IVW vs VONG: 74% overlap
iShares S&P 500 Growth ETF and Vanguard Russell 1000 Growth ETF share 74.2% of their portfolios by weight — computed as Σ min(wA, wB) over every holding both funds own.
Different holding dates. These holdings were published 27 days apart — VONG as of 2026-06-30, the rest through 2026-07-27. 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 1.3. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IVW and VONG hold 105 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IVW | in VONG | Δ |
|---|---|---|---|
| NVDA | 13.9% | 13.8% | 0.1% |
| AAPL | 7.2% | 6.7% | 0.5% |
| GOOGL | 5.6% | 6.2% | 0.6% |
| AVGO | 5.3% | 5.2% | 0.1% |
| GOOG | 4.5% | 5.0% | 0.4% |
| MSFT | 8.5% | 4.1% | 4.4% |
| META | 3.8% | 3.0% | 0.8% |
| MU | 3.0% | 3.9% | 0.9% |
| LLY | 2.8% | 2.8% | 0.1% |
| AMD | 2.4% | 2.8% | 0.4% |
Where IVW and VONG 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 | VONG | Δ |
|---|---|---|---|
| Financials | 9.4% | 4.3% | +5.1pp |
| Information Technology | 51.5% | 54.3% | −2.7pp |
| Industrials | 6.7% | 8.8% | −2.1pp |
| Health Care | 6.5% | 5.4% | +1.1pp |
| Communication Services | 15.1% | 16.1% | −1.0pp |
| Energy | 0.0% | 0.4% | −0.4pp |
| Real Estate | 0.7% | 0.4% | +0.3pp |
| Cash and/or Derivatives | 0.1% | 0.3% | −0.2pp |
Δ is IVW minus VONG, 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
13.4% of IVW by weight, held in no part of VONG.
13.7% of VONG 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 | VONG | |
|---|---|---|
| Top 10 holdings | 58.2% | 54.3% |
| Positions held | 149 | 370 |
| Cost per $10,000 held, per year | $18 | $6 |
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 VONG overlap?
IVW and VONG overlap 74.2% by portfolio weight — substantial duplication if you hold both. They share 105 holdings. The figure comes from current issuer holdings files (IVW as of 2026-07-27, VONG as of 2026-06-30).
How is the overlap between IVW and VONG 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 VONG 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 VONG?
That depends on your goals — we state facts, not advice. At 74.2% overlap, most of what one fund holds, the other holds too. Expense ratios: IVW 0.18% versus VONG 0.06%.
What does IVW own that VONG doesn't?
IVW holds 149 positions and VONG holds 370; 43 of IVW's positions don't appear in VONG at all, and they are 13.4% of IVW by weight.
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Related comparisons
Sources: issuer holdings files, IVW as of 2026-07-27, VONG as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.