IWM vs VGT: 5% overlap
iShares Russell 2000 ETF and Vanguard Information Technology ETF share 5.4% 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
IWM and VGT hold 164 of the same securities. The ten contributing most to the overlap figure:
| Holding | in IWM | in VGT | Δ |
|---|---|---|---|
| CASH | 0.2% | 0.4% | 0.2% |
| MXL | 0.3% | 0.1% | 0.1% |
| HUT | 0.4% | 0.1% | 0.3% |
| ACMR | 0.2% | 0.1% | 0.1% |
| VSAT | 0.3% | 0.1% | 0.2% |
| VSH | 0.2% | 0.1% | 0.1% |
| UCTT | 0.1% | 0.1% | 0.0% |
| FROG | 0.3% | 0.1% | 0.2% |
| RIOT | 0.3% | 0.1% | 0.2% |
| CIFR | 0.3% | 0.1% | 0.2% |
Where IWM and VGT 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 | IWM | VGT | Δ |
|---|---|---|---|
| Information Technology | 12.8% | 99.5% | −86.6pp |
| Health Care | 19.9% | 0.0% | +19.9pp |
| Financials | 19.0% | 0.0% | +19.0pp |
| Industrials | 14.7% | 0.0% | +14.7pp |
| Consumer Discretionary | 9.4% | 0.0% | +9.4pp |
| Energy | 6.1% | 0.0% | +6.1pp |
| Real Estate | 5.9% | 0.0% | +5.9pp |
| Materials | 4.2% | 0.0% | +4.2pp |
Δ is IWM minus VGT, 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
87.4% of IWM by weight, held in no part of VGT.
94.3% of VGT by weight, held in no part of IWM.
A large count with a small weight is the usual shape: the positions one fund adds are typically its smallest ones.
Concentration and cost
| IWM | VGT | |
|---|---|---|
| Top 10 holdings | 3.3% | 59.9% |
| Positions held | 1,967 | 322 |
| Cost per $10,000 held, per year | $19 | $9 |
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 IWM and VGT overlap?
IWM and VGT overlap 5.4% by portfolio weight — largely distinct portfolios. They share 164 holdings. The figure comes from current issuer holdings files (IWM as of 2026-07-23, VGT as of 2026-06-30).
How is the overlap between IWM and VGT calculated?
As the sum of the smaller weight in each fund, over every holding both funds own: Σ min(wA, wB). If IWM holds a stock at 6% and VGT 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 IWM and VGT?
That depends on your goals — we state facts, not advice. At 5.4% overlap, each fund still contributes meaningfully distinct exposure.
What does IWM own that VGT doesn't?
IWM holds 1,967 positions and VGT holds 322; 1,802 of IWM's positions don't appear in VGT at all, and they are 87.4% of IWM by weight.
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Related comparisons
Sources: issuer holdings files, IWM as of 2026-07-23, VGT as of 2026-06-30. Weights are fractions of each fund. Diagnostics, not advice.