IWF vs VXF: 5% overlap
iShares Russell 1000 Growth ETF and Vanguard Extended Market ETF share 5.5% 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
IWF and VXF hold 176 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IWF | in VXF | Δ |
|---|---|---|---|
| SNOW | 0.3% | 1.0% | 0.7% |
| NET | 0.3% | 0.9% | 0.6% |
| BE | 0.2% | 0.9% | 0.7% |
| SPCX | 0.2% | 1.1% | 1.0% |
| ALAB | 0.2% | 0.7% | 0.6% |
| CASH | 0.1% | 3.8% | 3.6% |
| CRDO | 0.1% | 0.5% | 0.4% |
| RKLB | 0.1% | 0.6% | 0.5% |
| NTRA | 0.1% | 0.4% | 0.3% |
| RVMD | 0.1% | 0.4% | 0.3% |
Where IWF and VXF 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 | VXF | Δ |
|---|---|---|---|
| Information Technology | 55.0% | 17.6% | +37.4pp |
| Industrials | 8.5% | 19.8% | −11.3pp |
| Communication Services | 15.7% | 4.5% | +11.3pp |
| Financials | 4.7% | 13.9% | −9.2pp |
| Health Care | 5.6% | 13.2% | −7.6pp |
| Real Estate | 0.4% | 4.8% | −4.4pp |
| Materials | 0.3% | 4.1% | −3.8pp |
| Cash and/or Derivatives | 0.1% | 3.8% | −3.6pp |
Δ is IWF minus VXF, 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
94.0% of IWF by weight, held in no part of VXF.
66.1% of VXF 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 | VXF | |
|---|---|---|
| Top 10 holdings | 56.1% | 10.6% |
| Positions held | 370 | 3,327 |
| Cost per $10,000 held, per year | $19 | $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 IWF and VXF overlap?
IWF and VXF overlap 5.5% by portfolio weight — largely distinct portfolios. They share 176 holdings. The figure comes from current issuer holdings files (IWF as of 2026-07-23, VXF as of 2026-06-30).
How is the overlap between IWF and VXF 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 VXF 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 VXF?
That depends on your goals — we state facts, not advice. At 5.5% overlap, each fund still contributes meaningfully distinct exposure.
What does IWF own that VXF doesn't?
IWF holds 370 positions and VXF holds 3,327; 193 of IWF's positions don't appear in VXF at all, and they are 94.0% of IWF by weight.
You probably hold more than two funds
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Related comparisons
Sources: issuer holdings files, IWF as of 2026-07-23, VXF as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.