VOOG vs XLK: 52% overlap
Vanguard S&P 500 Growth ETF and Technology Select Sector SPDR Fund share 52.3% 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
VOOG and XLK hold 41 of the same securities. The ten contributing most to the overlap figure:
| Holding | in VOOG | in XLK | Δ |
|---|---|---|---|
| NVDA | 13.7% | 14.1% | 0.4% |
| MSFT | 7.8% | 7.9% | 0.1% |
| AAPL | 6.0% | 13.2% | 7.2% |
| AVGO | 5.0% | 5.2% | 0.1% |
| MU | 3.7% | 4.3% | 0.6% |
| AMD | 2.7% | 4.7% | 2.0% |
| AMAT | 1.6% | 3.0% | 1.4% |
| LRCX | 1.5% | 2.7% | 1.2% |
| KLAC | 1.1% | 1.9% | 0.8% |
| SNDK | 0.9% | 1.6% | 0.7% |
Where VOOG and XLK 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 | VOOG | XLK | Δ |
|---|---|---|---|
| Information Technology | 52.2% | 99.9% | −47.7pp |
| Communication Services | 15.2% | 0.0% | +15.2pp |
| Financials | 8.5% | 0.0% | +8.5pp |
| Consumer Discretionary | 8.5% | 0.0% | +8.5pp |
| Industrials | 6.9% | 0.0% | +6.9pp |
| Health Care | 6.2% | 0.0% | +6.2pp |
| Consumer Staples | 1.1% | 0.0% | +1.1pp |
| Real Estate | 0.6% | 0.0% | +0.6pp |
Δ is VOOG minus XLK, 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
47.6% of VOOG by weight, held in no part of XLK.
16.8% of XLK by weight, held in no part of VOOG.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| VOOG | XLK | |
|---|---|---|
| Top 10 holdings | 56.4% | 61.3% |
| Positions held | 148 | 76 |
| Cost per $10,000 held, per year | $7 | $8 |
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 VOOG and XLK overlap?
VOOG and XLK overlap 52.3% by portfolio weight — substantial duplication if you hold both. They share 41 holdings. The figure comes from current issuer holdings files (VOOG as of 2026-06-30, XLK as of 2026-07-23).
How is the overlap between VOOG and XLK calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If VOOG holds a stock at 6% and XLK 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 VOOG and XLK?
That depends on your goals — we state facts, not advice. At 52.3% overlap, each fund still contributes meaningfully distinct exposure.
What does VOOG own that XLK doesn't?
VOOG holds 148 positions and XLK holds 76; 107 of VOOG's positions don't appear in XLK at all, and they are 47.6% of VOOG by weight.
You probably hold more than two funds
This page compares VOOG and XLK. Paste your whole portfolio — brokerage, 401(k), IRA — and see the overlap across every fund at once, plus what you actually own underneath them and your own Effective Funds number. Free, no account, nothing stored.
X-ray my portfolio — free →Watch VOOG vs XLK
We re-read both funds’ published holdings every weeknight. Leave an address and we'll tell you when what's inside actually changes.
Not sending yet — email alerts are built but switched off, and you'll be among the first when they turn on. No spam, one-click unsubscribe.
Related comparisons
Sources: issuer holdings files, VOOG as of 2026-06-30, XLK as of 2026-07-23. Weights are fractions of each fund. Diagnostics, not advice.