MDYG — SPDR® S & P 400 Mid Cap Growth ETF
Data updated: 2026-09-11
MDYG — SPDR® S & P 400 Mid Cap Growth ETF. United States Mid Cap Growth Equity · $2.92B AUM. Holdings, fees, performance and SEC filings.
MDYG Fund Overview
MDYG — SPDR® S & P 400 Mid Cap Growth ETF is a US ETF managed by SPDR Series Trust, categorised as United States Mid Cap Growth Equity. ABC INVEST provides holdings, performance, costs, cashflows, risk data, prospectus documents and SEC filings, sourced from SEC filings.
- Type: US ETF
- Manager: SPDR Series Trust
- Category: United States Mid Cap Growth Equity
- Assets under management: $2.92B
- 1-year return: 29.8%
- Ticker: MDYG
- SEC CIK: 0001064642
- SEC series ID: S000006987
- Share class ID: C000019040
MDYG Holdings
Top 10 holdings of SPDR® S & P 400 Mid Cap Growth ETF by percentage of net assets, from the fund's latest SEC N-PORT filing.
| Holding | % of net assets |
|---|---|
| State Street Global Advisors | 3.52% |
| Twilio Inc | 1.66% |
| Carpenter Technology Corp | 1.62% |
| Curtiss-Wright Corp | 1.48% |
| nVent Electric PLC | 1.45% |
| ATI Inc | 1.42% |
| TechnipFMC PLC | 1.40% |
| Sterling Infrastructure Inc | 1.36% |
| MasTec Inc | 1.36% |
| Woodward Inc | 1.34% |
MDYG Portfolio Allocation
Asset-class allocation of SPDR® S & P 400 Mid Cap Growth ETF by percentage of net assets, from the latest SEC N-PORT filing.
| Asset class | Allocation |
|---|---|
| Equity | 99.9% |
| Cash & Equivalents | 3.5% |
MDYG Performance
Total returns for MDYG (as of 2026-09-01), from SEC filings.
| Period | Total return |
|---|---|
| YTD | 21.5% |
| 1 year | 29.8% |
| 3 years (annualised) | 17.1% |
| 5 years (annualised) | 8.7% |
MDYG Risk Information
Risk metrics for MDYG, derived from monthly returns in SEC filings.
- 1-year volatility (annualised): 11.9%
MDYG Costs and Fees
MDYG costs about $15 per $10,000 invested per year in fund expenses.
- Net expense ratio: 0.15%
- Gross expense ratio: 0.15%
- Portfolio turnover: 88%
- Brokerage commissions: 0.47 bps of average net assets (SEC N-CEN)
MDYG Cashflows
Over the 12 months to 2026-06, SPDR® S & P 400 Mid Cap Growth ETF had net inflows of $2.52M, from monthly SEC N-PORT filings.
| Month | Net flow |
|---|---|
| 2026-06 | $5.20M |
| 2026-05 | $10.84M |
| 2026-04 | $10.34M |
| 2026-03 | −$9.65M |
| 2026-02 | $5.36M |
| 2026-01 | −$53.91M |
MDYG Debt Constituents
No individual debt constituents are reported in SPDR® S & P 400 Mid Cap Growth ETF's latest SEC N-PORT filing.
MDYG Prospectus and SEC Filings
Official SPDR® S & P 400 Mid Cap Growth ETF filings on SEC EDGAR — prospectus, portfolio holdings and annual reports.
- Prospectus (485BPOS) — filed 2025-10-24
- Prospectus (485BPOS) — filed 2024-10-24
- Prospectus supplement (497) — filed 2024-11-01
- 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 2026-09-11
- Annual census (N-CEN) — filed 2025-09-12
Related Funds
Other United States Mid Cap Growth 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.