VGT vs VOOG: 51% overlap
Vanguard Information Technology ETF and Vanguard S&P 500 Growth ETF share 51.2% 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 1.5. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
VGT and VOOG hold 41 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VGT | in VOOG | Δ |
|---|---|---|---|
| NVDA | 16.1% | 13.7% | 2.5% |
| MSFT | 8.3% | 7.8% | 0.5% |
| AAPL | 14.3% | 6.0% | 8.3% |
| AVGO | 3.8% | 5.0% | 1.2% |
| MU | 5.0% | 3.7% | 1.4% |
| AMD | 3.6% | 2.7% | 1.0% |
| AMAT | 2.3% | 1.6% | 0.6% |
| LRCX | 2.1% | 1.5% | 0.6% |
| KLAC | 1.6% | 1.1% | 0.5% |
| SNDK | 1.3% | 0.9% | 0.4% |
Where VGT 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 | VGT | VOOG | Δ |
|---|---|---|---|
| Information Technology | 99.5% | 52.2% | +47.2pp |
| Communication Services | 0.0% | 15.2% | −15.2pp |
| Financials | 0.0% | 8.5% | −8.5pp |
| Consumer Discretionary | 0.0% | 8.5% | −8.4pp |
| Industrials | 0.0% | 6.9% | −6.9pp |
| Health Care | 0.0% | 6.2% | −6.2pp |
| Consumer Staples | 0.1% | 1.1% | −1.0pp |
| Real Estate | 0.0% | 0.6% | −0.6pp |
Δ is VGT 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
24.4% of VGT by weight, held in no part of VOOG.
47.6% of VOOG 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 | VOOG | |
|---|---|---|
| Top 10 holdings | 59.9% | 56.4% |
| Positions held | 322 | 148 |
| Cost per $10,000 held, per year | $9 | $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 VGT and VOOG overlap?
VGT and VOOG overlap 51.2% by portfolio weight — substantial duplication if you hold both. They share 41 holdings. The figure comes from current issuer holdings files (VGT as of 2026-06-30, VOOG as of 2026-06-30).
How is the overlap between VGT and VOOG 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 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 VGT and VOOG?
That depends on your goals — we state facts, not advice. At 51.2% overlap, each fund still contributes meaningfully distinct exposure.
What does VGT own that VOOG doesn't?
VGT holds 322 positions and VOOG holds 148; 281 of VGT's positions don't appear in VOOG at all, and they are 24.4% of VGT by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, VGT as of 2026-06-30, VOOG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.