MDY vs VUG: Holdings Overlap
MDYState Street® SPDR® S&P MIDCAP 400® ETF Trust
State Street (SPDR) · 399 holdings · $27.1B · as of 2026-08-06
Vanguard · 153 holdings · $229.6B · as of 2026-03-31
Holdings snapshots are 128 days apart (MDY: 2026-08-06, VUG: 2026-03-31). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are MDY and VUG?
State Street® SPDR® S&P MIDCAP 400® ETF Trust (MDY, by State Street (SPDR)) holds 399 positions; Vanguard Growth Index Fund (VUG, by Vanguard) holds 153. They have 2 holdings in common, and by portfolio weight the two funds are 0.1% identical. In practical terms the pair is essentially distinct, holding almost none of the same securities.
- Overlap by Weight
- 0.1%Sum of the smaller weight of each shared holding
- Shared Holdings
- 2MDY holds 399 · VUG holds 153
- Weight in Shared Holdings
- MDY 1%·VUG 0%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in MDY
397 of 399 positions (103.8% of the fund) are not held by VUG. Showing the top 30 by weight.
Sector Breakdown
| Sector | MDY | VUG |
|---|---|---|
| Information Technology | 15.6% | 51.9% |
| Industrials | 25.9% | 5.2% |
| Communication Services | 2.2% | 16.5% |
| Financials | 16.0% | 4.7% |
| Consumer Discretionary | 11.6% | 12.5% |
| Other Sectors | 33.7% | 9.2% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| MDY | +3.1% | +18.1% | +25.6% | +14.2% | +8.8% | +10.9% | 0.99% |
| VUG | +4.1% | +10.2% | +18.2% | +24.1% | +13.0% | +17.8% | 0.38% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in MDY vs VUG →
Shared Holdings(2)
Frequently Asked Questions
How much do MDY and VUG overlap?
MDY and VUG overlap by 0.1% of portfolio weight. They share 2 holdings (MDY holds 399 positions and VUG holds 153), based on each fund's latest SEC-reported holdings.
Is it redundant to own both MDY and VUG?
The two portfolios are 0.1% identical by weight. Owning both is genuine diversification: the funds hold almost none of the same securities.
What are the biggest shared holdings of MDY and VUG?
The largest positions held by both funds are BURL and PINS. Together the top 2 shared positions account for 95% of the total overlap.
What does MDY own that VUG doesn't?
397 positions (103.8% of MDY) are unique to MDY, led by ATI, TWLO and ILMN. In the other direction, 151 positions (99.8% of VUG) are unique to VUG.