MDY vs VOO: how much do they overlap?
SPDR S&P MIDCAP 400 ETF Trust (MDY) · Vanguard S&P 500 ETF (VOO)
overlap by weight · 0 shared holdings
MDY: 400 holdings (as of 09-Jul-2026) · VOO: 504 holdings (as of 2026-03-31)
Note: the two funds' latest official filings have different dates, which can understate overlap slightly for funds tracking similar indexes.
Low overlap
What this means
MDY and VOO hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Overlap by weight sums the smaller of the two funds' weights for every stock they both hold — it answers "how much of my money is in the same stocks either way?" See methodology.
Top shared holdings
| Company | Ticker | in MDY | in VOO |
|---|
FAQ
How much do MDY and VOO overlap?
MDY and VOO have a 0% overlap by weight, sharing 0 holdings (out of 400 in MDY and 504 in VOO), based on official issuer holdings as of 09-Jul-2026.
What does 0% overlap mean?
MDY and VOO hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Which stocks do MDY and VOO both hold?
The largest shared positions are . The full list of top shared holdings with weights in each fund is shown on this page.