Inc. | 0.82% |
| Curtiss-Wright Corp. | 0.77% |
| Nvent Electric PLC | 0.75% |
| Entegris, Inc. | 0.75% |
| Ati, Inc. | 0.74% |
| Illumina, Inc. | 0.73% |
| Technipfmc PLC | 0.72% |
| Sterling Infrastructure, Inc. | 0.71% |
MDY Portfolio Allocation
Asset-class allocation of SPDR S&P MidCap 400 ETF Trust by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.4% |
MDY Performance
Total returns for MDY (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 4.2% |
| 1 year | 18.9% |
| 3 years (annualised) | 12.3% |
| 5 years (annualised) | 6.9% |
MDY Risk Information
Risk metrics for MDY, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.0%
MDY Costs and Fees
MDY costs about $24 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.24%
- Gross expense ratio: 0.24%
MDY Cashflows
Over the 12 months to 2026-06, SPDR S&P MidCap 400 ETF Trust had net outflows of $262.93M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $715.01M |
| 2026-05 | −$197.19M |
| 2026-04 | −$57.46M |
| 2026-03 | $159.59M |
| 2026-02 | $129.35M |
| 2026-01 | −$793.06M |
MDY Debt Constituents
No individual debt constituents are reported in SPDR S&P MidCap 400 ETF Trust's latest SEC N-PORT filing.
MDY Prospectus and SEC Filings
Official SPDR S&P MidCap 400 ETF Trust filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
Related Funds
Other United States Mid Cap 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.