IVW vs VIMAX: 7% overlap
iShares S&P 500 Growth ETF and Vanguard Mid-Cap Index Admiral share 7.5% 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
IVW and VIMAX hold 64 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IVW | in VIMAX | Δ |
|---|---|---|---|
| STX | 0.4% | 1.0% | 0.7% |
| VRT | 0.3% | 1.2% | 0.9% |
| HWM | 0.3% | 1.0% | 0.7% |
| NEM | 0.3% | 0.5% | 0.2% |
| PWR | 0.3% | 1.0% | 0.8% |
| DDOG | 0.2% | 0.8% | 0.6% |
| HOOD | 0.2% | 0.8% | 0.5% |
| HLT | 0.2% | 0.4% | 0.2% |
| RCL | 0.2% | 0.7% | 0.5% |
| MPWR | 0.2% | 0.6% | 0.4% |
Where IVW and VIMAX 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 | IVW | VIMAX | Δ |
|---|---|---|---|
| Information Technology | 52.5% | 16.1% | +36.4pp |
| Industrials | 6.6% | 19.6% | −12.9pp |
| Communication Services | 14.7% | 2.8% | +12.0pp |
| Utilities | 0.4% | 8.4% | −8.0pp |
| Energy | 0.0% | 7.3% | −7.3pp |
| Financials | 9.2% | 14.0% | −4.8pp |
| Real Estate | 0.7% | 5.1% | −4.4pp |
| Materials | 0.3% | 4.3% | −4.0pp |
Δ is IVW minus VIMAX, 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
92.5% of IVW by weight, held in no part of VIMAX.
69.9% of VIMAX by weight, held in no part of IVW.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IVW | VIMAX | |
|---|---|---|
| Top 10 holdings | 58.2% | 9.5% |
| Positions held | 149 | 283 |
| Cost per $10,000 held, per year | $18 | $5 |
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 IVW and VIMAX overlap?
IVW and VIMAX overlap 7.5% by portfolio weight — largely distinct portfolios. They share 64 holdings. The figure comes from current issuer holdings files (IVW as of 2026-07-23, VIMAX as of 2026-06-30).
How is the overlap between IVW and VIMAX calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IVW holds a stock at 6% and VIMAX 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 IVW and VIMAX?
That depends on your goals — we state facts, not advice. At 7.5% overlap, each fund still contributes meaningfully distinct exposure.
What does IVW own that VIMAX doesn't?
IVW holds 149 positions and VIMAX holds 283; 84 of IVW's positions don't appear in VIMAX at all, and they are 92.5% of IVW by weight.
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Related comparisons
Sources: issuer holdings files, IVW as of 2026-07-23, VIMAX as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.