MGK vs VOOV: 21% overlap
Vanguard Mega Cap Growth ETF and Vanguard S&P 500 Value ETF share 20.8% 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 1.8. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
MGK and VOOV hold 27 of the same securities. The ten contributing most to the overlap figure:
| Holding | in MGK | in VOOV | Δ |
|---|---|---|---|
| AAPL | 12.1% | 7.3% | 4.8% |
| AMZN | 4.4% | 3.8% | 0.7% |
| TSLA | 3.9% | 1.6% | 2.4% |
| INTC | 1.1% | 2.3% | 1.2% |
| V | 1.8% | 0.9% | 0.9% |
| WDC | 0.5% | 0.8% | 0.2% |
| MRVL | 1.0% | 0.5% | 0.6% |
| MA | 1.5% | 0.5% | 1.0% |
| CASH | 0.5% | 0.5% | 0.0% |
| VRTX | 0.6% | 0.4% | 0.2% |
Where MGK and VOOV 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 | MGK | VOOV | Δ |
|---|---|---|---|
| Information Technology | 58.6% | 20.5% | +38.1pp |
| Communication Services | 16.2% | 2.9% | +13.3pp |
| Financials | 4.0% | 15.3% | −11.3pp |
| Industrials | 2.6% | 11.4% | −8.7pp |
| Consumer Staples | 0.4% | 8.8% | −8.4pp |
| Health Care | 4.9% | 12.2% | −7.3pp |
| Energy | 0.0% | 6.6% | −6.6pp |
| Utilities | 0.0% | 4.4% | −4.4pp |
Δ is MGK minus VOOV, 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
63.3% of MGK by weight, held in no part of VOOV.
77.8% of VOOV by weight, held in no part of MGK.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| MGK | VOOV | |
|---|---|---|
| Top 10 holdings | 63.5% | 23.8% |
| Positions held | 57 | 438 |
| Cost per $10,000 held, per year | $5 | $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 MGK and VOOV overlap?
MGK and VOOV overlap 20.8% by portfolio weight — moderate overlap. They share 27 holdings. The figure comes from current issuer holdings files (MGK as of 2026-06-30, VOOV as of 2026-06-30).
How is the overlap between MGK and VOOV calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If MGK holds a stock at 6% and VOOV 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 MGK and VOOV?
That depends on your goals — we state facts, not advice. At 20.8% overlap, each fund still contributes meaningfully distinct exposure.
What does MGK own that VOOV doesn't?
MGK holds 57 positions and VOOV holds 438; 30 of MGK's positions don't appear in VOOV at all, and they are 63.3% of MGK by weight.
You probably hold more than two funds
This page compares MGK and VOOV. 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 MGK vs VOOV
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, MGK as of 2026-06-30, VOOV as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.