VGT vs VO: 10% overlap
Vanguard Information Technology ETF and Vanguard Mid-Cap ETF share 9.7% 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 1.9. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
VGT and VO hold 39 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VGT | in VO | Δ |
|---|---|---|---|
| WDC | 0.9% | 1.1% | 0.2% |
| STX | 0.9% | 1.0% | 0.2% |
| FTNT | 0.4% | 0.5% | 0.0% |
| CASH | 0.4% | 0.5% | 0.1% |
| DDOG | 0.4% | 0.8% | 0.5% |
| SNOW | 0.4% | 0.4% | 0.0% |
| TER | 0.4% | 0.7% | 0.4% |
| NET | 0.3% | 0.8% | 0.4% |
| ALAB | 0.3% | 0.4% | 0.0% |
| MSI | 0.3% | 0.7% | 0.4% |
Where VGT and VO 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 | VGT | VO | Δ |
|---|---|---|---|
| Information Technology | 99.5% | 16.1% | +83.4pp |
| Industrials | 0.0% | 19.6% | −19.6pp |
| Financials | 0.0% | 14.0% | −14.0pp |
| Consumer Discretionary | 0.0% | 8.9% | −8.9pp |
| Utilities | 0.0% | 8.4% | −8.4pp |
| Health Care | 0.0% | 7.8% | −7.8pp |
| Energy | 0.0% | 7.3% | −7.3pp |
| Real Estate | 0.0% | 5.1% | −5.1pp |
Δ is VGT minus VO, 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
90.3% of VGT by weight, held in no part of VO.
83.4% of VO by weight, held in no part of VGT.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VGT | VO | |
|---|---|---|
| Top 10 holdings | 59.9% | 9.5% |
| Positions held | 322 | 283 |
| Cost per $10,000 held, per year | $9 | $3 |
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 VGT and VO overlap?
VGT and VO overlap 9.7% by portfolio weight — largely distinct portfolios. They share 39 holdings. The figure comes from current issuer holdings files (VGT as of 2026-06-30, VO as of 2026-06-30).
How is the overlap between VGT and VO calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VGT holds a stock at 6% and VO 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 VGT and VO?
That depends on your goals — we state facts, not advice. At 9.7% overlap, each fund still contributes meaningfully distinct exposure.
What does VGT own that VO doesn't?
VGT holds 322 positions and VO holds 283; 283 of VGT's positions don't appear in VO at all, and they are 90.3% of VGT by weight.
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Related comparisons
Sources: issuer holdings files, VGT as of 2026-06-30, VO as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.