IWF vs VOOV: 24% overlap
iShares Russell 1000 Growth ETF and Vanguard S&P 500 Value ETF 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 27 days apart — VOOV 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 1.8. Two funds that shared nothing would score 2.0; two identical funds score 1.0.
Top shared holdings
IWF and VOOV hold 122 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IWF | in VOOV | Δ |
|---|---|---|---|
| AAPL | 8.3% | 7.3% | 1.0% |
| TSLA | 2.8% | 1.6% | 1.3% |
| V | 1.9% | 0.9% | 1.0% |
| TXN | 0.8% | 0.9% | 0.1% |
| HD | 0.8% | 1.2% | 0.4% |
| GE | 1.2% | 0.6% | 0.5% |
| AMZN | 0.6% | 3.8% | 3.2% |
| COST | 0.6% | 1.4% | 0.9% |
| WDC | 0.5% | 0.8% | 0.2% |
| MRVL | 0.5% | 0.5% | 0.0% |
Where IWF 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 | IWF | VOOV | Δ |
|---|---|---|---|
| Information Technology | 53.9% | 20.5% | +33.4pp |
| Communication Services | 16.2% | 2.9% | +13.3pp |
| Financials | 4.9% | 15.3% | −10.4pp |
| Consumer Staples | 1.4% | 8.8% | −7.4pp |
| Health Care | 5.7% | 12.2% | −6.5pp |
| Energy | 0.5% | 6.6% | −6.1pp |
| Utilities | 0.3% | 4.4% | −4.1pp |
| Materials | 0.3% | 3.7% | −3.4pp |
Δ is IWF 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
68.4% of IWF by weight, held in no part of VOOV.
57.1% of VOOV by weight, held in no part of IWF.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IWF | VOOV | |
|---|---|---|
| Top 10 holdings | 56.1% | 23.8% |
| Positions held | 369 | 438 |
| Cost per $10,000 held, per year | $19 | $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 IWF and VOOV overlap?
IWF and VOOV overlap 24.2% by portfolio weight — moderate overlap. They share 122 holdings. The figure comes from current issuer holdings files (IWF as of 2026-07-27, VOOV as of 2026-06-30).
How is the overlap between IWF and VOOV calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IWF 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 IWF and VOOV?
That depends on your goals — we state facts, not advice. At 24.2% overlap, each fund still contributes meaningfully distinct exposure.
What does IWF own that VOOV doesn't?
IWF holds 369 positions and VOOV holds 438; 246 of IWF's positions don't appear in VOOV at all, and they are 68.4% of IWF by weight.
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Related comparisons
Sources: issuer holdings files, IWF as of 2026-07-27, VOOV as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.