MGK vs VTTSX: 24% overlap
Vanguard Mega Cap Growth ETF and Vanguard Target Retirement 2060 share 24.2% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published about 3 months apart — VTTSX as of 2026-03-31, the rest through 2026-06-30. Each fund is compared using its most recent file, so any trading in between shows up as a difference.
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 VTTSX hold 57 of the same securities. The ten contributing most to the overlap figure:
| Holding | in MGK | in VTTSX | Δ |
|---|---|---|---|
| NVDA | 13.2% | 3.3% | 9.9% |
| AAPL | 12.1% | 3.1% | 9.1% |
| MSFT | 7.5% | 2.0% | 5.5% |
| AMZN | 4.4% | 1.7% | 2.8% |
| GOOGL | 5.9% | 1.5% | 4.4% |
| AVGO | 4.3% | 1.3% | 3.0% |
| GOOG | 4.6% | 1.2% | 3.5% |
| META | 4.1% | 0.9% | 3.2% |
| TSLA | 3.9% | 0.9% | 3.1% |
| LLY | 3.4% | 0.7% | 2.7% |
Where MGK and VTTSX 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 | VTTSX | Δ |
|---|---|---|---|
| Information Technology | 58.6% | 26.3% | +32.3pp |
| Communication Services | 16.2% | 6.0% | +10.2pp |
| Financials | 4.0% | 14.1% | −10.2pp |
| Industrials | 2.6% | 10.6% | −8.0pp |
| Unclassified | 0.0% | 6.1% | −6.1pp |
| Consumer Staples | 0.4% | 4.1% | −3.7pp |
| Consumer Discretionary | 11.2% | 7.6% | +3.6pp |
| Treasuries | 0.0% | 3.3% | −3.3pp |
Δ is MGK minus VTTSX, 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
0.0% of MGK by weight, held in no part of VTTSX.
74.3% of VTTSX 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 | VTTSX | |
|---|---|---|
| Top 10 holdings | 63.5% | 19.3% |
| Positions held | 57 | 6 |
| Cost per $10,000 held, per year | $5 | $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 MGK and VTTSX overlap?
MGK and VTTSX overlap 24.2% by portfolio weight — moderate overlap. They share 57 holdings. The figure comes from current issuer holdings files (MGK as of 2026-06-30, VTTSX as of 2026-03-31).
How is the overlap between MGK and VTTSX 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 VTTSX 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 VTTSX?
That depends on your goals — we state facts, not advice. At 24.2% overlap, each fund still contributes meaningfully distinct exposure.
What does MGK own that VTTSX doesn't?
MGK holds 57 positions and VTTSX holds 6; 0 of MGK's positions don't appear in VTTSX at all, and they are 0.0% of MGK by weight.
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Related comparisons
Sources: issuer holdings files, MGK as of 2026-06-30, VTTSX as of 2026-03-31. Weights are fractions of each fund. Diagnostics, not advice.