IWB vs DFUS: Holdings Overlap
iShares · 1005 holdings · $49.9B · as of 2026-03-31
DFUSDimensional U.S. Equity Market ETF
Dimensional · 2235 holdings · $20.9B · as of 2026-04-30
Holdings snapshots are 30 days apart (IWB: 2026-03-31, DFUS: 2026-04-30). Weights and index membership change between snapshots, so the true current overlap is typically higher than shown. For funds tracking the same index, the gap can be 5–15 points.
How similar are IWB and DFUS?
iShares Russell 1000 ETF (IWB, by iShares) holds 1005 positions; Dimensional U.S. Equity Market ETF (DFUS, by Dimensional) holds 2235. They have 888 holdings in common, and by portfolio weight the two funds are 91.0% identical. In practical terms the pair is essentially interchangeable, so holding both adds little diversification.
- Overlap by Weight
- 91.0%Sum of the smaller weight of each shared holding
- Shared Holdings
- 888IWB holds 1005 · DFUS holds 2235
- Weight in Shared Holdings
- IWB 97%·DFUS 96%Share of each fund's weight in stocks both funds own
Based on each fund's latest official holdings. How is this calculated?
What makes each fund different
Only in IWB
117 of 1005 positions (2.9% of the fund) are not held by DFUS. Showing the top 30 by weight.
Only in DFUS
1347 of 2235 positions (4.3% of the fund) are not held by IWB. Showing the top 30 by weight.
Sector Breakdown
| Sector | IWB | DFUS |
|---|---|---|
| Information Technology | 30.9% | 33.3% |
| Financials | 12.9% | 12.6% |
| Communication Services | 10.2% | 10.8% |
| Industrials | 9.9% | 10.4% |
| Consumer Discretionary | 10.0% | 10.3% |
| Other Sectors | 26.0% | 22.3% |
Share of each fund's portfolio weight by GICS-style sector, compiled from issuer fund data and our own classification of the holdings, not the issuers' published sector charts.
Performance
| Fund | 1M | YTD | 1Y | 3Y (ann.) | 5Y (ann.) | 10Y (ann.) | Yield |
|---|---|---|---|---|---|---|---|
| IWB | +3.4% | +13.9% | +23.1% | +20.9% | +12.6% | +15.0% | 0.89% |
| DFUS | +3.4% | +14.5% | +24.4% | +21.2% | +13.1% | — | 0.83% |
Total returns including dividends, from adjusted daily closes as of 2026-08-07. 3Y/5Y/10Y are annualized. Yield is trailing-12-month distributions over the last close. Past performance does not predict future results.
Project the growth of $10,000 in IWB vs DFUS →
Shared Holdings(888)
The top 10 shared positions account for 36% of the overlap, led by NVDA, AAPL and MSFT.
 NVDANVIDIA Corp. COM | 6.81% | 6.96% | 6.81% |
|---|---|---|---|
 AAPLApple Inc. COM | 6.10% | 5.85% | 5.85% |
 MSFTMicrosoft Corp. COM | 4.58% | 4.51% | 4.51% |
 AMZNAmazon.com, Inc. COM | 3.33% | 3.83% | 3.33% |
 GOOGLAlphabet Inc. CAP STK CL A | 2.79% | 3.30% | 2.79% |
 AVGOBroadcom Inc COM | 2.39% | 2.89% | 2.39% |
 GOOGAlphabet Inc. CAP STK CL C | 2.27% | 2.74% | 2.27% |
 METAMeta Platforms, Inc., Class A | 2.08% | 2.01% | 2.01% |
 TSLATesla Inc COM | 1.75% | 1.78% | 1.75% |
 BRK-BBerkshire Hathaway, Inc., Class B | 1.47% | 1.30% | 1.30% |
 JPMJPMorgan Chase & Co. COM | 1.33% | 1.26% | 1.26% |
 LLYEli Lilly & Co. COM | 1.23% | 1.12% | 1.12% |
 XOMExxon Mobil Corp. COM | 1.20% | 0.97% | 0.97% |
 WMTWalmart Inc COM | 0.90% | 0.87% | 0.87% |
 JNJJohnson & Johnson COM | 0.98% | 0.83% | 0.83% |
 VVisa, Inc., Class A | 0.85% | 0.83% | 0.83% |
 COSTCostco Wholesale Corporation COM | 0.74% | 0.68% | 0.68% |
 MAMasterCard Incorporated CL A | 0.67% | 0.63% | 0.63% |
 MUMicron Technology Inc. COM | 0.63% | 0.89% | 0.63% |
 NFLXNetflix, Inc. COM | 0.68% | 0.59% | 0.59% |
 ABBVAbbVie Inc. COM | 0.64% | 0.56% | 0.56% |
 CVXChevron Corp. COM | 0.65% | 0.55% | 0.55% |
 CATCaterpillar Inc COM | 0.55% | 0.63% | 0.55% |
 AMDAdvanced Micro Devices Inc. COM | 0.55% | 0.86% | 0.55% |
 BACBank of America Corp. COM | 0.53% | 0.54% | 0.53% |
Showing the top 250 of 888 shared holdings by overlap weight.
Frequently Asked Questions
How much do IWB and DFUS overlap?
IWB and DFUS overlap by 91.0% of portfolio weight. They share 888 holdings (IWB holds 1005 positions and DFUS holds 2235), based on each fund's latest SEC-reported holdings.
Is it redundant to own both IWB and DFUS?
The two portfolios are 91.0% identical by weight. Owning both is largely redundant: they are close to the same portfolio, so a second position mostly duplicates the first.
What are the biggest shared holdings of IWB and DFUS?
The largest positions held by both funds are NVDA, AAPL, MSFT, AMZN and GOOGL. Together the top 10 shared positions account for 36% of the total overlap.
What does IWB own that DFUS doesn't?
117 positions (2.9% of IWB) are unique to IWB, led by WELL, PLD and EQIX. In the other direction, 1347 positions (4.3% of DFUS) are unique to DFUS.