VB vs VOOG: 1% overlap
Vanguard Small-Cap ETF and Vanguard S&P 500 Growth ETF share 1.1% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
You would hold two tickers and get the diversification of 2.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
VB and VOOG hold 16 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VB | in VOOG | Δ |
|---|---|---|---|
| CASH | 1.7% | 0.2% | 1.5% |
| FLEX | 0.4% | 0.2% | 0.2% |
| EME | 0.4% | 0.1% | 0.3% |
| TPR | 0.4% | 0.1% | 0.3% |
| CASY | 0.4% | 0.1% | 0.3% |
| FSLR | 0.1% | 0.1% | 0.1% |
| JBL | 0.5% | 0.1% | 0.4% |
| NRG | 0.4% | 0.1% | 0.3% |
| INCY | 0.2% | 0.1% | 0.2% |
| RL | 0.2% | 0.0% | 0.1% |
Where VB and VOOG differ
Sector weights as a share of each fund, ordered by the size of the gap rather than the size of the sector — two funds that overlap heavily still usually diverge somewhere.
| Sector | VB | VOOG | Δ |
|---|---|---|---|
| Information Technology | 16.1% | 52.2% | −36.1pp |
| Industrials | 21.0% | 6.9% | +14.1pp |
| Communication Services | 3.0% | 15.2% | −12.2pp |
| Real Estate | 7.1% | 0.6% | +6.5pp |
| Health Care | 11.9% | 6.2% | +5.8pp |
| Materials | 5.3% | 0.3% | +5.0pp |
| Financials | 12.7% | 8.5% | +4.2pp |
| Energy | 3.7% | 0.0% | +3.7pp |
Δ is VB minus VOOG, in percentage points. Sector data is not published by every issuer, so “Unclassified” is a real category rather than a gap in the table.
What each fund holds alone
94.7% of VB by weight, held in no part of VOOG.
98.9% of VOOG by weight, held in no part of VB.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VB | VOOG | |
|---|---|---|
| Top 10 holdings | 5.6% | 56.4% |
| Positions held | 1,308 | 148 |
| Cost per $10,000 held, per year | $3 | $7 |
Cost is the expense ratio applied to $10,000; it excludes any brokerage commission, bid-ask spread or tax consequence. Figures are facts about the funds, not a suggestion about which to hold.
Frequently asked
How much do VB and VOOG overlap?
VB and VOOG overlap 1.1% by portfolio weight — largely distinct portfolios. They share 16 holdings. The figure comes from current issuer holdings files (VB as of 2026-06-30, VOOG as of 2026-06-30).
How is the overlap between VB and VOOG calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VB holds a stock at 6% and VOOG holds the same stock at 4%, 4% counts as shared. The result is bounded between 0% and 100%, and it is computed after looking through any fund-of-funds to the underlying holdings.
Is it redundant to hold both VB and VOOG?
That depends on your goals — we state facts, not advice. At 1.1% overlap, each fund still contributes meaningfully distinct exposure.
What does VB own that VOOG doesn't?
VB holds 1,308 positions and VOOG holds 148; 1,292 of VB's positions don't appear in VOOG at all, and they are 94.7% of VB by weight.
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Related comparisons
Sources: issuer holdings files, VB as of 2026-06-30, VOOG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.