SPY vs VB: how much do they overlap?
SPDR S&P 500 ETF Trust (SPY) · Vanguard Small-Cap ETF (VB)
overlap by weight · 118 shared holdings
SPY: 504 holdings (as of 09-Jul-2026) · VB: 1312 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
SPY and VB 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 SPY | in VB |
|---|---|---|---|
| Ciena Corp | CIEN | 0.1% | 0.38% |
| Coherent Corp | COHR | 0.1% | 0.31% |
| Comfort Systems Usa Inc | FIX | 0.1% | 0.34% |
| Lumentum Holdings Inc | LITE | 0.09% | 0.35% |
| Flex Ltd | FLEX | 0.08% | 0.34% |
| Jabil Inc | JBL | 0.05% | 0.37% |
| Emcor Group Inc | EME | 0.05% | 0.46% |
| Centene Corp | CNC | 0.05% | 0.11% |
| Eqt Corp | EQT | 0.05% | 0.28% |
| Casey S General Stores Inc | CASY | 0.05% | 0.38% |
FAQ
How much do SPY and VB overlap?
SPY and VB have a 3.1% overlap by weight, sharing 118 holdings (out of 504 in SPY and 1312 in VB), based on official issuer holdings as of 09-Jul-2026.
What does 3.1% overlap mean?
SPY and VB hold mostly different stocks. Combining them genuinely spreads your exposure across different parts of the market.
Which stocks do SPY and VB both hold?
The largest shared positions are Ciena Corp, Coherent Corp, Comfort Systems Usa Inc, Lumentum Holdings Inc, Flex Ltd. The full list of top shared holdings with weights in each fund is shown on this page.