IVW vs VOOG: 96% overlap
iShares S&P 500 Growth ETF and Vanguard S&P 500 Growth ETF share 95.6% 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 1.0. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IVW and VOOG hold 148 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IVW | in VOOG | Δ |
|---|---|---|---|
| NVDA | 14.7% | 13.7% | 1.0% |
| MSFT | 8.2% | 7.8% | 0.4% |
| AAPL | 6.9% | 6.0% | 0.9% |
| GOOGL | 5.4% | 5.9% | 0.5% |
| AVGO | 5.4% | 5.0% | 0.4% |
| GOOG | 4.4% | 4.7% | 0.3% |
| META | 3.9% | 3.5% | 0.4% |
| AMZN | 3.5% | 3.5% | 0.0% |
| MU | 3.2% | 3.7% | 0.4% |
| LLY | 2.7% | 2.7% | 0.0% |
Where IVW 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 | IVW | VOOG | Δ |
|---|---|---|---|
| Financials | 9.2% | 8.5% | +0.6pp |
| Communication Services | 14.7% | 15.2% | −0.5pp |
| Consumer Discretionary | 8.0% | 8.5% | −0.4pp |
| Information Technology | 52.5% | 52.2% | +0.3pp |
| Industrials | 6.6% | 6.9% | −0.2pp |
| Health Care | 6.3% | 6.2% | +0.1pp |
| Cash and/or Derivatives | 0.1% | 0.2% | −0.1pp |
| Real Estate | 0.7% | 0.6% | +0.1pp |
Δ is IVW 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
0.0% of IVW by weight, held in no part of VOOG.
0.0% of VOOG 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 | VOOG | |
|---|---|---|
| Top 10 holdings | 58.2% | 56.4% |
| Positions held | 149 | 148 |
| Cost per $10,000 held, per year | $18 | $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 IVW and VOOG overlap?
IVW and VOOG overlap 95.6% by portfolio weight — they are effectively the same fund. They share 148 holdings. The figure comes from current issuer holdings files (IVW as of 2026-07-23, VOOG as of 2026-06-30).
How is the overlap between IVW and VOOG 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 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 IVW and VOOG?
That depends on your goals — we state facts, not advice. At 95.6% overlap, most of what one fund holds, the other holds too. Expense ratios: IVW 0.18% versus VOOG 0.07%.
What does IVW own that VOOG doesn't?
IVW holds 149 positions and VOOG holds 148; 0 of IVW's positions don't appear in VOOG at all, and they are 0.0% of IVW by weight.
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Related comparisons
Sources: issuer holdings files, IVW as of 2026-07-23, VOOG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.